Circutor cSMARTIII Smart power factor energy regulator Owner's Manual

REACTIVE ENERGY REGULATOR

Computer SMART III

INSTRUCTION MANUAL

(M015B01-03-21A)


2 Instruction Manual


SAFETY PRECAUTIONS

Follow the warnings described in this manual with the symbols shown below.

DANGER

Warns of a risk, which could result in personal injury or material damage.

ATTENTION

Indicates that special attention should be paid to a specific point.

If you must handle the unit for its installation, start-up or maintenance, the following should be taken into consideration:

Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the unit. In particular, handling with voltages applied may result in electric shock, which may cause death or serious injury to personnel. Defective installation or maintenance may also lead to the risk of fire.

Read the manual carefully prior to connecting the unit. Follow all installation and maintenance instructions throughout the unit’s working life. Pay special attention to the installation standards of the

National Electrical Code.

Refer to the instruction manual before using the unit

In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result in injury or damage to the unit and /or installations.

CIRCUTOR, SA reserves the right to modify features or the product manual without prior notification.

DISCLAIMER

CIRCUTOR, SA reserves the right to make modifications to the device or the unit specifications set out in this instruction manual without prior notice.

CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device specifications and the most updated manuals.

www.circutor.com

CIRCUTOR, recommends using the original cables and accessories that are supplied with the device.

Instruction Manual 3

4


CONTENTS

SAFETY PRECAUTIONS ��3

DISCLAIMER ��3

CONTENTS ��4

REVISION LOG ��6

SYMBOLS ��6

1�- VERIFICATION UPON RECEPTION ��7

2�- PRODUCT DESCRIPTION ��7

3�- DEVICE INSTALLATION ��9

3�1�- PRIOR RECOMMENDATIONS ��9

3�2�- RECOMMENDATIONS FOR USING THE COMPUTER SMART III REGULATOR IN MEDIUM-VOLTAGE AUTOMATIC

CAPACITOR BANKS ��9

3�3�- INSTALLATION ��10

3�4�- DEVICE TERMINALS �� 12

3�5�- CONNECTION DIAGRAM �� 13

3�5�1�- 3 VOLTAGES + NEUTRAL AND 3 CURRENTS, COMPUTER SMART III 6 MODEL �� 13



3�5�4�- 3 VOLTAGES + NEUTRAL AND 1 CURRENT, COMPUTER SMART III 6 MODEL �� 16

3�5�5�- 3 VOLTAGES + NEUTRAL AND 1 CURRENT, COMPUTER SMART III 12 MODEL �� 17

3�5�6�- 3 VOLTAGES + NEUTRAL AND 1 CURRENT, COMPUTER SMART III 14 MODEL ��18

3�5�7�- 2 VOLTAGES AND 1 CURRENT, COMPUTER SMART III 6 MODEL �� 19



3�5�10�- LEAKAGE CURRENT CONNECTION, IΔ ��22

3�6�- STARTING UP THE DEVICE ��23

4�- OPERATION ��24

4�1�- DEFINITIONS ��25

4�1�1� FOUR-QUADRANT REGULATOR ��25

4�1�2� STAGES AND STEPS ��25

4�1�3� FCP SYSTEM (FAST COMPUTERIZED PROGRAM) ��25

4�1�4� REGULATION PROGRAM ��25

4�1�5� PLUG AND PLAY ��26

4�1�6� CONNECTION TIME (TON) AND RECLOSING TIME (TREC) ��26

4�1�7� THD AND HARMONICS ��26

4�2�- MEASUREMENT PARAMETERS ��27

4�2�1� Connection type: 3U.3C

��27


��28


��29

4�3�- KEYBOARD FUNCTIONS �� 30

4�4�- DISPLAY ��32

4�4�1� STATUS OF THE CAPACITORS ��33

4�4�2� STATUS OF THE DEVICE ��33

4�4�3� ANALOGUE BAR ��34

4�4�4� OTHER SYMBOLS OF THE DISPLAY ��34

4�5�- LED INDICATORS ��35

4�6�OPERATING STATES ��36

4�6�1� MEASUREMENT STATUS ��36

4�6�2� TEST STATUS ��55

4�7�- INPUTS �� 58

4�8�- OUTPUTS �� 58

4�9�- COMMUNICATIONS ��59

4�9�1� CONNECTIONS ��59

4�9�2� PROTOCOL �� 60

4�9�3� MODBUS MEMORY MAP �� 61

4�9�4� EXAMPLE OF A MODBUS QUERY ��70

5�- CONFIGURATION �� 71

5�1�PLUG&PLAY ��72

5�2�- CURRENT TRANSFORMATION RATIO ��75

5�3�- TARGET COS φ ��76

Instruction Manual


5�4�- CONNECTION AND RECLOSING TIME ��77

5�5�- CONNECTION TYPE ��78

5�6�- PHASE CONNECTION ��78

5�7�- NO� OF STAGES �� 80

5�8�- PROGRAM ��81

5�9�- C/K FACTOR ��82

5�10�- VOLTAGE LEVEL ��84

5�11�- EXPERT SETUP �� 85

5�12�- VOLTAGE TRANSFORMATION RATIO �� 86

5�13�- HYSTERESIS ��87

5�14�- STATUS OF THE STAGES �� 88

5�15�- DISPLAY �� 89

5�16�- ANALOGUE BAR �� 90

5�17�- FAN �� 90

5�18�- UNDERVOLTAGE TRIP�� 91

5�19�- COMMUNICATIONS ��93

5�20�- CLEAR��94

5�21�- ENABLING ALARMS ��95

5�22�- VOLTAGE ALARMS �� 96

5�23�- COS φ LOW ALARM ��97

5�24�- COS φ HIGH ALARM �� 98

5�25�- VOLTAGE THD ALARM �� 99

5�26�- CURRENT x I THD ALARM ��100

5�27�- TEMPERATURE ALARM ��102

5�28�- LEAKAGE CURRENT ALARM ��103

5�29�- NO� OF OPERATIONS ALARM ��104

5�30�- SIMULATION SCREEN ��105

6�- TECHNICAL FEATURES ��106

7�- MAINTENANCE AND TECHNICAL SERVICE ��109

8�- WARRANTY ��109

9�- CE CERTIFICATE �� 110



REVISION LOG

Date

05/14

03/15

04/16

03/18

06/18

01/20

05/20

01/21

Table 1: Revision log�

Revision

M015B01-03-14A

M015B01-03-15A

M015B01-03-15B

Description

Initial Version

Modification in sections:

3.5. - 4.2. - 4.3. - 4.9. - 9


2 - 3.4. - 3.5. - 4.4. - 4.4.1. - 4.6.1.1.- 4.6.1.2.- 4.6.1.3.-

4.8.- 4.9.3. - 5.7. - 5.13. - 6.

M015B01-03-18A

M015B01-03-18B

M015B01-03-20A

M015B01-03-20B

M015B01-03-21A


4.9.3. - 5.14. - 9.


4.9.3.


2. - 4.4. - 4.5. - 4.9.3. - 5.14.


4.9.3. - 5.17.


4.6.1. - 4.9.3. - 5.3. - 5.13. - 5.23. - 5.24.

SYMBOLS

Symbol

~

Table 2: Symbols

Description

In compliance with the relevant European directive.

Device covered by European directive 2012/19/EC. At the end of its useful life, do not leave the unit in a household waste container. Follow local regulations on electronic equipment recycling.

DC current

AC current

6

Note: Devices images are for illustrative purposes only and may differ from the actual device.



1.- VERIFICATION UPON RECEPTION

Check the following points upon receiving the device: a) The device meets the specifications described in your order.

b) The device has not suffered any damage during transport.

c) Check the features shown on the label of the device to make sure that they are suitable for the type of power grid to which the device will be connected. (Voltage and power supply frequency, measurement range, etc.) d) Perform an external visual inspection of the device prior to switching it on.

e) Check that it has been delivered with the following:

- An installation guide,

- Four retainers for rear attachment of the device,

If any problems are detected upon reception, immediately contact the transport company and/or the CIRCUTOR S�A� after-sales service.

2.- PRODUCT DESCRIPTION

The Computer SMART III reactive energy regulator is a device that measures the power grid cosine and controls capacitor connection and disconnection in order to correct it. It also calculates and displays the main electrical parameters of balanced or unbalanced single-phase and three-phase networks. The measurement is taken in RMS, via four AC voltage inputs and three current inputs.

There are 3 versions of the device, according to the number of output relays:

 Computer SMART III 6 , with six output relays.

 Computer SMART III 12 , with twelve output relays.

 Computer SMART III 14 , with fourteen output relays.

The device features:

- 5 keys that can be used to browse the various screens and program the device.

- 4 indicator LEDs : CPU, ALARM, FAN and Key PRESSED.

- LCD display : amber backlit, 70x60.7-mm display for viewing all the parameters.

- 2 digital inputs : for selecting the target cosine (4 target cosines).

- 2 digital outputs and 1 relay output : completely programmable as alarms.

- 1 relay output , specific for the fan.

6 output relays ( Computer SMART III 6 model) , 12 output relays ( Computer SMART III 12


Computer SMART III model) or 14 output relays ( Computer SMART III 14 model) for regulating the cos φ by means of capacitors.

- RS-485 communications, MODBUS RTU©.



3.- DEVICE INSTALLATION

3�1�- PRIOR RECOMMENDATIONS

In order to use the device safely, it is critical that individuals who handle it follow the safety measures set out in the standards of the country where it is being used, use the necessary personal protective equipment, and pay attention to the various warnings indicated in this instruction manual.

The Computer SMART III device must be installed by authorised and qualified staff.

The power supply plug must be disconnected and measuring systems switched off before handling, altering the connections or replacing the device. It is dangerous to handle the device while it is powered.

Also, it is critical to keep the cables in perfect condition in order to avoid accidents, personal injury and damage to installations.

The manufacturer of the device is not responsible for any damage resulting from failure by the user or installer to heed the warnings and/or recommendations set out in this manual, nor for damage resulting from the use of non-original products or accessories or those made by other manufacturers.

If an anomaly or malfunction is detected in the device, do not use it to take any measurements.

Inspect the work area before taking any measurements. Do not take measurements in dangerous areas or where there is a risk of explosion.

Disconnect the device from the power supply (device and measuring system power supply) before maintaining, repairing or handling the device's connections.

Please contact the after-sales service if you suspect that there is an operational fault in the device.

3�2�- RECOMMENDATIONS FOR USING THE COMPUTER SMART III REGULATOR IN MEDIUM-VOLT-

AGE AUTOMATIC CAPACITOR BANKS

Computer SMART III regulators can also be used for controlling medium-voltage automatic capacitor banks, always under the full responsibility of the personnel responsible for starting it up, and taking into account the various recommendations mentioned below, which should be strictly observed in every case in order to avoid the possible appearance of problems in the various elements that make up the capacitor bank.

The voltage and current measurement signals must be supplied to the regulator from voltage and current transformers that are suitable for the tolerable ranges of the voltage and current measurement inputs of the regulator.


10


The stage connection and reclosing times must be adapted to the discharge time of the capacitors, and to the pre-determined operating rates, according to their specific features, for the capacitor bank operating elements. It is important to remember that excessively short connection times can cause serious damage to the components of the device.

Once the device is installed, select the High Voltage option in the programming menu (

“5.10.- VOLTAGE

LEVEL”

).

When this option is selected the following functions are disabled in the device:

 The automatic programming function (Plug&Play).

 The function of automatically testing the status of the capacitors (AutoTest).

 The leakage current measurement and related alarms.

3�3�- INSTALLATION

The Computer SMART III regulator is connected to devices that contain capacitors, which are kept charged after the voltage is taken away. Wait at least 5 minutes after the device is disconnected before handling its internal components, in order to avoid the risk of electric shock.

Any manipulation or use of the device other than that specified by the manufacturer may compromise user safety�

Make sure that the devices are correctly earthed before they are connected. A faulty earth connection could lead to faulty operation and lead to a risk of electrical shock for the user or person handling the device.

Resonance can occur when the device is connected with no load. In this case, the voltage harmonics can be amplified, causing damage to the compensation device and other devices connected to the mains.

The persons responsible for installing or operating the Computer SMART III must follow common safety measures for LV or MV electrical installations in order to guarantee safe operation according to the installation location. In addition, they must take into account all the safety warnings stated in this instruction manual.

The device will be installed on a panel (138+1 x 138+1 mm panel boring, in compliance with DIN 43700).

All connections are inside the electric panel.

Terminals, opening covers or removing elements can expose parts that are hazardous to the touch while the device is powered. Do not use the device until has been completely installed.

The device must be connected to a power circuit that is protected with gL fuses (IEC 269) or M fuses, with a rating of 0.5 to 2 A. It must be fitted with a circuit breaker or equivalent device for disconnecting the device from the power supply mains.

The power and voltage measurement circuits as well as the relay contact circuits must be connected with cables that have a minimum cross-section of 1.5 mm 2 .



One or three external current transformers (CT) need to be installed in order to measure current. Usually, the transformation ratio of these CTs is In/5 A, where In is at least 1.5 times the total maximum load current.

The secondary cables of the current transformers (CT) must have a minimum cross-section of 2.5 mm 2 . For distances between the CTs and the device of more than 25 m, this cross-section should be increased by 1 mm 2 for every 10 m.

The current transformers (CTs) must be installed at the power line connection point which carries all the current of the loads to be compensated as well as the current that is specific to the capacitors

( Figure 1

).

CORRECT INCORRECT

P1

S1

TC

S2

P2

P1

S1

TC

S2

~

~

P2

LOAD CAPACITORS

LOAD CAPACITORS

The current transformers (CT) must measure the combined current of the capacitors plus the loads

If it does not work, make sure that the

CTs are not short-circuited.

If the CTs are connected in this position, NONE OF THE CAPACITORS

WILL BE CONNECTED, even if there are inductive loads.

The device does not compensate�

TC

P1

P2

~

LOAD

S1

S2

CAPACITORS

If the CTs are connected in this position ALL THE CAPACITORS WILL

BE CONNECTED, but they will not be disconnected if the load drops.

Risk of over-compensation in the grid with no load�

Figure 1: Location of the current transformers


12


3�4�- DEVICE TERMINALS

1: A1, Auxiliary power supply.

2: A2, Auxiliary power supply.

3: V

L1

, L1 voltage input

4: V

L2

, L2 voltage input

5: V

L3

, L3 voltage input

6: V

LN,

Neutral voltage input

7: S1, L1 current input


Table 3:List of Computer SMART III terminals

Terminals of the top side of the device

23: R8, Relay output 8 ( Computer SMART III 12 and 14 models)




27: R12,

28: A(+)

Relay output 12 (

, RS-485

Computer SMART III 12 and 14

29: B(-) , RS-485

30: S , GND for RS-485



31: 1 , Digital input 1

32: 1 , Digital input 2

11: S1,

12: S2,

L3 current input

L3 current input

33: C , Common to the digital inputs

34: 1 , Digital output 1

13: S1, Leakage current input

14: S2, Leakage current input

35: 2 , Digital output 2

36: C, Common to the digital outputs

15: COM, Common relays

16: R1,

17: R2,

Relay output 1

Relay output 2

37: Fan relay output

38: Fan relay output

39: NC , Alarm relay output

18: R3, Relay output 3 40: C , Alarm relay output

19: R4, Relay output 4

20: R5,

21: R6,

Relay output 5

Relay output 6

41: NO , Alarm relay output

42: COM, Common relays

43: R12, Relay output 13 ( Computer SMART III 14 model)

22: R7, Relay output 7 ( Computer SMART III 12 and 14 models) 44: R12, Relay output 14 ( Computer SMART III 14 model)

models)

1 2 3 4 5 6 7 8 9 10 11 12 13 14

18

19

20

15

16

17

21

22

23

24

25

26

27

42

43

44

28 29 30 31 32 33 34 35 36 37 38 39 40 41

Figure 2: Computer SMART III terminals�



3�5�- CONNECTION DIAGRAM

3�5�1�- 3 voltages + neutral and 3 currents, Computer SMART III 6 model

Connection type: 3U .

3C

Power

Supply

A B V

L1

V

L2

V

L3

V

LN S1

I

L1

I

L2 I

L3

S2 S1 S2 S1 S2

Power

Supply

L1

L2

L3

N

P1

S1 S2

P2

S1

P1

S2

P2

S1

P1

S2

P2

Relay

COM 1 2 3 4 5 6

Figure 3: 3 voltages + neutral and 3 currents, Computer SMART III 6 model�

Note: If the connection layout mentioned above is not respected, the phase must be adjusted, following the procedure described in section

“5.6.- PHASE CONNECTION”

Note: In this type of connection, the connection from Neutral to V

LN

is not mandatory.


14



3C

Power Supply

A1 A2 V

L1

V

L2

V

L3

V

LN

I

L1

S1 S2

I

L2

S1 S2

I

L3

S2


L1

L2

L3

N

Power Supply

P1

S1 S2

P2

S1

P1

S2

P2

S1

P1

S2

P2

Relay

COM 1 2 3 4 5 6 7 8 9 10 11 12


For Computer SMART III 12




LN

is not mandatory.




Connection type 3U .

3C

Power

Supply

A1 A2 V

L1

V

L2

V

L3

V

LN S1

I

L1

I

L2

I

L3

S2 S1 S2 S1 S2

L1

L2

L3

N

Power supply

P1

S1 S2

P2

S1

P1

S2

P2

S1

P1

S2

P2

Relay

COM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 COM





LN

is not mandatory.


16

3�5�4�- 3 voltages + neutral and 1 current, Computer SMART III 6 model


1C

Power

Supply

A B V

L1

V

L2

V

L3

V

LN S1

I

L1

I

L2

I

L3

S2 S1 S2 S1 S2


L1

L2

L3

N

Power

Supply

P1

S1 S2

P2

Relay

COM 1 2 3 4 5 6

Figure 6: 3 voltages + neutral and 1 current, Computer SMART III 6 model�




LN

is not mandatory.

Note: In this type of connection, the current transformer must be connected to the I

L1

terminals.





1C

Power Supply

A1 A2 V

L1

V

L2

V

L3

V

LN S1

I

L1

S2

I

L2

S1 S2

I

L3

L1

L2

L3

N

Power Supply

P1

S1 S2

P2

Relay

COM 1 2 3 4 5 6 7 8 9 10 11 12






LN

is not mandatory.


L1

terminals.


18



1C

Power

Supply

A1 A2 V

L1

V

L2

V

L3

V

LN S1

I

L1

I

L2

I

L3

S2 S1 S2 S1 S2


L1

L2

L3

N

Power

Supply

P1

S1 S2

P2

Relay

COM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 COM





LN

is not mandatory.


L1

terminals.



3�5�7�- 2 voltages and 1 current, Computer SMART III 6 model


1C

Power

Supply

A B V

L1

V

L2

V

L3

V

LN S1

I

L1

I

L2

I

L3

S2 S1 S2 S1 S2

L1

L2

L3

N

Power

Supply

P1

S1 S2

P2

Relay

COM 1 2 3 4 5 6

Figure 9: 2 voltages and 1 current, Computer SMART III 6 model�



Note: In this type of connection, the Neutral connection is not necessary.


L1

terminals, and the two voltages must be connected to V

L1

and V

L2

.


20




1C

Power Supply

A1 A2 V

L1

V

L2

V

L3

V

LN

I

L1

S1 S2

I

L2

S1 S2

I

L3

S2

L1

L2

L3

N

Power Supply

P1

S1 S2

P2

Relay

COM 1 2 3 4 5 6 7 8 9 101112







L1


L1

and V

L2

.





1C

Power

Supply

A1 A2 V

L1

V

L2

V

L3

V

LN S1

I

L1

I

L2

I

L3

S2 S1 S2 S1 S2

L1

L2

L3

N

Power

Supply

P1

S1 S2

P2

Relay

COM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 COM






L1


L1

and V

L2

.


22


3�5�10�- Leakage current connection, I Δ

To measure the leakage current, an earth leakage transformer must be used, such as WGS .

The leakage current transformer must be connected such as to measure the current of the capacitor bank. This will detect any leakage in the capacitors of the capacitor bank.

TC

S1

S2

I

L1,

I

L2,

I

L3

S1

S2

I

∆

~

LOAD CAPACITORS

Figure 12: Connection of the leakage current transformer (I

Δ

)�

Note: The earth leakage transformer must have a ratio of 500 turns. The maximum leakage current that the device can measure correctly is 1.5A AC, even though the maximum input is 5A AC via the earth leakage transformer.

Do not operate the leakage current transformer with the Computer SMART III powered on.



3�6�- STARTING UP THE DEVICE

Once the Computer SMART III is powered on, the following screen appears on the display,

Figure 13 ,

which shows the name of the device, the version and the model.

Figure 13: Computer SMART III home screen�

After a few seconds, the main measurement screen appears.


24

Inductive

Capacitive

Inductive

Capacitive


4.- OPERATION

The Computer SMART III is a reactive energy regulator. The device measures the cos and regulates the connection and disconnection of capacitors, via the relays, in order to correct it.

The control is carried out at the four quadrants,

Figure 14 .

φ of the mains

Inductive

Capacitive

Inductive

Capacitive

Generated

Power

Consumed

Power

Figure 14: Measurement and Compensation at the four quadrants�

In addition to the basic functions of any regulator, the Computer SMART III :

 Performs the functions of a network analyzer, measuring and viewing multiple parameters.

 Has a Plug&Play function for automatic configuration of the device.

 Has an AutoTest and manual test function for testing the status of the capacitors of the capacitor bank.

 Has an FCP system, which minimises the number of connections and disconnections of the relays.

 Supports step forcing.

 Can work with various connection types.

 Measures leakage current with the option of associating an alarm and conducting a search and cancellation of the faulty capacitor.

 Has multiple alarms, for warning of possible faults, whether in the capacitor bank or in the installation.



4�1�- DEFINITIONS

This section provides a number of definitions that may be useful for understanding the operation of the device.

4�1�1� Four-quadrant regulator

The regulator is capable of performing the measurement and regulation functions when the active power is transferred from the mains to the loads (common case in a consumer installation) or when the load is transferred to the mains (in the case of installations with generators that not only allow the consumption of energy, but can also export and sell energy).

4�1�2� Stages and steps

A distinction must be established between stages and steps. In this manual, a Stage is described as each group of capacitor banks into which the power factor compensation device is divided, which may have different power ratings, usually in ratios of 1:1, 1:2, 1:2:4, etc.

A step is each one of the total power fractions (power of the first step) that can be regulated by using stages with different weights.

4�1�3� FCP system (FAST Computerized Program)

This system controls the connection sequence of the various stages, tending to minimise the number of operations and to match the usage times of the various stages in order to achieve a pre-determined required final power. The operations are carried out such that, in the case of stages with identical power, the stage that has been disconnected the longest is connected when there is demand and the stage that has been connected the longest is disconnected when there is a surplus.

4�1�4� Regulation program

The power ratings of the various groups or stages usually follow certain patterns called "programs”.

The program indicates the power ratios between the various stages. The most frequent programs are:

Program 1�1�1�1 . All stages have the same power. For example : a 100 kvar unit with 5 steps would be made up of 5 identical 20 kvar stages, and would be described as a (5 x 20) kvar unit.

Program 1�2�2�2 . Every stage after the first stage has twice as much power as the first stage. For example : a 180 kvar unit with 5 stages would be made up of a first 20 kvar stage and 4 identical 40 kvar stages, and would be described as a (20 + 4 x 40) kvar unit.

Program 1�2�4�4 . The second stage has twice as much power as the first stage and the remaining stages after the second stage have four times as much power as the first stage. For example : a 300 kvar unit with 5 stages would be made up of a first 20 kvar stage, a second 40 kvar stage and 3 identical 80 kvar stages. It would be described as a (20 + 40 + 3 x 80) kvar unit.

Other Programs . Other programs can be used, such as 1.2.2.4, 1.2.4.8, 1.1.2.2, etc. The meaning of the numbers, as can be deduced from the preceding cases, gives the power ratio between the first stage, which receives a value of 1, and the subsequent stages (2 means twice as much power, 4 means four times as much power, etc.).


26


The device can be used to configure programs from 1.1.1.1 to 1.9.9.9.

4�1�5� Plug and Play

When a reactive energy regulator is installed, a series of parameters need to be configured in order to ensure that it operates correctly. Some of these parameters might be difficult to discover, for example such as the voltage phases or the correspondence between measured current and its voltage, as well as the current transformer ratio. The Computer SMART III includes an automatic process which intelligently works out necessary parameters such as:

 Connection type: detects the connection type used from among the possible options: 3U .

3C ,

3U .

1C and 2U .

1C .

 Phase: identifies the correspondence between the voltages and the currents connected, regardless of the connection type detected previously.

 Number of stages installed and program: sequentially connects all the stages to work out how many stages are installed and calculates the program, in other words the power ratio between the capacitors.

 C/K: calculates the ratio between the current transformer and the power of the smallest step.

4�1�6� Connection time (Ton) and reclosing time (Trec)

Connection time, Ton , defines the shortest possible time between changes in the status of the stages, in other words, between connections and disconnections. Therefore, the configuration of this parameter has a direct impact on the compensation speed, in other words, on the capacity for monitoring load changes. Setting a shorter connection time improves the power factor correction when the load can change quickly.

However, a shorter Ton will lead to a higher number of connections per time unit, possibly shortening the useful life of the associated components (contactors, capacitors). To assess the number of connections, Computer SMART III uses individual meters for each stage.

Reclosing time, Trec, is the shortest possible time between disconnecting a stage and reclosing it. This time is necessary for the capacitor to discharge enough so that, when it is reclosed, it does not cause overcurrents in the system.

4�1�7� THD and harmonics

Non-linear loads, such as those in rectifiers, inverters, speed drives, kilns, etc., absorb non-sinusoidal periodic currents from the mains. These currents are made up of a fundamental component with a frequency of 50 or 60 Hz, plus a series of overlapping currents, with frequencies that are multiples of the fundamental frequency; these are defined as harmonics. The result is a deformation of the current and, thus, of the voltage, which leads to a series of related side effects (conductor overload, circuit breakers and machines, phase offsets, interferences in electronic units, RCCB trips, etc.).

The level of harmonics is usually measured with the total harmonic distortion rate (THD), which is the ratio, usually as a %, of the RMS value of the harmonic content and the value of the fundamental component.



4�2�- MEASUREMENT PARAMETERS

The device displays the following electrical parameters:

4�2�1� Connection type: 3U .

3C

Table 4: Computer SMART III measurement parameters (

3U .

3C connection )

Parameter Units

Phases

L1-L2-L3

N

Total

III

Phase-neutral voltage V  

Phase-phase voltage

Current

Leakage current

Frequency

Active Power

Apparent Power

Total Reactive Power

Inductive Reactive Power

Capacitive Reactive Power

Power factor

Cos φ

Voltage THD %

Current THD %

Harmonic Breakdown - Voltage

(up to the 17th harmonic)

Harmonic Breakdown - Current


Active Energy

Inductive Reactive Energy

Capacitive Reactive Energy

Apparent energy

Temperature

No. of operations

Total activated power

(1) Displays maximum value.

(2) Displays minimum value.

V

A mA

Hz

M/kW

M/kVA

M/kvar

M/kvarL

M/kvarC

PF

φ

% THD V

% THD A harm V harm A

M/kWh

M/kvarLh

M/kvarCh

M/kVAh

ºC

( x 1000 )

%





 (L1)

























































Max (1)































Min (2)




























28



1C


3U .

1C connection )

Parameter Units

Phases

L1-L2-L3

N

Total

III

Phase-neutral voltage V  

Phase-phase voltage

Current

Leakage current

Frequency

Active Power

Apparent Power




Power factor

Cos φ

Voltage THD %

Current THD %





Active Energy



Apparent energy

Temperature

No. of operations




V

A mA

Hz

M/kW

M/kVA

M/kvar

M/kvarL

M/kvarC

PF

φ

% THD V


M/kWh

M/kvarLh

M/kvarCh

M/kVAh

ºC

( x 1000 )

%



 (L1)

 (L1)



 (L1)



 (L1)

































Max (3)































Min (4)






























1C


2U.1C

connection )

Parameter Units

Phases

L1-L2-L3

N

Total

III

Phase-neutral voltage V

 (L1-L2) Phase-phase voltage

Current

Leakage current

Frequency

Active Power

Apparent Power




Power factor

Cos φ

Voltage THD %

Current THD %





Active Energy



Apparent energy

Temperature

No. of operations




V

A mA

Hz

M/kW

M/kVA

M/kvar

M/kvarL

M/kvarC

PF

φ

% THD V


M/kWh

M/kvarLh

M/kvarCh

M/kVAh

ºC

( x 1000 )

%

 (L1)

 (L1)

 (L1-L2)

 (L1)

 (L1-L2)

 (L1)































Max (5) Min (6)






















































30


4�3�- KEYBOARD FUNCTIONS

The Computer SMART III has 5 keys that can be used to browse between the various screens and program the device.

Keys functions on the measurement screens (

Table 7

):

Key

Table 7: Keys functions on the measurement screens�

Short keystroke Long keystroke (3 s)

Previous screen -

Next screen -

View minimum value Delete minimum values

View maximum value

Next parameter

Very long keystroke (10 s�)

Enter the Test screens

Delete maximum values

Enter the programming menu

Note: See “4.6.1. MEASUREMENT STATUS” for further details.

Keys functions on the Configuration and Test screens, query mode (

Table 8

):

Key

Table 8: Keys functions on the Configuration and Test screens, query mode�

Short keystroke Long keystroke (3 s)

Previous screen

Next screen

Test: Manual connection of the selected capacitor

Test: Manual disconnection of the selected capacitor

Previous parameter

Next parameter

Configuration: Edit mode

Test: Start AutoTest

Very long keystroke (10 s�)

Exit the Test screens

Test: Cancel the AutoTest process

Note: See

“4.6.2. TEST STATUS”

and

“5.- CONFIGURATION”

for further details.



Keys functions on the Configuration and Test screens, edit mode (

Table 9 ):

Table 9: Keys functions on the Configuration and Test screens, edit mode�

Key Short keystroke

Increase the value or show the next option.

Reduce the value or show the previous option.

Previous configuration parameter

Next configuration parameter

Exit Edit mode

Note: See

“4.6.2. TEST STATUS”

and

“5.- CONFIGURATION”

for further details.


32


4�4�- DISPLAY

The device has a backlit LCD display. The display is divided into four areas ( Figure 15 ):

Analogue bar

3 4

Status of the capacitors

Status of the device

Data area

Figure 15: Areas of the Computer SMART III display�

 The data area: displays the instantaneous, maximum and minimum values of each one of the phases which the device is measuring or calculating.

 Status of the capacitors: displays the status of the relays of the device.

 Status of the device: displays the current status of the device.

 Analogue bar: configurable, shows the current, current THD or connected power of the capacitor bank as a %.



4�4�1� STATUS OF THE CAPACITORS

Status of the capacitors

Analogue bar

3 4

Figure 16: Status of the capacitors�

This area shows the status of the relays (stages) of the device, and thus of the capacitors connected to it.

The possible states are:

 Nothing is displayed if the stage is not connected and configured as AUTO .

 The icon is displayed if the stage is connected and configured as AUTO .

Status of the device

Data area

 The icon is displayed with the bottom bar steady if the stage is connected and configured as On .

 The icon is displayed with the bottom bar flashing if the stage is connected and configured as On NC .

 Only the steady bottom bar is displayed if the stage is disconnected and configured as OFF.

 Only the flashing bottom bar is displayed if the stage is cancelled by the leakage current alarm, E15 .

In the setup menu (

“5.14.- STATUS OF THE STAGES”

) the status of the stages is selected from the following options:

 AUTO : The status of the stage depends on the operation performed by the device.

 On : Stage forced to ON, always connected.

 OFF : Stage forced to OFF, always disconnected.

 On NC : Stage forced to ON, always connected but the system does not take into account its connected power.

By default, all the stages are configured as AUTO .

4�4�2� STATUS OF THE DEVICE

This area displays the status of the device in accordance with the following icons:

The device is in measurement and regulation mode.

The device does not measure or regulate.

Indicates that you are in the setup menu.

Indicates that you are in the test menu.

Indicates that, within the setup menu, you are in edit mode.

Indicates that you are viewing the instantaneous value.

Indicates that you are viewing the maximum value.

Indicates that you are viewing the minimum value.


34


4�4�3� ANALOGUE BAR

Figure 17: Analogue Bar

This bar is displayed on the measurement screens, and can show:

 the current of each phase as a %.

 the current THD of each phase.

 the power connected to the capacitor bank.

The parameter to be displayed is selected in the setup menu. (

“5.16.- ANALOGUE BAR”

)

The display screen also shows the results of the TEST and the load % of the capacitors.

4�4�4� OTHER SYMBOLS OF THE DISPLAY

The display also shows the following:

Alarm : When the device detects an alarm, the backlight of the screen flashes and the alarm icon lights up. The cause of the alarm can be seen on the active alarms screen. (

“4.6.- OPERATING

STATES”

)

Target cosine : The icons indicate which one of the four possible target cosines have been selected. (

“5.3.- TARGET COS φ

” )

Editing locked / unlocked: The editing of the programming parameters is password protected. These icons indicate whether or not this option is locked.



4�5�- LED INDICATORS

The Computer SMART III device comprises:

 A CPU LED: Indicates that the device is working properly by flashing once per second.

 An Alarm LED: Indicates that an alarm is activated.

 A Fan LED: Indicates that the fan is operating.

 A Key pressed LED: Lights up when any of the five keys are pressed.

CPU

Fan

Alarm

Key pressed

Figure 18:LED indicators of the Computer SMART III�


36


4�6�OPERATING STATES

The Computer SMART III has two operating states with the display screens matching the selected status:

 Measurement status,

 Test status, ,

,

4�6�1� MEASUREMENT STATUS

This status is identified by the

symbol in the device status area of the display ( Figure 15 ).

It is the normal operating status of the Computer SMART III, in which the device measures the various grid parameters and acts according to the configured parameters, connecting or disconnecting the capacitors from the capacitor bank.

Use keys and to browse the various screens.

Note: If the hysteresis of the target cos φ is activated, the symbol every 5 seconds.

flashes on the display screens

Delete maximum values:

On the maximum value display screen, press the

Delete minimum values:

On the minimum value display screen, press the

key for more than 3 seconds.

key for more than 3 seconds.

If 5 minutes pass without any keys being pressed, the device returns to the main screen.

The display screens vary according to the connection type of the installation.

4�6�1�1� 3U � 3C Connection (3 Voltages + Neutral and 3 currents)

Main Screen Parameters

Active Power III (kW or MW)

Reactive Power III (kvar or Mvar)

Cos φ

L: Inductive / C: capacitive

+: consumed / -: generated

Phase - Phase Voltage III (V or kV)

Display the minimum values.

Display the maximum values.

Press the key to switch to the Currents screen.



Phase - Neutral Voltages

Phase - Phase Voltages

Currents

Parameters

L1 Phase - Neutral Voltage (V or kV)



Phase - Neutral Voltage III (V or kV)



Parameters

L1 Phase - Phase Voltage (V or kV)






Parameters

L1 Current (A)

L2 Current (A)

L3 Current (A)

N Current (A)



Press the or key to switch to the Cosine φ screen.


38

Cosine φ


Parameters

L1 Cos φ

L2 Cos φ

L3 Cos φ

Cos φ III


+: Consumed / -: generated



Press the key to switch to the Energy III consumed screen.

Power Factor Parameters

L1

L2

Power Factor

Power Factor

L3 Power Factor

Power Factor III


+: Consumed / -: generated



Power III Parameters


Inductive Reactive Power III (kvarL or MvarL)

Capacitive Reactive Power III (kvarC or MvarC)

Apparent Power III (kVA or MVA)





Active Power

Inductive Reactive Power

Capacitive Reactive Power

Parameters

L1 Active power (kW or MW)






Parameters

L1 Inductive Reactive Power



Inductive Reactive Power III

(kvarL or MvarL)



Parameters

L1 Capacitive Reactive Power



Capacitive Reactive Power III

(kvarC or MvarC)




40

Apparent Power


Parameters

L1

L2

Apparent Power

Apparent Power

L3 Apparent Power

Apparent Power III

(kVA or MVA)



Leakage current / Frequency / Temperature Parameters

Leakage current (mA)

Frequency (Hz)

Temperature (ºC)



Voltage THD Parameters

L1 Voltage THD

L2 Voltage THD

L3 Voltage THD

(%)




Voltage harmonics

Current THD

Current harmonics

Parameters

L1 Voltage harmonic



(%)

Change the harmonic no.:

3, 5, 7, 9, 11, 13, 15, 17.


Parameters

L1 Current THD

L2 Current THD

L3 Current THD

(%)


Parameters

L1 Current harmonic



(%)


3, 5, 7, 9, 11, 13, 15, 17.



Energy III consumed


Parameters

Active Energy III consumed

(kWh or MWh)

Inductive Reactive Energy III consumed

(kvarLh or MvarLh)

Capacitive Reactive Energy III consumed

(kvarCh or MvarCh)

Apparent Energy III consumed

(kVAh or MVAh)

Press the key to switch to the Main screen.

Energy III generated Parameters

Active Energy III generated

(kWh or MWh)

Inductive Reactive Energy III generated

(kvarLh or MvarLh)

Capacitive Reactive Energy III generated

(kvarCh or MvarCh)

Apparent Energy III generated

(kVAh or MVAh)

Operations Parameters

No� of operations of stage C1 to C14

Three screens show the number of operations of the 14 possible stages.

for more than 3 seconds: delete the no. of operations.

42

This parameter should be associated with an alarm that is activated when the number of operations exceeds a pre-determined value (for example, 5000 operations) in order to perform the maintenance of this stage.



Active alarms Parameters

Active alarm code E01 to E017

(Table 10

)

If there are more than 4 alarms, the information is scrolled on the screen.

Code

E01

E02

E03

E04

E05

E06

E07

E08*

E09*

E10*

Table 10: Alarm codes�

Description

No current� The load current is lower than the minimum value or some of the current transformers (CT) are not connected.

It is activated when the secondary current of the transformer is lower than 50 mA in some of the phases.

The device disconnects the capacitors automatically.

Overcompensation . The device measures capacitive power but all the stages are disconnected.

This can be due to an incorrect adjustment of the C/K parameter.

In order to avoid possible false actions, this alarm has a predefined delay of 90 seconds.

Undercompensation . The device measures inductive power but all the stages are connected.

This can be due to an incorrect adjustment of the C/K parameter.


Overcurrent . The measured current exceeds the nominal current by + 20 % in some of the phases. The nominal current is considered to be that of the CT primary.


Overvoltage . The voltage measured in some of the phases exceeds the configured voltage

(Vp-n).



Low voltage . The voltage in some of the phases is lower than the configured voltage (Vp-n).



Cos φ high or low alarm� The three-phase cos φ is outside the limits specified in one of the

Cos φ alarms (high or low). Also, the measured currents should be higher than the configured threshold.


Voltage THD Alarm . The Voltage THD levels in some of the phases are higher than those configured in the Voltage THD alarm.

Current x I THD Alarm . The IxITHD levels in some of the phases are higher than those configured in the IxITHD alarm. (IxITHD refers to the multiplication of the current by the ITHD of the same current, see

“5.26.- CURRENT x I THD ALARM”

)

Temperature Alarm . The measured temperature is higher than that configured in the Temperature alarm.

E11 No Connection Status due to E08 , E09 or E10 .


44


Code

Table 10 (Continuation): Alarm codes�

Description

E12 Disconnection Status due to E08 , E09 or E10 .

E13

Leakage Alarm . The leakage current is higher than that configured in the

Leakage Current alarm.

E14

E15

E16

E17

Repeated Leakage Alarm . Leakages have been detected repeatedly in the system,but they are not caused by a capacitor.

Leakage in Capacitors Alarm . Leakages have been detected, which were caused by some of the capacitors, and this stage is disabled. The disabled capacitors will start to flash on the screen. In addition, the E13 message will be displayed.

In order to enable these capacitors again, view the configuration of the Leakage alarm.

Leakage transformer detection Alarm� The Leakage alarm has been enabled, but the device does not detect the connection of the leakage current transformer.

Number of connections alarm� The configured number of operations has been exceeded (any capacitor)

* In these alarms, two levels have been configured:

 The Lo value: When the device exceeds this value during 30 minutes, the corresponding alarm is triggered and, if alarm E11 is enabled, the Computer SMART III device enters the No

Connection status and activates alarm E11 .

 The HI value: if the device exceeds this value during 30 seconds, the corresponding alarm is triggered and, if alarm E12 is enabled, the Computer SMART III device enters the Disconnection status and activates alarm E12 .

If the device falls back under the Lo value during 10 minutes, it deactivates the alarms and returns to the normal operating status.

In the No Connection status, the device does not connect the stages, but also does not disconnect them if the operation requires it.

In the Disconnection status, it disconnects the stages and does not allow them to connect.



4�6�1�2� 3U � 1C Connection (3 Voltages + Neutral and 1 current)




+: inductive / -: capacitive

Cos φ







Phase - Neutral Voltages Parameters




Phase - Neutral Voltage III (V or kV)



Phase - Phase Voltages Parameters








46

Currents Parameters


Current (A)




Cosine φ Parameters

Cos φ







Power factor
















Frequency (Hz)

Temperature (ºC)




L1 Voltage THD

L2 Voltage THD

L3 Voltage THD

(%)



48


Current THD


Parameters




(%)


3, 5, 7, 9, 11, 13, 15, 17.


Parameters

Current THD (%)


Current harmonics Parameters

Current harmonic (%)


3, 5, 7, 9, 11, 13, 15, 17.




Energy III consumed Parameters


(kWh or MWh)


(kvarLh or MvarLh)


(kvarCh or MvarCh)


(kVAh or MVAh)




(kWh or MWh)


(kvarLh or MvarLh)


(kvarCh or MvarCh)


(kVAh or MVAh)







50




( Table 10).


4�6�1�3� 2U � 1C Connection (2 Voltages and 1 current)




+: inductive / -: capacitive

Cos φ



Phase - Phase Voltage (V or kV)




Phase - Phase Voltages Parameters

Phase - Phase Voltage (V or kV)





Currents Parameters

Current (A)




Cosine φ Parameters

Cos φ







Power factor






52











Frequency (Hz)

Temperature (ºC)




Voltage THD (%)





Current THD

Parameters

Voltage harmonic (%)


3, 5, 7, 9, 11, 13, 15, 17.


Parameters

Current THD (%)


Current harmonics Parameters

Current harmonic (%)


3, 5, 7, 9, 11, 13, 15, 17.



Energy III consumed


Parameters


(kWh or MWh)


(kvarLh or MvarLh)


(kvarCh or MvarCh)


(kVAh or MVAh)




(kWh or MWh)


(kvarLh or MvarLh)


(kvarCh or MvarCh)


(kVAh or MVAh)





54






( Table 10 )


4�6�2� TEST STATUS

This status is identified by the symbol in the device status area of the display (

Figure 15

).

The stages can be connected and disconnected manually, and the measured parameters that relate to each one of the stages can be displayed. It also comprises the AutoTest function, which scans and calculates all the stages of the device.

key in any of the measurement screens causes the A very long keystroke (> 10s) of the device to enter the Test status.

A very long keystroke (> 10s) of the to the Measurement status.

key in any of the Test screens causes the device to return

Use keys and to browse the various screens.

If 5 minutes pass without any keys being pressed, the device returns to the main screen.

Disconnection screen Parameters

Transition screen: used for the device to disconnect all the stages automatically before entering the Test status.

While in this screen, the device does not respond to the keypad.

The device automatically exits this screen, and this can take a certain amount of time.


AutoTest Parameters


AutoTest home screen.

To start the AutoTest:

Press the key, OFF flashes.

Press the key to switch from OFF to START

Press the key to start the AutoTest

56

Once the AutoTest has started, the results of the capacitors that are connected and disconnected are shown:



(kvarC or MvarC)

Capacitive Power % of each capacitor relative to the total estimated value�

The icon flashes during the AutoTest.

A long keystroke (> 3 s) of the key cancels the AutoTest.

At the end of the AutoTest, the device automatically returns to the Individual Test screen.

Step Test Parameters



(kvarC or MvarC)

Capacitive Power % of each capacitor relative to the total estimated value� capacitors.

Switches between the various

A long keystroke (> 3 s) of the key connects the capacitor that is being displayed, taking into account the programmed connection and reclosing times.

A long keystroke (> 3 s) of the key disconnects the capacitor that is being displayed, taking into account the programmed connection and reclosing times.



Cosine φ Test

Current THD Test

Power III Test

Parameters

Display screen of the:

Cos φ ( 2U .

1C and 3U .

1C connection)

L1 Cos φ ( 3U.3C

connection)

L2 Cos φ ( 3U.3C

connection)

L3 Cos φ ( 3U.3C

connection)

Cos φ III ( 3U.3C

connection)



Parameters


Current THD ( 2U.1C

and 3U.1C

connection)

L1 Current THD ( 3U.3C

connection)


connection)


connection)

Parameters



Inductive Reactive Power III

(kvarL or MvarL)

Capacitive Reactive Power III

(kvarC or MvarC)



58


4�7�- INPUTS

The Computer SMART III comprises two digital inputs (terminals 31 and 32 of

Figure 2

) for activating any of the four target cos φ , in other words, the desired power factor for the installation, which can be programmed in the device. See

“5.3.- TARGET COS φ

”

On the display, the

Digital input 2

Table 11: Selection of the target cos φ �

Digital Input 1

0 0

0 1

1

1 0

1

Target cos φ

1

2

3

4

icon indicates which of the four possible target cosines was selected.

4�8�- OUTPUTS

The device features:



A relay (terminals 37 and 38 of Figure 2 ) dedicated to activating a fan when a pre-determined

temperature is exceeded, which can be programmed in

“5.17.- FAN”

, also connected to the Fan

LED.



A fully programmable alarm relay (terminals 39, 40 and 41 of Figure 2

); see

“5.21.- ENABLING

ALARMS”



Two digital outputs, optoisolated NPN transistors (terminals 34, 35 and 36 of Figure 2 ), fully

programmable; see

“5.21.- ENABLING ALARMS”.

Computer SMART III 6 model:

 Six output relays (terminals 15 to 21 of

Figure 2 ) for regulating the cos

φ by means of capacitors.




Twelve output relays (terminals 15 to 27 of Figure 2

) for regulating the cos φ by means of capacitors.


 Fourteen output relays (terminals 15 to 27 and 42 to 44 of

Figure 2

) for regulating the cos φ by means of capacitors.



4�9�- COMMUNICATIONS

Computer SMART III devices have an RS-485 serial communication output with the Modbus RTU ® communications protocol.

4�9�1� CONNECTIONS

The RS -485 cable should be wired with a twisted pair cable with mesh shield (minimum 3 wires), with a maximum distance between the Computer SMART III and the master device of 1200 metres.

A maximum of 32 Computer SMART III devices can be connected to this bus.

Use an intelligent RS-232 to RS-485 network protocol converter (M54020 intelligent converter) to establish the communications with the master device. This converter does away with the need for the

Pin 7 connection on the RS-485 side.

PC

RS-232 / USB / Ethernet / Profibus ...

RS-232

USB

Ethernet

Profibus

...

RS-485

RS-485

A ( + )

B ( - )

S

A( + )

B( - )

S

Figure 19: RS-485 Connection diagram


60


4�9�2� PROTOCOL

The Modbus protocol is an industry communication standard which enables networking of multiple devices, with one master and several slaves. It allows individual master-slave dialogue and also enables commands in broadcast format.

In the Modbus protocol, the Computer SMART III device uses the RTU (Remote Terminal Unit) mode.

In the RTU mode, the message start and end are detected with silences of at least 3.5 characters, and the 16-bit CRC error-detection method is used.

The Modbus functions implemented in the device are as follows:

Function 01 . Reading the status of the relays.

Functions 03 and 04 . Reading logs.

Function 05 . Writing a relay.

Function 0F . Writing multiple relays.

Function 10 . Writing multiple logs.

Exception codes

If the bit with greatest weight of the byte corresponding to the function in the reply of the device is

1, this indicates that the next byte is an exception code.

Exception code

01

02

03

04

06

Table 12: Exception codes, Modbus communications�

Description

Incorrect function. The function number is not implemented.

Incorrect address or number of logs out of limits

Data error. A CRC error has occurred

Peripheral error. An error occurred when accessing a peripheral (EEPROM, card, etc.)

Slave error or Slave busy. Retry sending.

Example:

Address

0A

Function

84

Exception code

01

Address: 0A , Peripheral number: 10 in decimal.

Function: 84 , Reading function 04 with bit no. 7 at 1.

Exception code: 01 , see

Table 10�

CRC: 16-bit CRC.

CRC

XXXX

For reasons of operational security of the device, communication frames of more than 80 bytes are not accepted (sent or received).



4�9�3� MODBUS MEMORY MAP

A .- Measurement Variables

For these variables Function 04 is implemented: reading logs.

The Modbus addresses of all the tables are hexadecimal.

Table 13: Modbus memory map: measurement variables (Table 1)

Parameter

L1 phase voltage

L1 Current

L1 Active Power

L1 Inductive Reactive Power

Instantaneous Maximum Minimum

00-01 200-201 300-301

02-03

04-05

06-07

202-203

204-205

206-207

302-303

304-305

306-307

L1 Capacitive Reactive Power

L1 Reactive Power

L1 Apparent Power

08-09

0A-0B

0C-0D

208-209

20A-20B

20C-20D

308-309

30A-30B

30C-30D

L1 Reactive Power Consumed

L1 Reactive Power Generated

L1 Power Factor (7)

L1 Cos φ (7)

L1 kW sign (7)

0E-0F

10-11

12-13

14-15

16-17

18-19

20E-20F

210-211

212-213

214-215

-

-

30E-30F

310-311

312-313

314-315

-

L1 kvar sign (7)

L2 phase voltage

L2 Current

L2 Active Power



L2 Reactive Power

L2 Apparent Power




L2 Cos φ (7)

L2 kW sign (7)


1A-1B

1C-1D

1E-1F

20-21

22-23

24-25

26-27

28-29

2A-2B

2C-2D

2E-2F

30-31

32-33

34-35

21A-21B

21C-21D

21E-21F

220-221

222-223

224-225

226-227

228-229

22A-22B

22C-22D

22E-22F

-

-

234-235

31A-31B

31C-31D

31E-31F

320-321

322-323

324-325

326-327

328-329

32A-32B

32C-32D

32E-32F

-

-

334-335 L3 phase voltage

L3 Current

L3 Active Power



L3 Reactive Power

L3 Apparent Power

36-37

38-39

3A-3B

3C-3D

3E-3F

40-41

236-237

238-239

23A-23B

23C-23D

23E-23F

240-241

336-337

338-339

33A-33B

33C-33D

33E-33F

340-341




L3 Cos φ (7)

L3 kW sign (7)

42-43

44-45

46-47

48-49

4A-4B

242-243

244-245

246-247

248-249

-

342-343

344-345

346-347

348-349

-

V/100 mA

W varL varC var

VA var var

-

-

+1 or -1

+1 or -1

V/100

Units

V/100 mA

W varL varC var

VA var var

-

-

+1 or -1

+1 or -1 mA

W varL varC var

VA var var

-

-

+1 or -1


62


Parameter


L3-L1 Voltage

Neutral Current

Leakage Current

Table 13 (Continuation): Modbus memory map: measurement variables (Table 1)

Three-phase phase voltage

Three-phase current

Three-phase active power

Three-phase inductive power

Three-phase capacitive power

Three-phase reactive power

Three-phase apparent power

Three-phase reactive power consumed

Three-phase reactive power generated

Three-phase power factor

Three-phase cos φ (7)

Three-phase kW sign (7)

Three-phase kvar sign (7)

Frequency

L1-L2 Voltage

L2-L3 Voltage

Temperature

L1 voltage THD %

L2 voltage THD %

L3 voltage THD %

L1 current THD %

L2 current THD %

(7)

L3 current THD %

Active energy consumed kWh

Active energy consumed Wh

Inductive energy consumed kvarLh

Inductive energy consumed varLh

Capacitive energy consumed kvarCh

Capacitive energy consumed varCh

Apparent energy consumed kVAh

Apparent energy consumed VAh

Active energy generated kWh

Active energy generated Wh

Inductive energy generated kvarLh

Inductive energy generated varLh

Capacitive energy generated kvarCh

Instantaneous

4C-4D

4E-4F

50-51

52-53

54-55

56-57

58-59

5A-5B

5C-5D

5E-5F

60-61

62-63

64-65

66-67

68-69

6A-6B

6C-6D

6E-6F

70-71

72-73

74-75

7C-7D

7E-7F

80-81

82-83

84-85

86-87

88-89

8A-8B

8C-8D

8E-8F

90-91

92-93

94-95

96-97

98-99

9A-9B

9C-9D

9E-9F

A0-A1

Maximum

-

24E-24F

250-251

252-253

254-255

256-257

258-259

25A-25B

25C-25D

25E-25F

260-261

262-263

-

-

268-269

26A-26B

26C-26D

26E-26F

270-271

272-273

274-275

27C-27D

27E-27F

280-281

282-283

284-285

286-287

-

-

-

-

-

-

-

-

--

-

-

-

-

Minimum

-

34E-34F

350-351

352-353

354-355

356-357

358-359

35A-35B

35C-35D

35E-35F

360-361

362-363

-

-

368-369

36A-36B

36C-36D

36E-36F

370-371

372-373

374-375

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Units

+1 or -1

V/100 mA

W varL varC var

VA var var

-

-

-

-

Hz/10

V/100

V/100

V/100 mA mA

ºC/10

%

%

%

%

%

% kWh

Wh kvarLh varLh kvarCh varCh kVAh

VAh kWh

Wh kvarLh varLh kvarCh

Capacitive energy generated varCh

Apparent energy generated kVAh

A2-A3

A4-A5

-

-

-

varCh kVAh

Apparent energy generated VAh A6-A7 VAh

(7) The cos φ and Power factor parameters are accompanied by the kW sign and kva sign parameters, which are used to determine the quadrant in which each phase is being measured. See

Figure 20 .


Inductive

Capacitive


Generated

Power

Consumed

Power

Inductive

Capacitive

Inductive

Capacitive

Inductive

Capacitive

Generated

Power

Consumed

Power

Figure 20: Diagram of the four measurement and compensation quadrants�

Table 14:Modbus memory map: measurement variables (Table 2)

Parameter

L1 Fundamental Voltage Harmonic

L1 Voltage Harmonics

Instantaneous

400-401

402-415

Maximum

484-485

486-499





L1 Fundamental Current Harmonic

L1 Current Harmonics





416-417

418-42B

42C-42D

42E-441

442-443

444-457

458-459

45A-46D

46E-46F

470-483

49A-49B

49C-4AF

4B0-4B1

4B2-4C5

4C6-4C7

4C8-4DB

4DC-4DD

4DE-4F1

4F2-4F3

4F4-507

Table 15:Modbus memory map: measurement variables (Table 3)

Parameter

Relay variable

Instantaneous

600

Alarm variable

Status of the outputs

Status of the digital inputs

No. of connections, of each of the 14 relays

(6 in the Computer SMART III 6 model,

12 in the Computer SMART III 12 model,)

605-606

610

615

625-63E mA

% / 10 mA

% / 10 mA

% / 10

Units

V/100

% / 10

V/100

% / 10

V/100

% / 10


64


 Relay variable

Shows the status of the 14 ( Computer SMART III 14 model), 12 ( Computer SMART III 12 model) or 6

( Computer SMART III 6 model) output relays.

It is a 16-bit variable in which each bit indicates the status of a relay.

Bit

15-14

-

Bit

13

14

Bit

12

13

Bit

11

12

Bit

10

11

Bit

9

10

Bit

8

9

Bit

7

8

Bit

6

7

Bit

5

6

Bit

4

5

Bit

3

4 Relay

Where 0 : relay disconnected (OFF).

1 : relay connected (ON).

 Alarm Variable

Shows the status of the 17 possible alarms.

It is a 32-bit variable in which each bit indicates the status of an alarm.

Bit

2

3

Bit

1

2

Bit

0

1

Bit

15

Bit

14

Bit

13

Bit

12

Bit

11

Bit

10

Bit

9

Bit

8

Bit

7

Bit

6

Bit

5

Bit

4

Bit

3

Bit

2

Bit

1

Bit

0

E16 E15 E14 E13 E12 E11 E10 E09 E08 E07 E06 E05 E04 E03 E02 E01

Bit

32

-

Bit

31

-

Bit

30

-

Bit

29

-

Bit

28

-

Bit

27

-

Bit

26

-

Bit

25

-

Bit

24

-

Bit

23

-

Bit

22

-

Bit

21

-

Bit

20

-

Bit

19

-

Bit

18

Bit

16

E17

Where 0 : alarm off (OFF).

1 : alarm active (ON).

 Status of the outputs

Shows the status of the 4 outputs: Fan relay, alarm relay and the two digital outputs.

It is a 16-bit variable in which each bit indicates the status of an output.

Bit 15 to 4

-

-

Bit 3 Bit 2 Bit 1

Digital output 2 Digital output 1 Alarm relay

1: OFF

0: ON

1: OFF

0: ON

1: ON

0: OFF

 Status of the digital inputs

Shows the status of the 2 digital inputs.

It is a 16-bit variable in which each bit indicates the status of an input.

Bit 0

Fan relay

1: ON

0: OFF

Bit 15 to 2

-

-

Bit 1

Digital input 2

1: ON

0: OFF

Bit 0

Digital input 1

1: ON

0: OFF



B .- Programming variables

The following functions are implemented for these variables:

Function 04 : reading logs.

Function 10 : Writing multiple logs.

Table 16:Modbus memory map: programming variables (Table 1)

Device parameters

Configuration variable

Serial number (8)

Frame number (8)

Version (8)

Hardware log (8)

(8) The parameters of the device have only implemented function 04 .

Address

1000-1003

1010-1013

1020-1021

1030-1033


Communications


Peripheral no.

Speed

Address

1071

1072

Valid data window

1 to 254

0 (9600), 1 (19200)

Parity

Length

Stop bits

1073

1074

1075

0 (none), 1 (odd), 2 (even)

0 (8 bits), 1 (7 bits)

0 (1 bits), 1 (2 bits)


Transformation ratios


Current primary

Current secondary

Address

1090

1091


1 - 10000

0 (1 A), 1 (5 A)

Voltage primary

Voltage secondary

1095-1096

1097-1098

1 - 99999

1 - 99999


Connection type


Connection type

Address

1100


0 (3U.3C), 1 (3U.1C), 2 (2U.1C)

Phase (9) 1101 1 to 6 (

Table 42 )

Current 1

Current 2

Current 3

(9)(10)

(9)(10)

(9)(10)

1102

1103

1104

1 (Phase 1 direct), 2 (Phase 2 direct),

3 (Phase 3 direct),

4 (Phase 1 reverse),



(9) Only used when the connection type is other than 3U.3C.

(10) Indicates the relationship between the assigned voltage and the current direction.

Default value

1

1

0

0

0

Default value

5

1

400

400

Default value

0

1

1

2

3

Example: If you see Current 1 = 1, Current 2 = 5 and Current 3 = 3, this means that:

Current 1 is assigned to voltage 1 in the direct direction, current 2 is assigned to voltage 2 in the reverse direction and current 3 is assigned to voltage 3 in the direct direction.


66


C5

C6

C7

C8

C9

C10

C11

C12

C13

C14

C2

C3

C4

Status of the stages


C1


Address

1110

1111

1112

1113


1114

1115

1116

1117

1118

1119

111A

111B

111C

111D

0 (Auto),

1 (On),

2 (OFF),

3 (OnNc)

Voltage level


Voltage level


Address

1121


0 (Low voltage)

1 (Medium/High voltage)


Display


Lighting (Backlight)

Light level

Language

Advanced setup

Analogue bar

Address

1125

1126

1127

1128

1129


0 (Comes on when pressing a key)

1 (ON), 2 (OFF)

0 -10 (Value % / 10)

0 (Spanish), 1 (English), 2(French),

3 (Turkish)

0 (OFF), 1 (ON)

0 (No), 1 (Current), 2 (ITHD)

3 (Connected power)


Target cos φ


Target cos φ 1

Target cos φ 2

Target cos φ 3

Target cos φ 4

Target cos φ 1 type




Address

1130

1131

1132

1133

1134

1135

1136

1137


50 - 100 (Value x 100)

0 (Capacitive)

1 (Inductive)

Default value

0

Default value

100

100

100

100

1

1

1

1

0

0

0

0

0

0

0

Default value

0

0

0

0

0

0

0

Default value

0

7

0

0

0



Table 24: Modbus memory map: programming variables (Table 9)

Capacitive and Inductive Hysteresis

Configuration variable Address Valid data window

Capacitive hysteresis

Inductive hysteresis

1185

1186

0 -10 ( Value x 100)


C/K factor


C/K factor

Address

1138


0 - 100 (Value x 100)


Program


Program

Address

1139


1111-1999


No� of stages

Configuration variable Address

No. of stages 113B


0-6 ( Computer SMART III 6 )




Connection and reclosing time


Connection time

Reclosing time

Address

113C

113D


0-999 seconds

0-999 seconds

Alarm: Voltage THD


Low Value

Hi Value


Address

1140

1141


0 - 100 %

0 - 100 %


Alarm: Current x I THD


Low Value

Hi Value

Address

1142

1143


0 ... 9999 A

0 ... 9999 A


Alarm: Temperature

Configuration variable Address Valid data window

Low Value

Hi Value

1144

1145

0 - 80 ºC

0 - 80 ºC


Alarm: Leakage Current


Search for the responsible stage

Address

1146


0 (OFF), 1 (ON)

Value

Stages enabled

1147

1148

10 - 1000 mA

0 (No), 1 (Yes)

Default value

0

Default value

100

Default value

1111

Default value

4

5

Default value

65

70

Default value

0

300

0

Default value

6

12

14

Default value

10

50

Default value

5

8


68



Alarm: Cos φ low


Values of Cos φ low

Address

1149


50 - 100 (Value x 100)

Current value

Type of Cos φ

114A

114B

0 - 9999 A

1 (Inductive)


Alarm: Cos φ high


Values of Cos φ high

Current value

Type of Cos φ

Address

118A

118B

118C


50 - 100 (Value x 100)

0 - 9999 A

0 (Capacitive)

Alarm: Fan


Value

Enabled


Address

114C

114D


0 - 80 ºC

0 (OFF), 1 (ON)


Alarm: Voltage


Overvoltage value

No Voltage Value

Address

114E-114F

1150-1151


0-99999

0-99999


No� of operations


No. of operations

Address

1152-1153


1-99999


Undervoltage trip


Cut-off voltage threshold

Address

1190


0-100 %

Enabling alarms


Enable Alarm E01

Enable Alarm E02

Enable Alarm E03


Address

1155

1156

1157


Enable Alarm E04

Enable Alarm E05

1158

1159

Enable Alarm E06

Enable Alarm E07

Enable Alarm E08

Enable Alarm E09

Enable Alarm E10

Enable Alarm E11

Enable Alarm E12

115A

115B

115C

115D

115E

115F

1160

0 (OFF), 1 (ON)

Default value

95

20

1

Default value

98

20

0

Default value

35

0

Default value

440

360

Default value

5000

Default value

80

Default value

1

1

1

1

0

1

1

1

1

0

0

0



Table 39 (Continuation): Modbus memory map: programming variables (Table 24)

Enabling alarms


Enable Alarm E13

Address

1161


Enable Alarm E14

Enable Alarm E15

1162

1163

Enable Alarm E16

Enable Alarm E17

Output associated with Alarm E01




1164

1165

1170

1171

1172

1173










1174

1175

1176

1177

1179

1179

117A

117B

117C

0 (No),

1 (Alarm relay),

2 (Digital output 1)

2 (Digital output 2)





C .- Deleting parameters

117D

117E

117F

1180

0

0

0

0

0

0

0

0

0

Default value

0

0

0

0

0

0

0

0

0

0

0

0

0

Parameters can be deleted using Function 05 : writing a relay.

Table 40:Modbus memory map: deleting parameters

Deleting parameters

Action

Deleting maximum values

Deleting minimum values

Deleting maximum and minimum values

Deleting energies

Deleting the stage search and stage enabling values of the leakage current alarm

Deleting the no. of operations of all the relays

Resetting alarms E14 and E15

Restoring the default configuration values

Address Value to be sent

200 FF

210 FF

220

230

240

250

260

300

FF

FF

FF

FF

FF

FF


70


4�9�4� EXAMPLE OF A MODBUS QUERY

Query: Instantaneous value of the L1 phase voltage

Address

0A

Function

04

Initial log

0000

No� of logs

0002

CRC

70B0

Response:

Address: 0A , Peripheral number: 10 in decimal.

Function: 04 , Read function.

Initial Log: 0000 , log from which to start reading.

No� of logs: 0002 , number of logs to be read.

CRC: 70B0 , CRC character.

Address

0A

Function

04

No� of Bytes

04

Log no� 1

0000

Log no� 2

084D

Address: 0A , Responding peripheral number: 10 in decimal.

Function: 04 , Read function.

No� of bytes: 04 , No. of bytes received.

Log: 0000084D , value of the L1 phase voltage: VL1 x 10: 212.5 V

CRC: 8621 , CRC character.

CRC

8621



5.- CONFIGURATION

The various configuration parameters of the device can be consulted and edited in the device setup menu.

The device always keeps the capacitors disconnected (except in the Plug&Play function).

This status is identified by the symbol in the device status area of the display (

Figure 15

).

To access the setup menu, long keystroke the key (> 3 s).

The Password screen appears on the display. The password to be entered is a combination of keys:

. It is unique and cannot be configured.

If it is not entered correctly, the device returns to the previous measurement screen.

If it is entered correctly and capacitors are connected, the disconnection screen appears.

Disconnection screen: used for the device to automatically disconnect all the stages before entering the configuration.

While in this screen, the device does not respond to the keypad.

The device automatically exits this screen, and this can take a certain amount of time.



5�1�PLUG&PLAY

The Plug&Play function assists the user during the configuration of the device, since it automatically configures the basic parameters that are required for the device to perform its regulation functions correctly.

To start the Plug&Play process, press the key.

The process enters edit mode. This is identified by the the display.

symbol and the flashing of the digits of

72

Press the key to switch from OFF to START

Press the key to start the Plug&Play function. Once started, the device undertakes a process of connecting and disconnecting capacitors, measurement and calculation in order to obtain the following parameters of the capacitor bank:

 Connection type,

 Phase,

 Number of steps.

 Program

 C/K factor,

These parameters can also be configured manually from their respective screens.

When the Plug&Play process of the device is active, this screen is displayed with the flashing (it may take several minutes).

symbol

The capacitors are connected and disconnected during the process and this will be displayed on the screen.



Once the Plug&Play function of the device ends, if no errors occurred during the process, the results are shown by the display on two screens, as follows:

Connection type:

3U.3C

: 3 voltages and 3 currents �

3U.1C

: 3 voltages and 1 current �

2U�1U: 2 voltages and 1 current �

Phase

Cos φ III



Press the key to switch to the next screen of results.

Press the key to exit the results screen.

No� steps detected

Program

C/K factor

Cos φ III



Press the key to switch to the previous screen of results.

Press the key to exit the results screen.

If any errors occur during the execution of the Plug&Play function, the process will be aborted and the errors will be displayed on the screen. When a parameter has been calculated correctly before the error is detected, it will be displayed on the previously assigned line. The errors that can occur in the

Plug&Play function are shown in Table 41 .

Code

P00

P01

Table 41: Code of Plug&Play errors�

Description

There are three possible causes that can prevent the Plug&Play process from starting:

- Some stages are cancelled by the leakage current alarm.

- Some stages are forced in the configuration

“5.14.- STATUS OF THE STAGES”

�

- The reclosing time is longer than 280 seconds.

Error when searching for the Connection Type. See connection diagrams.


74


Code

P06

P07

P08

P09

P02

P03

P04

P05

Table 41 (Continuation): Code of Plug&Play errors�

Description

Phase not found. Cosine out of range (between 0.62 and 0.99 inductive).

Unstable measurement. Load changes during the process.

Error in the measurement of the largest capacitor.

No capacitors found.

Incorrect measurement of the number of capacitors.

Incorrect measurement of the ratio of the first capacitor.

Possible error in the program calculated.

C/K out of range.

In the event of a P00 error, in other words, if some capacitors are cancelled by the leakage current alarm, forced in the configuration or have a reclosing time of more than 280 seconds, the Plug&Play function is not executed until the problem is solved.

The Plug&Play function is designed to assist with the installation of the reactive energy compensation system, with the initial configuration of the regulator or when there are changes in the system (new regulator, new cabling, new stage, etc.). For this reason, it is necessary prior to the Plug&Play function to solve the possible problems with faulty capacitors by means of maintenance or replacement, as well as to configure all the stages in Auto mode, as they come by default.

Conditions for the correct operation of the Plug&Play function:

 The system should be maintained with an inductive cosine of 0.62 to 0.99 throughout the process.

 The power in the system should be stable. Any major load changes (>10 % in less than 20 seconds) would result in an incorrect calculation of the capacitor power ratings.

 There must be enough current in the system, above 100 mA AC at the input of the regulator.

 If the load is unbalanced, the correct operation of the Plug&Play function will depend on the phase to which the current transformer is connected.

Once the Plug&Play function is finished, the primary of the current transformer needs to be configured in order for the device to measure the current and the powers correctly.

Press the key to move on to the next configuration point.

If no keys are pressed for 5 minutes, the device switches to the simulation screen,

“5.30.- SIMULATION

SCREEN”

.



5�2�- CURRENT TRANSFORMATION RATIO

The primary and secondary value of the current transformer is configured in this point.

Press the key to enter edit mode. It is identified by the digits to be modified.

symbol and the flashing of the

The key increases the digit value or shows the next option.

The key reduces the digit value or shows the previous option.

The key skips to the previous digit and the key skips to the next digit.

Press to validate the data; the symbol disappears from the display.

Current primary:

Maximum

Minimum

Current secondary:

Maximum possible current ratio: 2500.

Note: The current ratio is the ratio between the current primary and secondary.

Maximum value of the current ratio x the voltage ratio: 200000.

If the value entered is lower than the minimum value or higher than the maximum value, the backlight of the display flashes and the value entered is replaced with the minimum or maximum value, or with the last value validated.

Press the key to access the next programming step.



SCREEN”

.



5�3�- TARGET COS φ

The cos φ makes it possible to define the power factor required for the installation. The Computer

SMART III device inserts the number of capacitors required in order to get as close to this target value as possible. Since the regulation is by stages, it does not perform any operations until the uncompensated demand is at least 70 % of the power of the smallest stage or the compensation surplus is 70 % of the power of the smallest stage.

76

Four target cosines can be configured. According to the status of the digital inputs ( see

“4.7.- INPUTS”

) the device admits one of the 4 programmed cosines.

For every cosine, the value is programmed as is the option of being inductive L or capacitive C .




The key reduces the digit value or shows the previous option.


Press to validate the data; the

Maximum value: 1.00.

Minimum value: 0.50.

symbol disappears from the display.





SCREEN”

.



5�4�- CONNECTION AND RECLOSING TIME

In this point the action times of the device are configured in seconds:

Ton is the minimum time between the connection and disconnection of a single stage.

TREC is the maximum time between the disconnection and connection of a single stage.

TREC must be greater than

ToN

; ideally, it should be 5 times greater.



The key increases the digit value.

The key reduces the digit value.

The

Press

key skips to the previous digit and the

to validate the data; the

key skips to the next digit.


Ton :

Maximum value: 999.

Minimum value: 4.

Trec :

Maximum value: 999.

Minimum value: 20.





SCREEN”

.


5�5�- CONNECTION TYPE

In this point the connection type of the installation is selected, where:

3u3C : 3 voltages + neutral and 3 currents.

3u1C : 3 voltages + neutral and 1 current.

2u1C : 2 voltages and 1 current.


78


The key shows the next option and the


key shows the previous option.





SCREEN”

.

5�6�- PHASE CONNECTION

This parameter is used to adapt the device to the various options for connecting the power supply and measurement cables and the current transformers to the phases of the three-phase system.

The connection screen changes according to the connection type programmed in the preceding point.

 Connection type 3u1C or 2u1C

If a connection with a single current has been selected (

phases indicated in Table 42 are selected in this screen.

3u1C or 2u1C ) , one of the 6 possible

The selection of one or another of the options must be made when inductive reactive power with an inductive cos φ of 0.6 to 1 is being consumed in the installation at the time of adjustment. The various options are tried until the screen shows a cos φ of 0.6 to 1 (the display of the cos φ is only informative, not editable).





The key shows the next option and the key shows the previous option.


Press the


key to access the next programming step.



SCREEN ”

.

Phases

Table 42:Phase connection options�

V measurement phase CT connection phase

PH1 L1-L2-L3 L1

PH2 L1-L2-L3 L2

PH3 L1-L2-L3 L3

PH4 L1-L2-L3 L1 (inverted transformer)



 Connection type 3u3C

If the connection with three currents has been selected ( 3u3C ) , each current is associated with its voltage and the direction of the current is indicated in this screen.

d : direct.

i : reverse.





The key shows the next option.

The key shows the previous option.

The key skips to the previous voltage and the key skips to the next voltage.


Press the





SCREEN”

.

5�7�- NO� OF STAGES

In this point the number of stages is selected, in other words the number of relay outputs that the device will have. According to the model, Computer SMART III 6 , SMART III 12 or SMART III 14 , it can be configured with up to 6 or up to 12 outputs.

80








Press the



If no keys are pressed for 5 minutes, the device switches to the simulation screen, “

5.30.- SIMULATION

SCREEN

” .

5�8�- PROGRAM

The device is made up of stages with different powers. The base power (value 1) will be that of the stage with the lowest power. The powers of all the other stages will depend on the power of the first stage.

Example:

Program 1�1�1�1 , all the stages have the same power as the first one.

Program 1�2�4�4 , the second stage has twice the power and the next ones have four times the power of the first one. ( See

“4.1.4. REGULATION PROGRAM”

)

When configuring the program, remember that the subsequent stage cannot be lower than the prior stage, and that the first stage is always 1.







Minimum value: 1.1.1.1

Maximum value: 1.9.9.9




SCREEN”

.


82


5�9�- C/K FACTOR

The C/K factor is adjusted according to the reactive current provided by the smallest stage, measured in the secondary of the current transformer (CT). The adjustment value of this factor therefore depends on the power of the smallest stage, the ratio of the CTs and the network voltage.

Table 43 and Table 44 provide the values to which the C/K should be adjusted for a 400 V AC network

between phases, various transformer ratios and powers of the smallest stage.

CT Ratio

(Ip / Is)

150/5

200/5

250/5

300/5

400/5

500/5

600/5

800/5

1000/5

1500/5

2000/5

2500/5

3000/5

4000/5

Table 43: C/K factor (table 1)�

Power of the smallest stage at 400 V (in kvar)

2�5 5�0 7�5 10�0 12�5 15�0 20�0 25�0 30�0 40�0 50�0 60�0 75�0 80�0

0.12 0.24 0.36 0.48 0.60 0.72 0.96

0.09 0.18 0.27 0.36 0.45 0.54 0.72 0.90

0.07 0.14 0.22 0.29 0.36 0.43 0.58 0.72 0.87

0.06 0.12 0.18 0.24 0.30 0.36 0.48 0.60 0.72 0.96

0.05 0.09 0.14 0.18 0.23 0.24 0.36 0.48 0.58 0.72 0.87

0.07 0.11 0.14 0.18 0.22 0.29 0.36 0.45 0.54 0.72

0.87

0.06 0.09 0.12 0.15 0.18 0.24 0.30 0.36 0.48 0.60

0.72

0.90 0.96

0.07 0.09 0.11 0.14 0.18 0.23 0.27 0.36 0.45

0.54

0.68 0.72

0.05 0.07 0.09 0.11 0.14 0.18 0.22 0.29 0.36

0.43

0.54 0.57

0.05 0.06 0.07 0.10 0.12 0.14 0.19 0.24

0.29

0.36 0.38

0.05 0.07 0.09 0.11 0.14 0.18

0.22

0.27 0.28

0.06 0.07 0.09 0.12 0.14

0.17

0.22 0.23

0.05 0.06 0.07 0.10 0.12

0.14

0.18 0.19

0.05 0.07 0.09

0.11

0.14 0.14

If the capacitor power reference of 440 V is used for a 400 V network voltage, the table is Table 44�

Table 44:C/K factor (table 2)�

CT Ratio

(Ip / Is)

Power of the smallest stage at 440 V (in kvar)

2�5 5�0 7�5 10�0 12�5 15�0 20�0 25�0 30�0 40�0 50�0 60�0 75�0 80�0

150/5 0.09 0.18 0.27 0.36 0.45 0.54 0.72 0.90

200/5 0.07 0.14 0.20 0.27 0.34 0.41 0.54 0.68 0.81

250/5 0.05 0.11 0.16 0.22 0.27 0.33 0.43 0.54 0.65 0.87

300/5 0.05 0.09 0.14 0.18 0.23 0.27 0.36 0.45 0.54 0.72 0.90

0.07 0.10 0.14 0.17 0.20 0.27 0.34 0.41 0.54 0.68

0.81

400/5

500/5

600/5

0.05 0.08 0.11 0.14 0.16 0.22 0.27 0.33 0.43 0.54

0.05 0.07 0.09 0.11 0.14 0.18 0.23 0.27 0.36 0.45

0.65

0.54

0.81 0.87

0.68 0.72

800/5

1000/5

1500/5

2000/5

2500/5

3000/5

4000/5

0.05 0.07 0.08 0.10 0.14 0.17 0.20 0.27 0.34

0.04 0.05 0.07 0.08 0.11 0.14 0.16 0.22 0.27

0.04 0.05 0.05 0.07 0.09 0.11 0.14 0.18

0.04 0.05 0.07 0.08 0.11 0.14

0.04 0.05 0.07 0.09 0.11

0.04 0.05 0.05 0.07 0.09

0.04 0.05 0.07

0.41

0.33

0.22

0.16

0.13

0.11

0.08

0.51 0.54

0.41 0.43

0.27 0.29

0.20 0.22

0.16 0.17

0.14 0.14

0.10 0.11



For other voltages or conditions not included in the table, the value of C/K can be obtained by means of a simple calculation.

 Calculating the C/K Factor

The equation for calculating the C/K factor is:

C / K =

I

C

K where , Ic

K

: is the smallest capacitor current.

: the current transformer transformation ratio.

=

3 ⋅

Q

K ⋅ V

To calculate voltage V .

Ic it is necessary to know the reactive power of the smallest capacitor Q and the network

I

C

=

Q

3 .

V

The transformation ratio K is calculated as:

K = I prim

/ I sec where, Iprim : is the nominal current of the transformer primary.

Isec : is the current of the transformer secondary.

Example: In a 400 V device the smallest capacitor is of 60 kvar with a current transformer having a ratio of 500/5, and the calculation would be made as follows:

Current of the smallest capacitor, Ic:

I

C

=

60000

3 ⋅ 400

= 86 , 6 A

K Factor K = 500 / 5 = 100

The C/K value is: 0.866

.

If the power of 60 kvar is referenced at 440 V, it should be multiplied by Vred 2 /440 2, in which case the C/K value of the previous example would be 0.72

.

If the C/K is configured lower than the actual value, connections and disconnections would occur continuously with few load variations (the system performs more operations than necessary).

If the C/K is configured higher, the regulator requires a higher demand for reactive power in order to switch and perform fewer operations.





84

The key skips to the previous digit.

The key skips to the next digit.

The key increases the digit value and the key reduces the digit value.


Minimum value: 0.02

Maximum value: 1.0






SCREEN”

.

5�10�- VOLTAGE LEVEL

In this point the voltage level of the device is selected. There are two possible options:

L o uu

.

U : Low voltage

Hi gh .

U : High voltage



When the high-voltage option is selected, the device will have some of its functions disabled. The disabled functions are:







The Plug&Play process cannot be carried out.

The AutoTest process cannot be carried out.

The leakage current is not measured and the related alarms cannot be enabled.






Press the





SCREEN”

.

5�11�- EXPERT SETUP

In this point it is possible to decide whether to access the expert setup menu.

If the YES option is selected, the next programming step will be the voltage transformation ratio

(

“5.12.- VOLTAGE TRANSFORMATION RATIO”

)

When the No

PLUG&PLAY”

) option is selected, the display returns to the Plug&Play configuration screen (

“5.1.-








Press the key to access the next programming step



SCREEN”

.

5�12�- VOLTAGE TRANSFORMATION RATIO

In this point the primary and secondary value of the voltage transformer can be configured.



86





Voltage primary:

Maximum

Minimum

Voltage secondary:

Maximum

Minimum

Maximum possible voltage ratio: 1000.

Note: The voltage ratio is the ratio between the voltage primary and secondary.

Maximum value of the current ratio x the voltage ratio: 200000.




“ 5.30.- SIMULATION

SCREEN”

.



5�13�- HYSTERESIS

The L (inductive) and C (capacitive) hysteresis values of the target cos φ are specified in this section.

As long as the cos φ is within this range, the device does not connect any paths, but it can disconnect them.

The configuration of the hysteresis affects the four target cos φ specified.

Note: If the hysteresis is activated on the display screens, the symbol flashes every 5 seconds.




The key reduces the digit value or shows the next option.



Maximum value: 0.10.

Minimum value: 0.00.






SCREEN”

.



5�14�- STATUS OF THE STAGES

This parameter is repeated for each of the 6, 12 or 14 possible stages, offering the opportunity to force their status without paying attention to the operation performed by the actual device.

In order to identify which of the 14 stages is being configured, the screen shows C1 , C2 , etc.

88

The configuration options for each stage are as follows:

 AUTO : The status of the stage depends on the operation performed by the device.

 On : Stage forced to ON, always connected.

 OFF : Stage forced to OFF, always disconnected.

 On NC : Stage forced to ON, always connected but the system does not take into account its connected power.

By default, all the stages are configured as AUTO .

On the measurement screens, the forced states of the stages are shown by activating the bottom line of the capacitor status bar. (

“4.4.1. STATUS OF THE CAPACITORS”

)





The key skips to the previous stage.

The key skips to the next stage.


Press the





SCREEN”

.



5�15�- DISPLAY

In this point the lighting status of the screen and its language can be configured.



The following display configuration options are available:

 ON : the display light is always on.

 OFF : the light is always off.

 AUTO : the light comes on when a key is pressed and switches off when no keys have been pressed for 5 minutes.

The light level is also configured between 0 % and 100 % when the display is on.

The display language options are as follows:

 ESP : Spanish, EnG : English, FrA : French, Tr : Turkish.



The

The

key skips to the next parameter.



Press the





SCREEN”

.



5�16�- ANALOGUE BAR

In this point the parameter to be displayed in the analogue bar (

“4.4.3. ANALOGUE BAR”

) can be configured.



90

The following display options are available for the analogue bar:

 POTC : the percentage of power connected to the capacitor bank relative to the total power.

 THdI : the Current THD of each phase.

 I : the current % of each one of the phases.

 nO : no parameters are displayed.







SCREEN ”

.

5�17�- FAN

In this point the activation of the relay output associated with the fan can be configured.

It is possible to configure whether or it is enabled which it is to be activated or deactivated.

ON or not OFF , as well as the temperature above

The device has a hysteresis value of 5ºC when disconnecting the fan, in order to avoid continuous connections and disconnections.






The key skips to the previous parameter and the




Maximum value: 80ºC.

Minimum value: 0ºC.






SCREEN”

.

5�18�- UNDERVOLTAGE TRIP

At this point we configure the voltage threshold over which the undervoltage trip function acts. This function disables all the steps enabled in the event of any measured phase-phase voltages presenting a value below the configured threshold. It will not enable them again until the measured phase-phase voltages do not exceed the threshold.


92




The voltage threshold is programmed as a percentage of the configured primary voltage’s value (“ 5.12.-

VOLTAGE TRANSFORMATION RATIO ”).



The key skips to the previous parameter and the key skips to the next parameter.


Maximum value: 0 %.

Minimum value: 100 %.


Note: If 0% is programmed, the functionality is disabled.

Note: The value displayed in the fourth row (0 in the image) is not editable and indicates the number of times that the Undervoltage trip function has been activated. This value is reset each time the value is reconfigured.




SCREEN”

.



5�19�- COMMUNICATIONS

In this point the RS-485 communication parameters can be configured.

symbol and the flashing of the Press the key to enter edit mode. It is identified by the digits to be modified.

The parameters to be configured are:

The peripheral number assigned, from 1 to 254.

The transmission speed , BaudRate: 9600 or 19200.

The parity :

 none : no parity.

 Even : even parity.

 Odd : odd parity.

The number of stop bits : 1 or 2



The key skips to the previous digit or the previous parameter.

The key skips to the next digit or the next parameter.






SCREEN”

.


94


5�20�- CLEAR

In this point it is possible to configure whether or not to delete ( YES or minimum values, the energies and the number of connections of the stages.

No ) the maximum and


The following parameters can be deleted:

 n : maximum and minimum values.

 E : energies.

 C : number of connections of the stages.



The key skips to the previous parameter and the key skips to the next parameter.


Press the





SCREEN”

.



5�21�- ENABLING ALARMS

This screen is repeated for every type of Error or Alarm (from with the activation of a relay or a digital output.

E01 to E17 ); see

Table 10�

In it the enabling or disabling of each error or alarm can be configured, as can whether or not to associate it

The key skips to the previous error.

The key skips to the next error.




Enabling ON or disabling OFF the error or alarm.

Association with a relay or digital output alarm:

 reLe : the activation of the alarm is associated with the alarm relay.

 d1 : the activation of the alarm is associated with digital output 1.

 d2 : the activation of the alarm is associated with digital output 2.

 no : not associated with any relay or digital output.



The

Press

key skips to the previous parameter and the

to validate the data; the






SCREEN”

.



5�22�- VOLTAGE ALARMS

In this point the phase-phase voltage thresholds above which the overvoltage alarm ( E05 ) and the no voltage alarm ( E06 ) should be triggered can be configured.

Note: The alarm must be enabled (

“5.21.- ENABLING ALARMS”

).

96



In order to avoid possible false activations of said alarms, they have a predefined delay of 5 seconds.


HI �

The value of the no voltage alarm: LO �

When any of the two alarms are triggered, the device enters the Disconnection status and disconnects all the stages. The device does not return to its normal operating status until the cause for the alarm disappears.





Overvoltage alarm:

Maximum

Minimum

No voltage alarm:

Maximum

Minimum 0 V







SCREEN”

.

5�23�- COS φ LOW ALARM

In this point the lower limit for action of the cos φ alarm can be configured. It is activated every time the value of the cos φ drops below the configured value and the current is higher than programmed.



).





The cos φ value , it is inductive L .





Current:

Maximum value:

Minimum value:

9999 A

0 A


cos φ :

Maximum value: 1.00

Minimum value: 0.50







SCREEN”

.

5�24�- COS φ HIGH ALARM

The high limit of the cos φ alarm is set at this point. This is activated whenever the value of cos φ is above the specified value and the current is higher than the programmed value.



).

98




The cos φ value , it is capacitive C .





Current:

Maximum value:

Minimum value:

9999 A

0 A



Computer SMART III cos φ :

Maximum value: 1.00

Minimum value: 0.50





SCREEN”

.

5�25�- VOLTAGE THD ALARM

In this point the thresholds above which the Voltage THD alarm (



).

E08 ) is activated can be configured.

The programmed values are useful for the 3 phases which the device measures.




 The Lo value : when the device exceeds this value for 30 minutes, alarm E08 is triggered, and if alarm E11 is enabled, the Computer SMART III device enters the No Connection status and activates alarm E11 .

 The HI value: if the device exceeds this value for 30 seconds, alarm E08 is triggered, and if alarm E12 is enabled, the Computer SMART III device enters the Disconnection status and activates alarm E12 .

If the device falls back under the to the normal operating status.

Lo value during 10 minutes, it deactivates the alarms and returns




In the Disconnection status, it disconnects the stages and does not allow them to connect.





Lo Value and HI Value:

Maximum value: 99 %

Minimum value: 1 %





SCREEN”

.

5�26�- CURRENT x I THD ALARM

In this point the thresholds above which the alarm for the % of the value of the current x ITHD ( measures.



).

E09 ) is activated can be configured. The programmed values are useful for the 3 phases which the device

100





The value to be programmed in this alarm corresponds directly to the value of the total harmonic current to be considered as the setpoint. For example: If you want to program a Lo setpoint value when exceeding a harmonic current of 200 A measured by the regulator, program 00200 directly in this section.


 The Lo value: when the device exceeds this value for 30 minutes, alarm E09 is triggered, and if alarm E11 is enabled

,

the Computer SMART III device enters the No Connection status and activates alarm E11 .





In the Disconnection status, it disconnects all the stages and does not allow them to connect.






Maximum value: 9999.

Minimum value: 1






SCREEN ”

.



5�27�- TEMPERATURE ALARM

In this point the thresholds above which the temperature alarm (



).

E10 ) is activated can be configured.

102




 The Lo value: when the device exceeds this value for 30 minutes, alarm E09 is triggered, and if alarm E11 is enabled , the Computer SMART III device enters the No Connection status and activates alarm E11 .





In the Disconnection status, it disconnects all the stages and does not allow them to connect.







Maximum value: 80ºC.

Minimum value: 0ºC







SCREEN”

.

5�28�- LEAKAGE CURRENT ALARM

In this point the parameters of the leakage current alarm can be configured. Four alarms are linked to the leakage current ( E13 , E14 , E15 and E16 ).



).




 The alarm value: when the device exceeds this value, alarm E13 is triggered.

 Search for the responsible stage: if this parameter is programmed as ON , the device performs a process of connecting and disconnecting all the stages in order to find which ones are responsible for the leakage and, once they have been detected, cancels them so that they cannot connect again. The device triggers alarms intermittently displayed on the screen.

E13 and E15 and the disabled stages are

 Enable stages: in this parameter, the stages that were disabled by this alarm are enabled again ( YES option).

The key increases the digit value and the next option.

The key reduces the digit value and the previous option.





Maximum value: 999 mA.

Minimum value: 1 mA.






SCREEN”

.

5�29�- NO� OF OPERATIONS ALARM

In this point the number of operations of any of the stages above which the alarm triggered can be configured.



).

E17 will be

104






Maximum value: 99999.

Minimum value: 10.








SCREEN”

.

5�30�- SIMULATION SCREEN

This screen can be accessed by pressing the key for more than 3 seconds, in order to exit the configuration status. This is an informative, non-editable screen.

The simulation screen provides certain information, which can be used to decide to enter the measurement status when pressing the key during 3 seconds or if no keys are pressed during 5 minutes, or to return to the configuration screens when pressing any of the other keys.

The screen shows the following information:

 Measurement of the cos φ .

 Three-phase reactive power.

 The word STOP , as a reminder that the device is still not in the measurement status.

 Simulation of the steps that would be connected upon entering the measurement status and of the analogue bar.


106


6.- TECHNICAL FEATURES

Rated voltage

Frequency

Consumption maximum

Installation category

AC power supply

Computer SMART III 6

100 ... 520 V ~


100 ... 520 V ~

50 ... 60 Hz


10 ... 16 VA


13 ... 20 VA

CAT III 300 V


100 ... 400 V ~


14 ... 18 VA

Rated voltage (Un)

Voltage measurement margin

Frequency measurement margin

Input impedance

Minimum measurement voltage (Vstart)

Installation category

Voltage measurement circuit

230 V Ph-N , 400 V Ph-Ph

20 ... 300 V Ph-N , 35 ... 520 V Ph-Ph

45 ... 65 Hz

660 kΩ

20 V Ph-N , 35 V Ph-Ph

CAT III 300 V

Nominal current (In)

Current measurement margin

Minimum measurement current (Istart)

Current measurement circuit

.../5 A or .../1 A

1 ...120 % In

50 mA

Leakage current measurement circuit

By means of an earth leakage transformer with a ratio of 500 turns

Nominal current of the secondary 3 mA

Current measurement margin

Minimum measurement current (Istart)

10 mA ... 1.5 A

10 mA

Voltage measurement

Current measurement

Active power measurement

Reactive power measurement

Active energy measurement

Reactive energy measurement

Measurement accuracy (UNE-EN 61557-12)

0.5 % ± 1 digit

0.5 % ± 1 digit

0.5% ± 2 digits

1% ± 2 digits

Class 1

Class 2

Quantity

Type

Maximum voltage

Maximum current

Model

Pulse outputs

2

NPN

24 V

50 mA

Relay outputs

Computer SMART III 6 Computer SMART III 12

8 (6 outputs, 1 fan, 1 alarm)




Quantity

Maximum voltage, open contacts

Maximum current

Maximum switching power

1 kV

1 A

2500 VA



Electrical life

Mechanical working life

Quantity

Type

Insulation

Display

Keypad

LED

Field bus

Communication protocol

Baud rate

Stop bits

Parity

Operating temperature

Storage temperature

Relative humidity (non-condensing)

Maximum altitude

Protection degree

Dimensions (

Figure 21 )

Weight

Enclosure

Attachment

7 21.75

71

5.84

Relay outputs (Continuation)

30x10 3 cycles

5x10 6 cycles

Digital inputs

2

Potential-free contact optoisolated

User interface

Custom COG LCD

Capacitive, 5 keys

4 LEDs

Communications

RS-485

Modbus RTU

9600 - 19200

1 - 2 none - even - odd

Environmental features

-10ºC ... +55ºC

-20ºC ... +70ºC

5 ... 95 %

2000 m

IP31

Front panel: IP51

Mechanical features

144x144x78 mm

575 g

Self-extinguishing V0 plastic

Panel

144


Figure 21: Dimensions of the Computer SMART III�

107


Standards

Safety requirements for electrical equipment for measurement, control and laboratory use

Electromagnetic compatibility (EMC) Part 6-2: Generic standards Immunity for industrial environments

Electromagnetic compatibility (EMC) Part 6-4: Generic standards Emission standard for industrial environments

UNE-EN 61010:2010

UNE-EN 61000-6-2:2005

UNE-EN 61000-6-4:2005



7.- MAINTENANCE AND TECHNICAL SERVICE

In the case of any query in relation to device operation or malfunction, please contact the CIRCUTOR,

SA Technical Support Service.

Technical Assistance Service

Vial Sant Jordi, s/n, 08232 - Viladecavalls (Barcelona)

Tel: 902 449 459 ( España) / +34 937 452 919 (outside of Spain) email: [email protected]

8.- WARRANTY

CIRCUTOR guarantees its products against any manufacturing defect for two years after the delivery of the units.

CIRCUTOR will repair or replace any defective factory product returned during the guarantee period.

• No returns will be accepted and no unit will be repaired or replaced if it is not accompanied by a report indicating the defect detected or the reason for the return.

• The guarantee will be void if the units has been improperly used or the storage, installation and maintenance instructions listed in this manual have not been followed. “Improper usage” is defined as any operating or storage condition contrary to the national electrical code or that surpasses the limits indicated in the technical and environmental features of this manual.

• CIRCUTOR accepts no liability due to the possible damage to the unit or other parts of the installation, nor will it cover any possible sanctions derived from a possible failure, improper installation or “improper usage” of the unit. Consequently, this guarantee does not apply to failures occurring in the following cases:

- Overvoltages and/or electrical disturbances in the supply;

- Water, if the product does not have the appropriate IP classification;

- Poor ventilation and/or excessive temperatures;

- Improper installation and/or lack of maintenance;

- Buyer repairs or modifications without the manufacturer’s authorisation.


9.- CE CERTIFICATE









CIRCUTOR, SA

Vial Sant Jordi, s/n

08232 -Viladecavalls (Barcelona)

Tel.: (+34) 93 745 29 00 - Fax: (+34) 93 745 29 14

www.circutor.com [email protected]

Circutor cSMARTIII Smart power factor energy regulator Owner's Manual

REACTIVE ENERGY REGULATOR

Computer SMART III

INSTRUCTION MANUAL

TC

LOAD CAPACITORS

2U.1C

Status of the capacitors

Analogue bar

Status of the device

Data area

Related manuals

Table of contents

Circutor cSMARTIII Smart power factor energy regulator Owner's Manual

REACTIVE ENERGY REGULATOR

Computer SMART III

INSTRUCTION MANUAL

TC

LOAD CAPACITORS

2U.1C

Status of the capacitors

Analogue bar

Status of the device

Data area

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Table of contents