Service/Downloads/Documents/Data-sheets

ZES Sensors and Accessories

for precision power meters

LMG series 90/310/95/450/500

version:28. May 2014

ZES current and voltage sensors and accessories

This data book is the technical dokumentation of the current and voltage sensors from ZES

ZIMMER Electronic Systems GmbH to enlarge the measuring ranges of the power meters series LMG.

The first section of this paper gives an survey of all ZES current sensors and the safety precautions. Selection table and several arguments should help you to find a suitable sensor family or fill out the support request form. The second section is about the general current sensors, which you can use with every precision power meter of the LMG series. In the following sections the special sensors, wiring cables and accessories for the different precision power meters are described. Then you find a chapter with the precision high voltage divider for meters of the LMG series. The last section with frequently asked questions will help you to optimize the accuracy and give you some hints for the usage of our sensors.

But in all cases if you need more information or detailed support for your application please don’t hesitate to contact us, the engineers of ZES ZIMMER will help you.

© Copyright 2014. No part of this document may be reproduced, in any form or by any means, without the permission in writing from ZES ZIMMER Electronic Systems GmbH.

We reserve the right to implement technical changes at any time, particularly where these changes will improve the performance.

•

Headquarter Germany:

ZES ZIMMER Electronic Systems GmbH

Tabaksmühlenweg 30

D-61440 Oberursel (Taunus), Germany phone ++49 (0)6171 628750 fax ++49 (0)6171 52086 email: [email protected]

internet: http://www.zes.com

•

Subsidiary USA:

ZES ZIMMER Inc.

2850 Thornhills Ave. SE

Suite 114

Grand Rapids, MI 49546, USA phone +1 760 550 9371 email: [email protected]

internet: http://www.zes.com

ZES ZIMMER 2/96 Sensors and Accessories for precision power meters

Content

1 Introduction......................................................................................... 5

1.1 Safety precautions ....................................................................................... 5

2 Current sensors ................................................................................... 9

2.1 Active error compensated AC - current clamp 40A (LMG-Z406/-Z407) . 9

2.2 AC - current clamp 200A/0.2A (LMG-Z326) .......................................... 12

2.3 AC - current clamp 200A/1A (LMG-Z325) ............................................. 14

2.4 Error compensated AC - current clamp 1000A (L45-Z10/-Z11) ............. 16

2.5 DC - current clamp 1000A (L45-Z26)...................................................... 18

2.6 Error compensated AC - current clamp 3000A (L45-Z16/-Z17) ............. 20

2.7 Hall current sensors, 50/100/200A (L45-Z28-HALLxx) ......................... 23

2.8 Hall current sensors, 300/500/1k/2kA (L45-Z29-HALLxx).................... 26

2.9 Hall current sensors, 300/500/1k/2kA (L50-Z29-HALLxx).................... 30

2.10 Rogowski flex sensors (L45-Z32-FLEXxx)........................................... 33

2.11 Low current shunt (LMG-SHxx) ............................................................ 36

2.12 Low current shunt with overload protection (LMG-SHxx-P)................ 41

3 LMG95 connection cables and adapter ............................................ 47

3.1 Adapter for the use of HD15-Sensors with LMG95 (L95-Z07) .............. 47

3.2 PSU/PCT-K-L95 ....................................................................................... 49

4 LMG450 connection cables and adapter .......................................... 52

4.1 BNC adapter to sensor input HD15 without EEPROM (L45-Z09) ......... 52

4.2 Adapter for isolated custom current sensors with 1A output (L45-Z22). 53

5 LMG500 connection cables and adapter .......................................... 55

5.1 LMG500 current sensor adapter (L50-Z14) ............................................. 55

6 Accessories ....................................................................................... 57

6.1 Sensor supply unit for up to 4 current sensors (SSU4) ............................ 57

6.2 Adapter for incremental rotation speed encoders (L45-Z18)................... 63

6.3 Adapter for incremental rotation speed encoders (L50-Z18)................... 67

6.4 Synchronisation adapter with adjustable lowpass filter (L50-Z19) ......... 71

6.5 Ethernet Adapter (L95-Z318, L45-Z318, L50-Z318, LMG-Z318) .......... 73

6.6 USB-RS232 Adapter (LMG-Z316)........................................................... 79

7 Voltage sensors ................................................................................. 81

7.1 Precision high voltage divider (HST3/6/9/12) ......................................... 81

8 FAQ - frequently asked questions / Knowledge base ...................... 91

8.1 Example of an error calculation: general derivation ................................ 91


8.2 Example of an error calculation: LMG500 with external shunt............... 95

8.3 Example of an error calculation: LMG500 with HST3............................ 96


Introduction

1 Introduction

1.1 Safety precautions

The following precautions are recommended to insure your safety and to provide the best conditions for the instruments.

•

When using voltage or current transformers please regard the applicable safety standards

(earthing, isolation, ...)!

•

The installation of powermeter and current sensors may be accomplished only by trained technical personnel!

•

When operating the powermeter, current- and voltage sensors, certain parts can carry hazardous voltage (e.g. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage.

•

Read the user manual carefully and respect the safety precautions!

•

Do not use these products in medical-related or any other equipment that may have a potential effect on human lives.

•

Always observe the operating conditions and environmental requirements as indicated in this documentation when operating the product.

•

Do not exceed the maximum specified voltage or current or use outside its measurement category.

•

Always check the condition of the case and leads before use. Never operate the unit if it has a damaged cord or plug, if it is not working properly, or if it has been dropped or damaged or dropped into water.

•

Avoid severe impacts or rough handling that could damage the instrument.

Do not place any heavy object on the instrument.

•

Keep the instruments away from water and other liquids.

•

Use electrostatic discharge precautions while handling and making connections to the instrument.

•

Do not block or obstruct the ventilation openings.


Introduction

•

Use suitable connection cables. Different current sensors have unique connection cables for each different precision power meter LMG. For example: the connection cable between

PSU200 and LMG500 ‘PSU200-K-L50’ is neither suitable for PSU600 nor for LMG450.

•

To avoid the risk of electrical shock, do not disassemble or attempt to repair the unit.

Incorrect repair can cause risk of electrical shock or injury to persons when unit is used.

For all repairs please return the devices to your distributor or to ZES ZIMMER Electronic

Systems.

•

Do not touch energized circuits.

•

The power meter with its voltage and current sensors is not designed to detect hazards or similar! A wrong reading (e.g. by choosing a wrong filter or range) could give you the wrong impression of a safe state. Use appropriate tools instead of this instrument to detect dangerous situations.

1.1.1 Terms and symbols

These terms and symbols may appear in this manual or on the product.

Warning, risk of danger! Refer to the operating instructions before using the device.

In these operating instructions, failure to follow or carry out instructions preceded by this symbol may result in personal injury or damage to the device.

Caution, risk of electric shock

Earth (ground) terminal

Protective conductor terminal

Equipment protected throughout by double insulation or reinforced insulation.

Application around and removal from hazardous live conductors is permitted.

Do not apply around or remove from hazardous live conductors.


Introduction

This symbol indicates that this product is to be collected separately. This product is designated for separate collection at an appropriate collection point. Do not dispose of as household waste. For more information, contact the retailer or the local authorities in charge of waste management.

1.1.2 Definition of measurement categories

•

Measurement category IV corresponds to measurements taken at the source of low voltage installations.

•

Measurement category III corresponds to measurements on building installations.

•

Measurement category II corresponds to measurements taken on circuits directly connected to low voltage installations.

•

Measurement category I corresponds to measurements taken on circuits not directly connected to mains.


Current sensors

2 Current sensors

2.1 Active error compensated AC - current clamp 40A (LMG-Z406/-Z407)

(LMG-Z407 is a set of 4x LMG-Z406)

Figure 1: LMG-Z406/-Z407

Figure 2: Dimensions of the LMG-Z406/-Z407

2.1.1 Safety warning!

No safety isolation, measurements only at insulated conductors allowed!

Always connect the sensor first to the meter, and afterwards to the device under test.

Connecting cable without savety isolation! Avoid contact to hazardous voltage!

Please refer to chapter 1.1: ‘Safety precautions’!

2.1.2 Specifications

Nominal input current

Max. trms value

Measuring range current clamp

Maximum input, overload capability

Bandwidth

40A

80A

120Apk

500A for 1s

5Hz to 50kHz


Current sensors

Isolation

Degree of pollution

Temperature range

Weight

Output connection bare conductor: phase/ground 30Veff insulated conductor: see cable spec.

2

-10°C to +50°C

120g

HD15 (with EEPROM) for LMG sensor input

With its high basic accuracy, the lower cut-off frequency of 5Hz and the upper cut-off frequency of 50kHz this clamp fits best for measurements at frequency inverter output. The internal error compensation circuit is designed especial for this application.

2.1.3 Accuracy

Accuracies based on: sinusoidal current, ambient temperature 23±3°C, calibration interval 1 year, conductor in the middle of the clamp. The values are in

±

(% of measuring value + % of measuring range current clamp) and in ±(phase error in degree)

Influence of coupling mode: This current clamp can transfer only AC currents. The compensation circuit may cause a DC signal wich is interpreted by the instrument as a DC current. This could cause additional errors. Therefore this clamp should only be used with the

LMG setting: AC coupling. The accuracies are only valid for this case.

Frequency 5Hz to

10Hz

Current

10Hz to

45Hz

45Hz to

65Hz

65Hz to

1kHz

1kHz to

5kHz

5kHz to

20kHz

1.5+0.25 0.4+0.15 0.15+0.05 0.15+0.05 0.3+0.15

1+0.25

Phase 6 3 0.5

0.5

2 6

20kHz to

50kHz

4+0.5

20

Use LMG-Z406/-Z407 and LMG specifications to calculate the accuracy of the complete system.

2.1.4 Ordering guide

The current clamp LMG-Z406 is available in a package with 4 clamps, it is called LMG-Z407.

The standard connection length is 3m. Optionally can be ordered a custom defined length between 1m .. 10m.

2.1.5 Sensor operation without supply

It is important to assure a stable power supply of the sensor before switching on the load current! The operation of the sensor with load current and without supply will cause

damage of the sensor and/or of the LMG.


Current sensors

2.1.6 Connection of the sensor with LMG90/310

The use with LMG90 and LMG310 is not possible.

2.1.7 Connection of the sensor with LMG95

Use L95-Z07, internal supply via LMG and the Isensor/external shunt input. Set LMG current scaling factor appropriate to the scaling factor marked on the label on L95-Z07.


Use the sensor input, you get the following ranges: nominal value 1.25A

2.5A

5A 10A 20A 40A max. trms value 2.5A

5A 10A 20A 40A 80A max. peak value 3.75A

7.5A

15A 30A 60A 120A


Use L50-Z14, you get the following ranges: nominal value 0.3A

0.6A

1.25A

2.5A


1.25A

2.5A


1.88A

3.75A

7.5A

15A 30A 60A 120A


Current sensors

2.2 AC - current clamp 200A/0.2A (LMG-Z326)

Figure 3: LMG-Z326

Figure 4: Dimensions of the LMG-Z326







Transformation ratio

Measuring range

Maximum input

Bandwidth

Burden

Isolation

200A

1000:1

600A

600A for 3min

40Hz to 10kHz

1 to 10 ohms bare conductor: phase/ground 30Veff insulated conductor: see cable spec.


Current sensors

Degree of pollution

Temperature range

Weight

Output connection

2

-10°C to +50°C

105g

2 safety sockets for 4mm plugs

2.2.3 Accuracy

Accuracies based on: sinusoidal current, ambient temperature 23±3°C, calibration interval 1 year, conductor in the middle of the clamp, signal frequency 50..60 Hz.

Current

1A to 10A

10A to 25A

25A to 600A

Amplitude error

±

(% of measuring value)

3

2

1

Phase error not specified

2°

1°

Use LMG-Z326 and LMG specifications to calculate the accuracy of the complete system.

2.2.4 Sensor operation without connection to LMG

It is important to assure a good connection from the sensor to the LMG before switching on the load current! The operation of the sensor with load current and without connection to

the LMG will cause damage of the sensor and is dangerous for the user!

2.2.5 Connection of the sensor with LMG90/310 or other instruments with current input

Use direct current inputs I* and I.








Current sensors

2.3 AC - current clamp 200A/1A (LMG-Z325)


Figure 6: Dimensions of the LMG-Z325







Transformation ratio

Measuring range

Maximum input

Bandwidth

200A

200:1

250A

250A for 3min

40Hz to 5kHz


Current sensors

Burden

Isolation

Degree of pollution

Temperature range

Weight

Output connection

1 to 2 ohms bare conductor: phase/ground 30Veff insulated conductor: see cable spec.

2

-10°C to +50°C

115g safety sockets for 4mm plugs

2.3.3 Accuracy

Accuracies based on: sinusoidal current, ambient temperature 23±3°C, conductor in the middle of the clamp, signal frequency 50..60 Hz.

Current

5A to 10A

10A to 25A

25A to 250A

Amplitude error

±

(% of measuring value)

3

2

1

Phase error not specified

2.5°

1°

Use LMG-Z325 and LMG specifications to calculate the accuracy of the complete system.

2.3.4 Sensor operation without connection to LMG

It is important to assure a good connection from the sensor to the LMG before switching on the load current! The operation of the sensor with load current and without connection to

the LMG will cause damage of the sensor and is dangerous for the user!

2.3.5 Connection of the sensor with LMG90/310 or other instruments with current input









Current sensors

2.4 Error compensated AC - current clamp 1000A (L45-Z10/-Z11)

(L45-Z11 is a set of 4x L45-Z10)

Figure 7: L45-Z10/-Z11

Figure 8: Dimensions of the L45-Z10/-Z11







Max. trms value


Maximum input

Bandwidth

Protection class

Degree of pollution

Temperature range

Weight

Output connection

1000A

1200A

3000Apk

1200A for 30min

2Hz to 40kHz

600V CAT. III

2

-10°C to +50°C

650g



Current sensors

2.4.3 Accuracy

Accuracies based on: sinusoidal current, ambient temperature 23±3°C, calibration interval 1 year, conductor in the middle of the clamp.

The values are in

±

(% of measuring value + % of measuring range current clamp) and in ±( phase error in degree)

Frequency 2Hz to

10Hz

Current

10Hz to

45Hz

45Hz to

65Hz

65Hz to

1kHz

1kHz to

5kHz

5kHz to

10kHz

10kHz to

20kHz

20kHz to

40kHz

0.7+0.2 0.2+0.05 0.1+0.05 0.1+0.05 0.3+0.05 0.4+0.1

0.5+0.2

2+0.4

Phase 5 1 0.3

0.3

1 2 5 30

Use L45-Z10 and LMG specifications to calculate the accuracy of the complete system.








Use sensor input, you get the following ranges: nominal value 31.2A

62.5A



188A 375A 750A 1500A 3000A


Use L50-Z14, you get the following ranges: nominal value 7.5A

15A 30A 62.5A


18.8A

37.5A


46.9A

93.8A

188A 375A 750A 1500A 3000A


Current sensors

2.5 DC - current clamp 1000A (L45-Z26)

Figure 9: L45-Z26

Figure 10: Dimensions of the L45-Z26







Max. trms value

Measuring range

Maximum input

Bandwidth

Protection class

1000A

1000A

1500Apk

1500A

DC to 2kHz

600V CAT. III


Current sensors

Degree of pollution

Temperature range

Weight

Output connection

2

-5°C to +50°C

0.6kg


2.5.3 Accuracy


The accuracy is valid only with manual zero adjustment at the DC-Clamp prior clamp on!

The values are in

±

(% of measuring value+% of nominal input current), phase in degree

Current

10A to 1500A

Amplitude error

DC to 2kHz

1.5%+0.1%

Phase error at 45 to 66Hz

<0.3°

Phase error at 1kHz

<3°







Use sensor input, , internal supply via LMG, you get the following ranges: nominal value 31.3A

62.5A


62.5A

125A 250A 500A 1000A max. peak value 46.9A

93.8A

188A 375A 750A 1500A


Use L50-Z14, internal supply via LMG, you get the following ranges: nominal value 7.8A

15.6A

31.3A

62.5A


15.6A

31.3A

62.5A


23.4A

46.9A

93.8A

188A 375A 750A 1500A


Current sensors

2.6 Error compensated AC - current clamp 3000A (L45-Z16/-Z17)

(L45-Z17 is a set of 4x L45-Z16)

Figure 11: L45-Z16/-Z17

Figure 12: Dimensions of the L45-Z16/-Z17






Current sensors



Max. trms value


Maximum input

Bandwidth

Protection class

Degree of pollution

Temperature range

Weight

Output connection

3000A

3600A

9000Apk

6000A for 5min

5Hz to 10kHz

600V CAT. III

2

-5°C to +50°C

1,6kg


2.6.3 Accuracy

Accuracies based on: sinusoidal current, ambient temperature 23±3°C, calibration interval 1 year, conductor in the middle of the clamp. The values are in

±

(% of measuring value + % of measuring range current clamp) and in ±( phase error in degree)

Frequency/Hz 2Hz to

10Hz

Current

Phase 5

10Hz to

45Hz

0.7+0.2 0.2+0.05

1

45Hz to

65Hz

0.1+0.05

0.3

65Hz to

1kHz

0.2+0.05

0.5

1kHz to

2.5kHz

0.4+0.1

2

2.5kHz

to 5kHz

1+0.3

10

5kHz to

10kHz

2+0.4


30








Current sensors


Use sensor input, you get the following ranges: nominal value 100A 200A 400A 800A 1600A 3200A max. trms value 113A 225A 450A 900A 1800A 3600A max. peak value 281A 563A 1125A 2250A 4500A 9000A


Use L50-Z14, you get the following ranges: nominal value 25A 50A 100A 200A 400A 800A 1600A 3200A max. trms value 28A 56A 113A 225A 450A 900A 1800A 3600A max. peak value 70A 141A 281A 563A 1125A 2250A 4500A 9000A


Current sensors

2.7 Hall current sensors, 50/100/200A (L45-Z28-HALLxx)

Figure 13: Dimensions of the L45-Z28-HALL50 and HALL100

Figure 14: Dimensions of the L45-Z28-HALL200




Do not overload any current sensor with more than the measurable TRMS value!


2.7.2 Specifications and accuracies

Accuracies based on: sinusoidal current, ambient temperature 23±3°C, calibration interval 1 year, conductor in the middle of the hall sensor.


Current sensors

Sensor

Rated range value

Measurable TRMS value

Permissible peak value

Accuracies in % of measurable TRMS value at DC ..

100Hz

Linearity

DC offset error at 25°C

DC offset thermal drift (0°C.. 70°C)

Response time at 90% of measurable TRMS value di/dt accurately followed

Bandwidth (-1dB)

HALL50

35A

50A

70A

±

0.9

0.15%

±

0.2A

±

0.5A

<1

µ s

> 200A/

µ s

DC to 200kHz

HALL100

60A

100A

120A

±

0.7

0.15%

±

0.2A

±

0.5A

<1

µ s

> 200A/

µ s

DC to 200kHz

HALL200

120A

200A

240A

±

0.65

0.15%

±

0.4A

±

0.5A

<1

µ s

> 200A/

µ s

DC to 100kHz

Use HALLxx and LMG specifications to calculate the accuracy of the complete system.

This sensors are supplied by the HD15 sensor connector of the LMG.

The transformers are only allowed to operate with cables which - according to the printing on the cable - are designed for this individual transformer.



damage of the sensor and/or of the LMG/supply unit!

To remove the LMG/supply unit from the test location without removing the sensors from the current path, disconnect the HD15 plug from the LMG and connect all of the 15pins together with ground (shield of the plug). To do this, the load current has to be switched off!






Use sensor input, you get the following ranges:

HALL50: nominal value 1.09A

2.19A

4.38A

8.75A

17.5A

35A


Current sensors max. trms value 1.57A

3.13A

6.25A

12.5A

25A max. peak value 2.19A

4.38A

8.75A

17.5A

35A

50A

70A


3.75A

7.5A

15A 30A 60A max. trms value 3.13A

6.25A

12.5A

25A 50A 100A max. peak value 3.75A

7.5A

15A 30A 60A 120A


7.5A


12.5A


15A 30A 60A 120A 240A


Use L50-Z14, you get the following ranges:


0.55A

1.09A

2.19A

4.38A

8.75A

17.5A

35A max. trms value 0.39A

0.79A

1.57A

3.13A

6.25A

12.5A


1.09A

2.19A

4.38A

8.75A

17.5A

35A

50A

70A


0.94A

1.88A

3.75A

7.5A


1.57A

3.13A

6.25A

12.5A


1.88A

3.75A

7.5A

15A 30A 60A 120A


1.88A

3.75A

7.5A


3.13A

6.25A

12.5A


3.75A

7.5A

15A 30A 60A 120A 240A


Current sensors

2.8 Hall current sensors, 300/500/1k/2kA (L45-Z29-HALLxx)


Figure 16: Dimensons of the L45-Z29-HALL500




Current sensors








Sensor

Rated range value



Accuracies in % of measurable TRMS value at DC

.. 100Hz

Linearity




Bandwidth (-1dB)

Supply current @ ±15V

HALL300

250A

300A

500A

±

0.4

HALL500

400A

500A

800A

±

0.8

HALL1000 HALL2000

600A 1000A

1000A

1200A

±

0.4

2000A

2100A

±

0.3

0.1%

±

0.4A

±

1.3A

<1

µ s

> 100A/

µ s

0.1%

±

0.5A

±

0.6A

<1

µ s

> 100A/

µ s

0.1%

±

2A

±

2.5A

<1

µ s

> 50A/

µ s

0.1%

±

4A

±

1.5A

<1

µ

> 50A/ s

µ s

DC..100kHz

DC..100kHz

DC..150kHz

DC..100kHz

270mA 420mA 270mA 460mA



This sensors have an additional 9 pin SUB-D connector for an external supply (for example

SSU4). If you want to use your own supply, you have to use the following pins of the 9 pin

SUB-D connector:

GND: Pin 3 and Pin 4 (always connect both)

-15V Pin 5

+15V Pin 9

Please make sure, that your own power supply can drive the needed supply current. If you offer too few current you will get distortions and other accuracy losses in your measured current without warning!


Current sensors




To remove the LMG/supply unit from the test location without removing the sensors from the current path, disconnect the DSUB9 plug and the HD15 plug from the LMG and connect all of the 9pins and all of the 15pins together with ground (shield of the plugs). To do this, the load current has to be switched off!




The use with LMG95 is not recommended, better use: L50-Z29-Hallxx and L95-Z07. Set

LMG current scaling factor appropriate to the scaling factor marked on the label on L95-Z07.


Use sensor input, you get the following ranges:


15.6A

31.1A

62.5A

125A 250A max. trms value 9.4A

18.7A

37.5A


31.1A

62.5A

125A 250A 500A


25A 50A 100A 200A 400A max. trms value 15.6A

31.1A

62.5A

125A 250A 500A max. peak value 25A 50A 100A 200A 400A 800A


37.5A


62.5A


75A 150A 300A 600A 1200A


62.5A


125A 250A 500A 1000A 2000A


Current sensors max. peak value 65.6A

131A 263A 525A 1050A 2100A


The use with LMG500 is not recommended, please see L50-Z29-Hallxx


Current sensors

2.9 Hall current sensors, 300/500/1k/2kA (L50-Z29-HALLxx)

Figure 19: Dimensions of the L50-Z29-Hall300

Figure 20: Dimensons of the L50-Z29-Hall500




Current sensors








Sensor

Rated range value



Accuracies in % of measurable TRMS value at DC

.. 100Hz

Linearity




Bandwidth (-1dB)

HALL300

250A

300A

500A

±

0.4

HALL500

400A

500A

800A

±

0.8

HALL1000 HALL2000

600A 1000A

1000A

1200A

±

0.4

2000A

2100A

±

0.3

0.1%

±

0.4A

±

1.3A

<1

µ s

> 100A/

µ s

0.1%

±

0.5A

±

0.6A

<1

µ s

> 100A/

µ s

0.1%

±

2A

±

2.5A

<1

µ s

> 50A/

µ s

0.1%

±

4A

±

1.5A

<1

µ

> 50A/ s

µ s

DC..100kHz

DC..100kHz

DC..150kHz

DC..100kHz










Current sensors




The use with LMG450 is not possible!


Use L50-Z14, internal supply via LMG, you get the following ranges:

HALL300: nominal value 2A 3.9A

7.8A

15.6A

31.1A

62.5A

125A 250A max. trms value 2.4A

4.7A

9.4A

18.7A

37.5A


7.8A

15.6A

31.1A

62.5A

125A 250A 500A


6.25A

12.5A


7.8A

15.6A

31.1A

62.5A


12.5A

25A 50A 100A 200A 400A 800A


9.4A

18.7A

37.5A


15.6A

31.1A

62.5A


18.7A

37.5A

75A 150A 300A 600A 1200A


15.6A

31.1A

62.5A


31.1A

62.5A


32.8A

65.6A

131A 263A 525A 1050A 2100A


Current sensors

2.10 Rogowski flex sensors (L45-Z32-FLEXxx)

Figure 23: Dimensions of the L45-Z32-FLEX xx

Figure 24: Dimensions of the L45-Z32-FLEX xx






Sensor

Rated range value

Permissible peak range value

Position sensitivity

Frequency range

Phase Shift (at 50/60Hz, cable in middle of the head)

Rogowski sensor length

Connection cable length

Clip on round (diameter)

FLEX 500

500A

700A

±5%

10Hz .. 5kHz

0.1°

30cm

2m

75mm

FLEX 1000

1000A

1400A

±2%

10Hz .. 5kHz

0.1°

40cm

2m

110mm

FLEX 3000

3000A

4200A

±2%

10Hz .. 5kHz

0.1°

75cm

2m

200mm


Current sensors

Clip on rectangular (a x b) max. loops

Weight

Temperature range

Protection class

Degree of pollution

Output connection

20mm x 85mm 30mm x 120mm 60mm x 250mm

1 1 3

100g 120g 160g

-20°C .. +85°C

600V / CATIII

2

HD15 plug (with EEPROM) for LMG sensor input

2.10.3 Accuracy


The values are:

±

(% of measuring value + % of rated range value)

Frequency/Hz

FLEX xx current accuracy

10Hz to 45Hz 45Hz to 65Hz 65Hz to 1kHz 1kHz to 5kHz

0.5+1.5

0.5+0.6

0.5+1.5

5+5

Use FLEXxx and LMG specifications to calculate the accuracy of the complete system.










Use sensor input, internal supply via LMG, you get the following ranges:

FLEX500: nominal value 15.6A

31.3A

62.5A

125A 250A 500A


Current sensors max. trms value 15.6A

31.3A

62.5A


43.8A

87.5A

175A 350A 700A


62.5A


62.5A


87.5A

175A 350A 700A 1400A



188A 375A 750A 1500A 3000A max. peak value 131A 263A 525A 1050A 2100A 4200A


Use L50-Z14, internal supply via LMG, you get the following ranges:


7.8A

15.6A

31.3A

62.5A


7.8A

15.6A

31.3A

62.5A


10.9A

21.9A

43.8A

87.5A

175A 350A 700A


15.6A

31.3A

62.5A


15.6A

31.3A

62.5A


21.9A

43.8A

87.5A

175A 350A 700A 1400A


46.9A

93.8A


46.9A

93.8A


65.6A

131A 263A 525A 1050A 2100A 4200A


Current sensors

2.11 Low current shunt (LMG-SHxx)

Figure 25: LMG-SHxx



Please regard that there is no isolation inside the Sensor, therefore the instrument needs isolated inputs! The Sensor is suitable for LMG95, LMG500 and LMG310, but not for LMG450!


2.11.2 Selection of the resistance value

Select an applicable shunt resistance according to the necessary load current range. Values between 1 ohm and 1000 ohms are available. But take into concern, that this shunt resistance is connected in series to your device under test. Oversized resistors may distort and take influence on the load current.

2.11.3 Specifications, Accuracy

The specified accuracy is valid in combination with the LMG95 / LMG500 sensor input impedance of 100kOhm and the correct setting of the scaling ratio (see table). Accuracies based on: sinusoidal current, frequency 45-65 Hz, ambient temperature 23±3°C, calibration interval 1 year. The values are in

±

(% of measuring value). Use LMG-SHxx and LMG specifications to calculate the accuracy of the complete system.

nominal resistance scaling ratio accuracy maximum trms input current

1 ohm

2 ohms

5 ohms

1.00001

0.50001

0.20001

1000 mA

710 mA

450 mA

10 ohms

0.10001

320 mA

20 ohms

50 ohms

100 ohms

200 ohms

500 ohms

1000 ohms

0.05001

0.02001

0.01001

0.00501

0.00201

0.00101

0.15%

160 mA

100 mA

70 mA

50 mA

31 mA

22 mA


Current sensors bandwidth protection class degree of pollution temperature range weight output connection

DC to 100kHz

600V CAT III

2

0°C to +40°C

100g

Security BNC cable and adapter


The use with LMG90 is not possible. With LMG310 use Isensor/external Shunt input.


Use external Shunt input, you get the following ranges (all in A):

1ohm: nominal value 30m 60m 120m 250m 500m 1

(2) (4)

max. trms value 60m 130m 270m 540m 1

(2) (4) (8)

max. peak value 97.7m

195.3m

390.6m

781.3m

1.563

3.125

(6.25) (12.5)

(regard maximum trms input current!)

2ohms: nominal value 15m 30m max. trms value 30m 65m

60m

135m

125m

270m

250m

500m

500m

(1)

(1)

(2)

(2)

(4)

max. peak value 48.85m 97.65m 195.3m

390.7m

781.5m

1.563

(3.125) (6.25)


5ohms: nominal value 6m max. trms value 12m

12m

26m

24m

54m

50m

108m

100m

200m

200m

400m

400m

(0.8)

(800m)

(1.6)


39.06m

78.12m

156.3m

312.6m

625m 1.25

(2.5)


10ohms: nominal value 3m 6m 12m 25m 50m 100m 200m

(400m)


Current sensors max. trms value 6m 13m 27m 54m 100m 200m

(0.4) (800m)


19.53m 39.06m 78.13m 156.3m 312.5m 625m

(1.25)


20ohms: nominal value 1.5m

3m 6m 12.5m

25m 50m 100m

(200m)

max. trms value 3m 6.5m

13.5m

27m 50m 100m

(0.2) (400m)

max. peak value 4.885m 9.765m 19.53m 39.07m 78.15m 156.3m 312.5m (625m)


50ohms: nominal value 600u 1.2m

2.4m

5m 10m 20m 40m 80m max. trms value 1.2m

2.6m

5.4m

10.8m

20m 40m 80m

(0.16)


3.906m

7.812m

15.63m

31.26m

62.5m

125m 0.25

100ohms: nominal value 300u 600u max. trms value 600u 1.3m

1.2m

2.7m

2.5m

5.4m

5m

10m

10m

20m

20m

40m

40m

(80m)

max. peak value 977u 1.953m

3.906m

7.813m

15.63m

31.25m

62.5m

125m

200ohms: nominal value 150u 300u 600u 1.25m

2.5m

5m 10m 20m max. trms value 300u 650u 1.35m

2.7m

5m 10m 20m 40m max. peak value 488.5u

976.5u

1.953m 3.907m 7.815m 15.63m 31.25m 62.5m

500ohms: nominal value 60u max. trms value 120u

120u

260u

240u

540u

500u

1.08m

1m

2m

2m

4m

4m

8m

8m

16m max. peak value 195.4u

390.6u

781.2u

1.563m

3.126m

6.25m

12.5m

25m

1000ohms: nominal value 30u 60u 120u 250u 500u 1m 2m 4m


Current sensors max. trms value 60u 130u 270u 540u 1m 2m 4m 8m max. peak value 97.7u

195.3u

390.6u

781.3u

1.563m

3.125m

6.25m

12.5m




Use external sensor input, you get the following ranges (all in A):

1ohm: nominal value 30m 60m 120m 250m 500m 1

(2) (4)

max. trms value 37m 75m 150m 300m 600m

(1.2) (2.5) (5)

max. peak value 63m 125m 250m 500m 1 2

(4) (8)


2ohms: nominal value 15m 30m 60m 125m 250m 500m

(1) (2)

max. trms value 18.5m

37.5m

75m 150m 300m 600m

(1.25) (2.5)


62.5m

125m 250m 500m 1

(2) (4)



(800m)


15m 30m 60m 120m 240m

(0.5) (1)


25m 50m 100m 200m 400m 800m

(1.6)



(400m)


7.5m

15m 30m 60m 120m 250m

(500m)


12.5m

25m 50m 100m 200m 400m

(800m)


20ohms:


Current sensors nominal value 1.5m

3m 6m 12.5m

25m 50m 100m

(200m)


3.75m

7.5m

15m 30m 60m 125m

(250m)


6.25m

12.5m

25m 50m 100m 200m

(400m)



2.4m

5m 10m 20m 40m 80m max. trms value 740u 1.5m

3m 6m 12m 24m 50m 100m max. peak value 1.26m

2.5m

5m 10m 20m 40m 80m 160m


100ohms: nominal value 300u 600u 1.2m

2.5m

5m 10m 20m 40m max. trms value 370u 750u 1.5m

3m 6m 12m 25m 50m max. peak value 630u 1.25m

2.5m

5m 10m 20m 40m 80m



2.5m

5m 10m max. trms value 185u 375u 750u 1.5m

3m max. peak value 315u 625u 1.25m

2.5m

5m

6m

10m

12.5m

20m

20m

25m

40m


500ohms: nominal value 60u 120u 240u 500u 1m 2m 4m 8m max. trms value 74u 150u 300u 600u 1.2m

2.4m

5m 10m max. peak value 126u 250u 500u 1m 2m 4m 8m 16m


1000ohms: nominal value 30u 60u 120u 250u 500u 1m 2m 4m max. trms value 37u 75u 150u 300u 600u 1.2m

2.5m

5m max. peak value 63u 125u 250u 500u 1m 2m 4m 8m



Current sensors

2.12 Low current shunt with overload protection (LMG-SHxx-P)

Figure 26: LMG-SHxx-P



Please regard that there is no isolation inside the Sensor, therefore the instrument needs isolated inputs! The Sensor is suitable for LMG95, LMG500 and LMG310, but not for LMG450!


2.12.2 Selection of the resistance value

Select an applicable shunt resistance according to the necessary load current range. Values between 1 ohm and 200 ohms are available. Select the resistance value by the maximum peak input current according to the table in chapter 2.31.3. But take into concern, that this shunt resistance is connected in series to your device under test. Oversized resistors may distort and take influence on the load current.

2.12.3 Specifications, Accuracy

The specified accuracy is valid in combination with the LMG95 / LMG500 sensor input impedance of 100kOhm and the correct setting of the scaling ratio (see table). Accuracies based on: sinusoidal current, frequency 45-65 Hz, ambient temperature 23±3°C, calibration interval 1 year. The values are in

±

(% of measuring value). Use LMG-SHxx-P and LMG specifications to calculate the accuracy of the complete system.

nominal resistance scaling ratio

1 ohm

2 ohms

5 ohms

10 ohms

20 ohms

50 ohms

100 ohms

200 ohms

1.00001

0.50001

0.20001

0.10001

0.05001

0.02001

0.01001

0.00501

accuracy 0.15% 0.3% maximum peak 710 350 140 70 18 10 5 2.5


Current sensors input current for specified accuracy mApk mApk mApk mApk mApk mApk mApk mApk maximum trms input current, overload

20A (overload protection) for max. 1 minute bandwidth DC to 10kHz protection class 600V CAT III degree of pollution

2 temp. range weight output connection

0°C to +40°C

150g

Security BNC cable and adapter


The use with LMG90 is not possible. With LMG310 use Isensor/external Shunt input.


Use external Shunt input, you get the following ranges (all in A):

1ohm: nominal value 30m max. trms value 60m

60m

130m

120m

270m

250m

540m

500m

1

1

2

2

4

4

8


195.3m

390.6m

781.3m

1.563

3.125

6.25

12.5

(don’t use the upper ranges, outside accuracy specification!)

2ohms: nominal value 15m 30m 60m 125m 250m

500m 1 2


1 2 4

max. peak value 48.85m 97.65m 195.3m

390.7m

781.5m

1.563

3.125

6.25



200m 400m 800m


400m 800m 1.6


39.06m

78.12m

156.3m

312.6m

625m 1.25

2.5



Current sensors

10ohms: nominal value 3m max. trms value 6m

6m

13m

12m

27m

25m

54m

50m

100m

100m

200m

200m

400m

400m

800m


19.53m 39.06m 78.13m 156.3m 312.5m

625m 1.25



3m 6m 12.5m

25m 50m 100m 200m

max. trms value 3m 6.5m

13.5m

27m

50m 100m 200m 400m

max. peak value 4.885m 9.765m 19.53m 39.07m 78.15m 156.3m 312.5m 625m


50ohms: nominal value 600u max. trms value 1.2m

1.2m

2.6m

2.4m

5.4m

5m

10.8m

10m

20m

20m

40m

40m

80m

80m

160m


3.906m

7.812m

15.63m

31.26m

62.5m

125m 250m


100ohms: nominal value 300u 600u max. trms value 600u 1.3m

1.2m

2.7m

2.5m

5.4m

5m

10m

10m

20m

20m

40m

40m

80m


3.906m

7.813m

15.63m

31.25m

62.5m

125m



2.5m

5m 10m 20m

max. trms value 300u 650u 1.35m

2.7m

5m 10m 20m 40m

max. peak value 488.5u

976.5u

1.953m 3.907m 7.815m 15.63m 31.25m 62.5m





Use external sensor input, you get the following ranges (all in A):


Current sensors

1ohm: nominal value 30m 60m 120m 250m 500m

1 2 4


1.2

2.5

5

max. peak value 63m 125m 250m 500m 1

2 4 8



500m 1 2


37.5m

75m 150m 300m

600m 1.25

2.5


62.5m

125m 250m 500m

1 2 4



200m 400m 800m


15m 30m 60m 120m

240m 500m 1


25m 50m 100m 200m

400m 800m 1.6



100m 200m 400m


7.5m

15m 30m 60m

120m 250m 500m


12.5m

25m 50m 100m

200m 400m 800m



3m 6m 12.5m

25m

50m 100m 200m


3.75m

7.5m

15m max. peak value 3.15m

6.25m

12.5m

25m

30m

50m

60m

100m

125m

200m

250m

400m



2.4m

5m

10m 20m 40m 80m

max. trms value 740u 1.5m

3m max. peak value 1.26m

2.5m

5m

6m

10m

12m

20m

24m

40m

50m

80m

100m

160m


100ohms:


Current sensors nominal value 300u 600u 1.2m

2.5m

5m 10m 20m 40m

max. trms value 370u 750u 1.5m

3m

6m 12m 25m 50m


2.5m

5m

10m 20m 40m 80m



2.5m

5m 10m

max. trms value 185u 375u 750u 1.5m

3m 6m 12.5m

20m

25m

max. peak value 315u 625u 1.25m

2.5m

5m 10m 20m 40m



LMG95 connection cables and adapter

3 LMG95 connection cables and adapter

3.1 Adapter for the use of HD15-Sensors with LMG95 (L95-Z07)

Figure 27:Adapter for the use of HD15-Sensors with LMG95 (L95-Z07)


Always connect the sensor first to the meter, and afterwards to the device under test

Connecting cables without savety isolation! Avoid contact to hazardous voltage!


3.1.2 Specifications suitable sensors

L45-Z26

L45-Z28-HALLxx

L50-Z29-HALLxx

L45-Z32-FLEXxx

PSUxx-K-L50

L45-Z406

L45-Z10

L45-Z16

remarks

DC current clamp 1000A

Hall-transducer 50A, 100A, 200A

Hall-transducer 300A, 500A, 1000A, 2000A

Rogowski-transducer 500A, 1000A, 3000A

PSU60, -200, -400, -700 better use: LMG-Z322 better use: LMG-Z329

Plug the DSUB connector to LMG95 external supply and the two 4mm jacks to LMG95 ext.Shunt/I.



3.1.3 Accuracy

If you order the accessory L95-Z07 together with the suitable current sensor, then you can find a label with the scaling factor on L95-Z07. Please set this current scaling in the range menue of the LMG95. For the use of different current sensors e.g. alternating with LMG450 (not ordered at the same time with L95-Z07) you have to calibrate the sensor together with the

LMG95 to find the correct scaling. Use the sensor- and LMG specifications to calculate the accuracy of the complete system.



3.2 PSU/PCT-K-L95

Figure 28: PSU/PCT-K-L95, for direct connection of the

PSU60/200/400/700 and PCT200/600 to the current input of the LMG95

Figure 29: Connection of PSU60/200/400/700 and PCT200/600 to the LMG95


Always connect the sensor first to the meter, and afterwards to the device under test

Connecting cables without savety isolation! Avoid contact to hazardous voltage!


3.2.2 Installation

No additional supply needed. Cable length between PSU/PCT and LMG: 2.5m



3.2.3 LMG95 ranges (direct current input) with PCT200

Iscale=500 nominal value 75A max. trms value 150A

150A


469A

limited by PCT200 to max. 300Apk!

3.2.4 LMG95 ranges (direct current input) with PCT600

Iscale=1500 nominal value 225A max. trms value 450A

450A


1407A

limited by PCT600 to max. 900Apk!

3.2.5 LMG95 ranges (direct current input) with PSU200

Iscale=1000 nominal value 150A max. trms value

300A

max. peak value

469A

limited by PSU200 to max. 200Apk!


Iscale=2000 nominal value 300A max. trms value

600A

max. peak value

938A



Iscale=1750 nominal value 262.5A

525A max. trms value 525A

1050A


LMG95 connection cables and adapter max. peak value

820.75A 1641.5A


3.2.8 Accuracy

Use PSU/PCT and LMG95 specifications to calculate the accuracy of the complete system.




To remove the LMG/supply unit from the test location without removing the sensors from the current path, disconnect the DSUB9 plug and the savety laboratory plugs from the LMG and connect all of the 9pins together with ground (shield of the plug) and together with the hotwired savety laboratory plugs. To do this, the load current has to be switched off!




The special design of all LMG450 sensors makes them very easy and comfortable to use. The

HD15 SUB D plug contains the identification of the sensor type, the measuring ranges, including the needed scaling and several more parameters. The LMG450 reads this values and the meter will automatically configured to the optimum adjustments for using this special sensor. The LMG range setup is automaticaly taken from the sensor EEPROM. Further on we correct some of the sensor errors (transfer error, delay time, ...). So you get the best measuring results with each sensor.

4.1 BNC adapter to sensor input HD15 without EEPROM (L45-Z09)

Figure 30: L45-Z09

By this adapter you can connect a voltage via a BNC cable to the LMG450 external current sensor input. This voltage has to be isolated, because the BNC screen is electrically connected to the case of the LMG450!

This is a simple electrical adapter. No values can be stored!



4.2 Adapter for isolated custom current sensors with 1A output (L45-Z22)

Figure 31: L45-Z22


Use only galvanic separating current sensors! There is no potential separation in this adapter and in the LMG450 sensor input! NOT FOR DIRECT CURRENT

MEASUREMENT!!



L45-Z22 is an accessory for the precision power meter LMG450. Its benefit is the usage of isolated custom current sensors with 1A output current e.g. current transducers or clamps with the LMG450 sensor input. In comparison to the usage of the direct current inputs of the

LMG450, the accessory L45-Z22 is optimized for the sensor output current of 1A and a dynamic range down to 31.25mA as full range.

Nominal input current 1A

Max. trms value 1.2A

Measuring range 3Apk

Input resistance

Bandwidth

Isolation

340mOhms

DC to 20kHz

NO ISOLATION! NOT FOR DIRECT CURRENT

MEASUREMENT!

Connection HD15 (with EEPROM) for LMG sensor input, length about 80cm

4.2.3 Accuracy

Accuracies based on: sinusoidal current, ambient temperature 23±3°C, calibration interval 1 year. The values are:

±

(% of measuring value + % of measuring range)



Frequency/Hz

Current

DC to 45Hz

0.05+0.05

45Hz to 65Hz

0.05+0.05

45Hz to 5kHz

0.1+0.1

5kHz to 20kHz

0.25+0.25



not possible


not possible


nominal value 0.03A

0.06A

0.12A

0.25A

0.5A

1A max. trms value 0.04A

0.08A

0.15A

0.3A

0.6A

1.2A

max. peak value 0.09A

0.19A

0.375A

0.75A

1.5A

3A


not necessary, because of good current dynamic range of LMG500




5.1 LMG500 current sensor adapter (L50-Z14)

Figure 32: L50-Z14

The special design of all LMG500 sensors makes them very easy and comfortable to use. The

HD15 SUB D plug contains the identification of the sensor type, the measuring ranges, including the needed scaling and several more parameters. The LMG500 reads this values and the meter will automatically configured to the optimum adjustments for using this special sensor. The LMG range setup is automaticaly taken from the sensor EEPROM. Further on we correct some of the sensor errors (transfer error, delay time, ...). So you get the best measuring results with each sensor.

For all LMG500 sensors the Adapter L50-Z14 is needed, because internally it is necessary to connect the system ground (CPU, Sensor supply, ...) with the ground of the measuring channel. Both signals are connected with a HD15 SUB D plug, without galvanic separation.

The adapter L50-Z14 guarantees that no measuring leads are connected to the measuring channel at the same time and prevents electrical shock.


Accessories

6 Accessories

6.1 Sensor supply unit for up to 4 current sensors (SSU4)

The SSU4 is a supply unit to feed up to 4 pieces of current sensors. Each sensor can be supplied with +15V / 500mA, -15V / 500mA at the same time. The transducers are connected to the four 9 pin SUB-D connectors. Depending on the sensor the output signal can be accessed directly from the sensor or via the 15 pin SUB-D connector.

6.1.1 Technical data

Mains supply

Safety

Dimensions

85...264V, 47...440Hz, ca. 40W,

Fuse 5x20mm T3.15A/250V IEC127-2/3

Protection method IP20 according DIN40050

Protection class I; Mains supply: Overvoltage class II and pollution degree 2 according

EMC

IEC61010-1

EN55011, EN50082

EN61010

Output voltage

Output current

Climatic class

Desktop:

19“ rack:

±

15V

±

2%

320mm (W) x 49mm (H) x 307mm (D)

63DU x 1HU x 360mm max. 500mA on each jack

KYG according to DIN 40040

0°C...40°C, humidity max. 85%, annual average 65%, no dewing

Storage temperature -20°C to +55°C

Weight 3kg


Accessories

6.1.2 Technical drawings

Figure 33: Dimensions of the SSU4

In the Figure 33 you see the desktop instrument, also attended the angles for rack mounting

6.1.3 Connectors

6.1.3.1 9 Pin SUB-D connectors for the sensors

Via the following connector the sensors (e.g. PSU600, L45-Z29-xxxx, ...) are connected to the

SSU4 sensor supply unit. For each channel there is one connector.

Connector to the sensors


Accessories

Pin

6

7

8

1, 2

3, 4

5

9

Usage

Not used. Do not connect!

Ground (GND)

-15V. max. 500mA

Current output signal of the sensor (max. 500mA!)

Not used. Do not connect!

Signal input to indicate a proper operation of the sensor:

+15V or n.c.: The red LED is on

GND: The green LED is on

+15V, max. 500mA

The current output signal of the sensor is connected via a 2.7

Ω

resistor to the corresponding channel of the 15 pin connector for the instrument. When the current returns from the instrument it is fed into ground.

6.1.3.2 15 Pin SUB-D connectors for the measuring instrument

Via the following connector the measuring instrument can be connected to the sensor supply unit:

Usage

Current output channel 1




Ground

Connector to the instrument

Pin

1, 2

3, 4

5, 6

7, 8

9-15

The output current of each channel can be measured and has then to be returned to Ground.


Accessories

6.1.4 Mounting

6.1.4.1 Rack mounting

Fix the two rack mounting metal sheets with the four screws at the two sides of the SSU4 case. Now you can mount it into any 19“ rack.

6.1.4.2 Instrument mounting

You can mount the SSU4 directly under a LMG95 or LMG450. Please do this in following order:

•

Switch off both instruments and remove all cables.

•

Remove the four feets of the LMG450 or LMG95 case. To do this, just remove the four screws. The nuts are fixed inside the LMG450 or LMG95.

•

Remove the four feets of the SSU4 case. The four screws are mounted into the four screwnuts which are accessable from the top of the case. Remove also this nuts.

•

With the four M4x55 screws (which are added) you mount now the four feets of the SSU4 with following orientation:

LMG95: mount the front feets in the 2 nd

position from the front plate.

mount the rear feets in the 2 nd

position from the rear plate.

LMG450: mount the front feets in the position closest to the front plate.

mount the rear feets in the position closest to the rear plate.

In both cases: The small white rubber on the feets has to be mounted in direction to the rear/front plate. The four screws are fixed into the nuts of the LMG450/LMG95 bottom

(where the original feeds were fixed).

Dimensions W*D*H

Figure 34: SSU4 mounted under LMG450

320mm * 306.7mm * 224.6mm with feets, 176.9 without feets


Accessories

6.1.5 SSU4 connector cables

6.1.5.1 Cable to connect measuring signal plugs of SSU4 with LMG310 current inputs (SSU4-K-L31)

Figure 35: SSU4-K-L31, to connect measuring signal plug of SSU4 to LMG310 current inputs.

Cable to connect up to four PSU600 to the current input channels of:

1 LMG310

1 LMG310 and 1 LMG95

1 LMG450 (but better using PSU600-K-L45)

2 LMG310 in Aron wiring or any other amperemeter

6.1.5.2 Connection cable PSU600 to SSU4 (PSU600-K3, K5, K10)

Figure 36: PSU600-K3, to connect the PSU600 to the SSU4 (length 3m).

Connection cable from SSU4 to PSU600; length 3m, 5m or 10m.


Accessories

6.1.6 Modification option of SSU4 available for the use of PCT200, PCT600,

PSU60, PSU200, PSU400 and PSU700 together with SSU4-K-L31

The modification is needed only for the use of PCT200, PCT600, PSU60, PSU200, PSU400 or

PSU700 with SSU4-K-L31, no modification is necessary for PSU200-K-L45 or something like that.

The following changes concerning this documentation are done:

1. In the four connector to the sensors: pin1 is connected with gnd for current return

2. The current output signal of the sensor is connected via a 0 ohms resistor to the corresponding channel of the 15 pin connector for the instrument. When the current returns from the instrument it is fed into ground.

3. The SSU4 with modification can not be used with PSU600!

Pin

5

6

9

6.1.7 Modification option of SSU4 available for the use of PSU1000HF together with LMG450 and LMG500

The following changes concerning this documentation are done:

1. DSUB9 connectors for the sensors:

Usage

-15V. max. 1000mA

Current output signal of the sensor (max. 1000mA)

+15V, max. 1000mA


Accessories

6.2 Adapter for incremental rotation speed encoders (L45-Z18)

Figure 37:L45-Z18





6.2.2 General

This plugon adapter for LMG450 converts pulses of common industrial incremental encoders with two 90 degree phase shifted pulse outputs into analogue voltage. This voltage can be analysed graphically with high temporal resolution by using sensor input of LMG450.

Compared to this, digital encoder input of process signal interface provides only one value each measuring cycle and with L45-Z18 you get a fast, high dynamic response to changes in rotation speed!

6.2.3 Description

Incremental encoders (speed sensors) with TTL technology (supply +5V and GND) or HTL technology (supply +5V and –5V) can be connected. There are four colour coded measuring ranges of the adapter to align with different pulse rates Z of the incremental encoder and maximum revolutions per minute Nmax.

Attention! Read measuring value Idc, only this presents exact speed values according to absolute value and sign (depending on sense of rotation)! Positive output voltage is seen in case A signal leads electrically by 90° to B signal. This equates usually to clockwise rotation when looking onto the encoder shaft.


Accessories

6.2.4 Ripple

As a matter of principle of frequency to voltage conversion there is a ripple at low revolution on output voltage. Built-in filters are optimised for short settling time without overshooting. In case that remaining ripple is too high, this can be reduced with the settings of LMG, for example:

•

Select adjustable lowpass filter in measuring channel

•

Extend the measuring cycle time

•

Average over a couple of measurement cycles

Selection of the filter is always a compromise of fast reaction on variation of input signal and reduction of ripple on output signal. The user can find optimal setting weighing these antithetic approaches.

6.2.5 Incremental encoders with two 90 degree phase shifted pulse outputs

Measuring range

LED Colour

Position of the slide switch adjacent of the LEDs

Z*Nmax

(Pulse rate * max.

revolution speed)

Unit

1 / min

Specified tolerance % of m.value

+ % of m.range

Red

Left most

144000

Yellow

Left

576000

Green

Right

2304000

Blue

Right most

9216000

±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1)

Max. pulse input frequency using input A and B

Hz 2400 9600 38400 153600

Formula for "Scale" 1 / min 1152000 / Z 1152000 / Z 1152000 / Z 1152000 / Z

“Z” is the number of pulses per rotation of the used incremental encoder (speed sensor)


Accessories

6.2.6 Incremental encoders with single pulse outputs

Measuring range

LED Colour


Unit

Red

Left most

Yellow

Left

Green

Right

Blue

Right most

Z*Nmax

(Pulse rate * max.

revolution speed)

1 / min


+ % of m.range

288000 1152000 4608000 9216000

±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1)

Max. pulse input frequency using input A

Formula for "Scale"

Hz

1 / min

4800 19200 76800 153600

2304000 / Z 2304000 / Z 2304000 / Z 1152000 / Z


The recognition of the rotating direction is not possible.

The output voltage is always negative if input B is left open.

The output voltage is always positive if input B is tied to pin ‘supply +5V’

6.2.7 Scaling

In range menu of LMG450 you can set the calculated scale value of the last line from above mentioned chart, depending on the pulse rate Z per rotation of the used incremental encoder.

Then the revolution will be presented correctly in value 1/min on the display. The unit will however be A (or V)! Displayed 1.465kA means 1465 1/min. For further user-friendly presentation utilise capabilities of LMG450 built-in formula editor and user defined menu.

6.2.8 Pin assignment

9 pin D-Sub connector (male) to incremental encoder

Pin No.

1 2 3 4 5

Function Supply

+5V

Supply

-5V

GND

(on screen)

Input A Input B

6 7 8 9

No connection

(internal test pins)

Screen

Screen

(on GND)


Accessories

6.2.9 Pulse input A and B

Permissible input voltage: Ulowmin = -30V at -1.4mA, Ulowmax=+0.8V at 0.001mA

Uhighmin=+2V at 0.002mA, Uhighmax=+30V at 1.2mA

Input resistance: 1Mohms at 0V<Uin<+5V

22kohms at -30V<Uin<+30V

6.2.10 Encoder supply

Voltage:

Load:

±

5V,

±

10% max.

±

100mA

6.2.11 Connection of the sensor with LMG90/310/95

not possible


Plug-and-use solution like current sensors. Use current channel.


not possible, use L50-Z18


Accessories

6.3 Adapter for incremental rotation speed encoders (L50-Z18)

Figure 38:L50-Z18





6.3.2 General

This plugon adapter for LMG500 converts pulses of common industrial incremental encoders with two 90 degree phase shifted pulse outputs into analogue voltage. This voltage can be analysed graphically with high temporal resolution by using sensor input of LMG500.

Compared to this, digital encoder input of process signal interface provides only one value each measuring cycle and with L50-Z18 you get a fast, high dynamic response to changes in rotation speed!

6.3.3 Description

Incremental encoders (speed sensors) with TTL technology (supply +5V and GND) or HTL technology (supply +5V and –5V) can be connected. There are four colour coded measuring ranges of the adapter to align with different pulse rates Z of the incremental encoder and maximum revolutions per minute Nmax.

Attention! Read measuring value Idc, only this presents exact speed values according to absolute value and sign (depending on sense of rotation)! Positive output voltage is seen in case A signal leads electrically by 90° to B signal. This equates usually to clockwise rotation when looking onto the encoder shaft.


Accessories

6.3.4 Ripple

As a matter of principle of frequency to voltage conversion there is a ripple at low revolution on output voltage. Built-in filters are optimised for short settling time without overshooting. In case that remaining ripple is too high, this can be reduced with the settings of LMG, for example:

•

Select adjustable lowpass filter in measuring channel

•

Extend the measuring cycle time

•

Average over a couple of measurement cycles

Selection of the filter is always a compromise of fast reaction on variation of input signal and reduction of ripple on output signal. The user can find optimal setting weighing these antithetic approaches.

6.3.5 Incremental encoders with two 90 degree phase shifted pulse outputs

Measuring range

LED Colour


Z*Nmax

(Pulse rate * max.

revolution speed)

Unit

1 / min


+ % of m.range

Red

Left most

144000

Yellow

Left

576000

Green

Right

2304000

Blue

Right most

9216000

±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1)

Max. pulse input frequency using input A and B

Hz 2400 9600 38400 153600

Formula for "Scale" 1 / min 1152000 / Z 1152000 / Z 1152000 / Z 1152000 / Z



Accessories

6.3.6 Incremental encoders with single pulse outputs

Measuring range

LED Colour


Unit

Red

Left most

Yellow

Left

Green

Right

Blue

Right most

Z*Nmax

(Pulse rate * max.

revolution speed)

1 / min


+ % of m.range

288000 1152000 4608000 9216000

±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1) ±(0.1+0.1)

Max. pulse input frequency using input A

Formula for "Scale"

Hz

1 / min

4800 19200 76800 153600

2304000 / Z 2304000 / Z 2304000 / Z 1152000 / Z


The recognition of the rotating direction is not possible.

The output voltage is always negative if input B is left open.

The output voltage is always positive if input B is tied to pin ‘supply +5V’

6.3.7 Scaling

In range menu of LMG500 you can set the calculated scale value of the last line from above mentioned chart, depending on the pulse rate Z per rotation of the used incremental encoder.

Then the revolution will be presented correctly in value 1/min on the display. The unit will however be A (or V)! Displayed 1.465kA means 1465 1/min. For further user-friendly presentation utilise capabilities of LMG500 built-in formula editor and user defined menu.

6.3.8 Pin assignment

9 pin D-Sub connector (male) to incremental encoder

Pin No.

1 2 3 4 5

Function Supply

+5V

Supply

-5V

GND

(on screen)

Input A Input B

6 7 8 9

No connection

(internal test pins)

Screen

Screen

(on GND)


Accessories

6.3.9 Pulse input A and B

Permissible input voltage: Ulowmin = -30V at -1.4mA, Ulowmax=+0.8V at 0.001mA

Uhighmin=+2V at 0.002mA, Uhighmax=+30V at 1.2mA

Input resistance: 1Mohms at 0V<Uin<+5V

22kohms at -30V<Uin<+30V

6.3.10 Encoder supply

Voltage:

Load:

±

5V,

±

10% max.

±

100mA

6.3.11 Connection of the sensor with LMG90/310/95

not possible


not possible, use L45-Z18


Plug-and-use solution like current sensors. Use current channel.


Accessories

6.4 Synchronisation adapter with adjustable lowpass filter (L50-Z19)

Figure 39:L50-Z19


1.) first connect the clamp to L50-Z19

2.) connect L50-Z19 to LMG500 Sync.input and switch the power meter on

3.) then connect the clamp to the device under test.

Synchronisation adapter without safety isolation! Only for current clamps with galvanic isolation! NO DIRECT CONNECTION TO ANY EXTERNAL

VOLTAGES!!


L50-Z19 is an accessory for the precision power meter LMG500. It can be used with any xxA:1A current clamp, e.g. LMG-Z325, LMG-Z326, LMG-Z322 or LMG-Z329. A burden resistor, a high sensitivity amplifier and a 8th order Butterworth lowpass filter are included in the DSUB15 plug to assure stable synchronisation to any disturbed signal.

It simplifies the synchronisation to the fundamental current frequency of a frequency inverter output. It needs about 100uA fundamental current at the signal input. That means with a

1000A:1A current clamp it is possible to detect the fundamental in a wide current range from

100mA to 1000A. If the fundamental current is lower than 100mA, several load current windings in the clamp can be used to enlarge the sensitivity or use an other clamp with

100A:1A ratio. LMG500 settings in the measure menue: set ‘Sync’ to ‘ExClmp’ and adjust the lowpass corner frequency.

Important: L50-Z19 can be configured only in Group A, if it is configured in Group A, it can be used in Group B as well via ‘Sync ext.’.


Accessories

Figure 40:L50-Z19

Select a filter with a lowpass frequency bigger than every possible fundamental frequency and(!) lower than every possible switching frequency, under all conditions of starting, breaking and acceleration of the motor.


filter name 200Hz 500Hz 1kHz 2kHz 5kHz 10kHz 20kHz

-3dB corner frequency 312.5Hz

625Hz 1.25kHz

2.5kHz

5kHz 10kHz 20kHz filter type min. current for stable synchronisation

8th order Butterworth about 100uA max. current isolation connection length

1Atrms

NO ISOLATION! (see safety warning) about 50cm

(but can be extended with usual savety laboratory leads)

6.4.3 Connection of the sensor with LMG90/310/95/450

not possible


Accessories

6.5 Ethernet Adapter (L95-Z318, L45-Z318, L50-Z318, LMG-Z318)

Figure 41: L95-Z318, L45-Z318, L50-Z318 - supply via LMG

Figure 42: L95-Z318, L45-Z318, L50-Z318 - supply via LMG

Figure 43: LMG-Z318 - external supply via wall wart

This LAN adapter Z318 is useful for the communication with a power meter LMG located anywhere in a local area network LAN via a virtual COM port simulation. The communication is transmitted by the driver over LAN to the LMG for user purposes in the same way as e.g. the direct connection of PC/COM1 to LMG/COMa. The power meter LMG will be accessible via this virtual COM port. Perfect suitable for LMG Control software.


Accessories



6.5.2 System requirements, hardware specifications

•

Windows XP home / Windows XP professional / Windows7 / 32bit or 64bit.

For other operating systems (including Windows: 98 / 2000 / NT /Vista, Linux: Debian /

Mandriva / RedHat / Suse / Ubuntu) see http://www.digi.com -> support -> drivers and download the driver appropriate for your operating system for ‘Digi Connect SP’.

• auto-sensing to 10/100 Mbit/s Ethernet

• throughput up to 230.400 baud

• data flow control with RTS/CTS, hardware reset with ‘break’

• data throughput with LMG95/450/500 binary mode: about 3000 measuring values (trms, ac, dc, ..., harmonics, flicker, sample values, ...) per second!

ascii mode: about 1000 measuring values per second

6.5.3 Connection of the adapter L95-Z318 with LMG95 / LMG95e

•

Plug the connector of L95-Z318 labeled with „to LMG’s COM B conn.“ to the LMG95 /

LMG95e COM B jack.

•

Plug the connector of L95-Z318 labeled with „supply“ to the LMG95 / LMG95e auxilary transducer supply jack, if your application uses the supply jack e.g. for PSU600, then use

LMG-Z318 with external supply via wall wart.

•

Switch on the power meter and connect the LAN cable.

• assure that the LMG firmware is 3v136 or newerfor LMG95, 5v136 or newer for LMG95e

6.5.4 Connection of the adapter L45-Z318 with LMG450

•

Plug the connector of L45-Z318 labeled with „to LMG’s COM B conn.“ to the LMG450

COM B jack.


Accessories

•

Plug the connector of L45-Z318 labeled with „supply“ to one of the LMG450 current clamp 1/2/3/4 jacks whichever is free, if your application uses four current sensors, then use LMG-Z318 with external supply via wall wart.

•


• assure that the LMG firmware is 2v121 or newer

6.5.5 Connection of the adapter L50-Z318 with LMG500

•

Plug the connector of L50-Z318 labeled with „to LMG’s COM B conn.“ to the LMG500

COM B jack.

•

Plug the connector of L50-Z318 labeled with „supply“ to one of the LMG500 sensor ID jacks whichever is free.

•


• assure that the LMG firmware is 4v077 or newer

6.5.6 Connection of the adapter LMG-Z318 with any LMGxx

•

Connect the DSUB9 jack of LMG-Z318 with a 1:1 serial connection cable to LMGs

COMa.

•

Connect the wall wart with power input of LMG-Z318.

•


6.5.7 Configure the LAN connection with the Realport setup wizard

•

You will find the setup wizard on the ZES support CD under driver\z318 or on the webpage http://www.zes.com. Start setup32.exe for 32-bit systems or setup64.exe for 64bit systems.

Press ‘next’, the wizard trys to find the ethernet adapter. If it is not found, press reset for about 3 seconds at the backside of the ethernet adapterbox to remove possible given prior

IP address and wait for about 1 minute before searching again.

This is the most important point in the installation. If the wizard still can not find the Z318 in your LAN, please ask your system administrator before you contact the support hotline of ZES. The support engineers of ZES will need a lot of detailed information about your local network to consult.

•

If the wizard found one or more devices choose the appropriate one and press ‘next’.


Accessories

•

Take care, that Z318 gets the same IP address after its next startup. Configure your local

DHCP server that the fix MAC address of Z318 gets everytime the same IP address or set a fix (and free!) IP address manually. This is important, because in the next step you assign a virtual COM port to this IP address and if the IP address was different after the next startup, the virtual COM port would be not available.

•

Select: ‘add a new device’. It might be necessary to remove previous installed drivers with

‘remove an existing device’.

•

Select the device ..

Figure 44

•

.. and assign a virtual COM port:

Figure 45


Accessories

Figure 46

The power meter LMG is now accessible via this virtual COM port.

6.5.8 Configuration and Management by web interface

•

Start your Browser and login to the IP adress obtained to your LAN adapter Z318 http://192.168.x.xx/login.htm with the username ‘root’ and the password ‘dbps’:

Figure 47

•

Here you can manage the settings in a comfortable way: e.g. check MAC Address, IP

Adress, firmware update and so on.


Accessories

Figure 48

6.5.9 Troubleshooting

The following problems may appear while installing the ethernet adapter. If the problem remains after checking the following points, please contact ZES at [email protected] or

++49 6171 628750

• please check all connections: supply, RS232, LAN, in case of LMG-Z318 and LMGx COMa: use 1:1 serial cable, no nullmodem

• connect the ethernet adapter to the power supply, press reset, wait for about 1 minute and try again

• switch off your antivirus protection software, the firewall may block the communication


Accessories

6.6 USB-RS232 Adapter (LMG-Z316)


This USB-RS232 adapter Z316 is useful for the communication with a power meter LMG and a PC with USB port via a virtual COM port simulation. The communication is transmitted by the driver over USB to the adapter for user purposes in the same way as e.g. the direct connection of PC/COMx to LMG/COMa. The power meter LMG will be accessible via this virtual COM port. Perfect suitable for LMG Control software.



6.6.2 System requirements, hardware specifications

•

Windows: driver available for Windows XP home or professional / Windows Vista, see ZES support CD ‘LMG500 USB driver’

•

Linux: driver is part of the kernel 2.4.x or newer (ftdi_sio Modul)

• throughput up to 230.400 baud

• supports data flow control with RTS/CTS, hardware reset with ‘break’


Accessories

• adapter length about 1m, standard RS232 DSUB9 male with UNC nuts and USB typ A plug

• connection to LMG with standard 1:1 serial cable, elongation possible up to 15m

6.6.3 RS232 plug

DSUB9 male connector with UNC screw nuts, pin assignment: pin1: pin2: pin3: pin4: pin5: pin6: pin7: pin8: pin9:

CD (carrier detect)

RX (receive data)

TX (transmit data)

DTR (data terminal ready)

GND

DSR (dataset ready)

RTS (request to send)

CTS (clear to send)

RI (ring indicator)

6.6.4 Included in delivery

•

USB-RS232 Adapter

•

DSUB9m to DSUB9f connection cable, pin assignment 1:1, about 1.8m


Voltage sensors

7 Voltage sensors

7.1 Precision high voltage divider (HST3/6/9/12)

Figure 50: precision high voltage divider HST12-3


The HST Series is not designed for working on medium voltage grids!

The normal use of the HST3/ 6/ 9/ 12 series needs a connection to high voltages. To fulfill the safety requirements it is under all conditions absolutely necessary to earth

the case of the HST3/ 6/ 9/ 12 to obtain safety and functionality! Use sufficient cross section of the earthing conductor to match the possible shortcircuit currents!

Connection to voltages of more than 1000V should only be done with the use of external high-voltage high breaking capacity fuses!

To prevent partial discharges the unshielded high-voltage leads of HST must have a distance between each other, to other conductive parts and against earth of at least

25mm (HST3 and HST6) and 50mm (HST9 and HST12)! Don’t touch the highvoltage leads to avoid partial discharges.

Because the measuring inputs of HST are designed for voltages >1000V, the respective safety rules for electrical equipment and installations above 1000V have strictly to be regarded!



Voltage sensors

7.1.2 General

The wide band precision high voltage divider of series HST expand the voltage measuring range of ZES ZIMMER precision power meter LMG for use at nominal voltages over 1000V.

The high voltage inputs are equipped with 2m leads that is attached to the voltage measured against earth. The open leads can be aligned by the customer.

The HST 3 (resp. HST6/9/12) divides DC, AC or any distorted voltages with very high accuracy by the factor 1000 (resp. 2000/3000/4000). The divided voltage is available at the buffered low impedance BNC output. To avoid noise interference it is recommended to use shielded cables to the measuring input of the LMG.

The HST can be delivered in one, two or three channel version as to match the particular measuring task.

The single phase HST is used in single ended systems (e.g. lighting, plasma generation, induction heating, ultrasonic applications). Line to line voltages can be measured as difference between the output signals of the channels. For floating (difference) voltage measuring therewith the 2-phase HST is best suitable.

The HST has been designed for measurements at gas discharge lamps, to measure the high frequency burning voltage and the ignition voltage with high precision. These characteristics enable the use of the HST at frequency inverters with voltage peaks above 1000V. These applications have no risk of surge and transient overvoltages by lightning or switching operations. The voltage peaks in these applications are well definded and are produced by the application itself with a limited energy.

However the HST should be protected by external high voltage high breaking capacity fuses.

A further improvement of operational reliability is possible with external surge arresters. It should be connected on the HST input behind the fuse against earth.


Voltage sensors

7.1.3 Specifications for serial numbers starting with ‘B...’, ‘C...’, ‘D...’

HST3 HST6 HST9 Series

maximum trms input voltage 3.15kV

6.3kV

9.45kV

HST12

12.6kV

maximum peak voltage for full scale input impedance dividing ratio accuracy of dividing ratio influence of power measurement measurement input

10M

5kV

Ω

||50pF

1/1000

10kV 15kV

20M

Ω

||25pF

1/2000

30M

Ω

||22pF

1/3000 max. ±0.08% (45Hz ... 65Hz) typ. ±2% (300kHz; burden<100pF) max. ±0.1% (45Hz ... 65Hz; PF>0.8) typ. ±3% (300kHz; burden<100pF; PF>0.8)

40M

Ω

||20pF

1/4000 one fixed high voltage lead (length 2m) for each channel, earth jack as the common reference point

20kV signal output output burden safety class enclosure size (L x W x H) without cable and connectors weight one BNC socket for each channel min. 500

Ω

; max. 2nF class I; device must be earthed additionally to PE of mains supply cord. robust aluminium case

330mm x 230mm x 110mm approx. 6.1kg

400mm x 230mm x 110mm approx. 7.2kg

mains supply 230V / 50Hz; approx. 20VA

Overvoltage capabilities of high voltage input against earthed case:

No transient overvoltages allowed!


Voltage sensors

7.1.4 Specifications for serial numbers starting with ‘E...’

Series

no. of channels ordering type

1

HST

3-1

HST3

2

HST

3-2

3

HST

3-3

1

HST

6-1

HST6

2

HST

6-2

3

HST

6-3

1

HST

9-1

HST9

2

HST

9-2

3

HST

9-3

1

HST

12-1

HST12

2

HST

12-2

3

HST

12-3

Nominal electrical rating of measuring inputs

Overvoltage capability

of highvoltage input against earthed case

*) voltages in accordance to

EN61010:2010, valid for max.

altitude 2000m over sea level

Mechanical

Other

maximum trms voltage* maximum periodic peak voltage* maximum transient overvoltage* non-repetitive maximum peak voltage* measurement input signal output enclosure size (L x W x H) installation dimension (L x W x H) weight temperature range safety class mains supply maximum sine trms voltage for full scale maximum trms input voltage maximum peak voltage for full scale input impedance dividing ratio measuring accuracy

DC

0.05Hz ... 45Hz

45Hz ... 65Hz

65Hz ... 2.5kHz

2.5kHz ... 10kHz

10kHz ... 100kHz

100kHz...300kHz; conditions for accuracy specifications

3.5kV

4.2kV

5kV

10M

Ω

||50pF

1/1000 tolerance of ratio

20M

Ω

||25pF

1/2000

30M

Ω

||22pF

1/3000 tolerance of phase

5kV

3.8kV

8.8kV

7kV

8.4kV

10kV

10kV

6.8kV

16.8kV

10.5kV

12.6kV

15kV

15kV

8.8kV

23.8kV

14kV

16.8kV

20kV

40M

Ω

||20pF

1/4000 max. ±0.1% max. ±0.1% max. ±0.05% max. ±0.1% max. ±0.2% max. ±0.3% typ. ±2%

-

±0.06°

±0.06°

±0.2°

±0.4°

±0.5°

±2.5°

4.2kV

input voltage from 3% to 100% of maximum trms input voltage output burden min. 1k

Ω

|| max. 1nF

(except min 1k

Ω

|| max. 100pF at 100kHz...300kHz)

8.4kV

12.6kV

16.8kV

20kV

10.2kV

30.2kV

one fixed high voltage lead (length 2m) for each channel, earth jack as the common reference point one BNC socket for each channel robust aluminium case

330mm x 230mm x 110mm 400mm x 230mm x 110mm

490mm x 230mm x 110mm 590mm x 230mm x 110mm approx. 6.1kg

approx. 7.2kg

5...40°C, indoor use only class I; device must be earthed additionally to PE of mains supply cord.

85..265V; 45..65Hz; approx. 20VA


Voltage sensors

7.1.5 Measurement principle HST

Figure 51: principle structure of different HST types

7.1.6 Example wirings

Figure 52: example wirings HST6-2

Two possible example wirings are shown: A two channel measurement in the upper part of the figure and a differential voltage measurement in the lower part of the figure.


Voltage sensors

7.1.7 HST wiring of 3-phase systems

Figure 53: HST wiring of 3-phase systems

On the highvoltage side HST input1, input2 and input3 connects to L1, L2 and L3. All voltage measurements have the same reference potential: earth.

Also isolated sources as these are always bound to earth by their earth capacities can be measured with the earthed HST.

On the low voltage side, the connection to the power meter LMG or other instruments can be done in two different ways:

1. Instruments with internal star-delta conversion are connected like shown in the upper part of the drawing. Advantage is that unbalanced sources are measured correctly, the total power is determined correctly as well as the power of each phase.


Voltage sensors

2. Instruments without star-delta conversion are connected like shown in the lower part of the drawing. The line voltages with reference potential earth can be tapped directly at the BNC jacks. Even with unbalanced sources, the total power is determined correctly.

7.1.8 Included in delivery

• precision high voltage divider (HST)

• about 3m BNC connection cable from HST to the power meter LMG

• adapter BNC to 4mm plugs

7.1.9 Option mounting clips (HST-Z01/Z02)

This option has to be specified at the order, respectively a refitting can be only made by ZES

ZIMMER.

Figure 54: HST mounting clips, Dimensions in mm

Figure 55: HST-Z01

HST

HST3

HST6

Option

HST-Z01

Figure 56: HST-Z02 a

180mm

b

380mm

HST-Z02 250mm 310mm


Voltage sensors

HST9

HST12

HST-Z01 180mm 450mm

HST-Z02 250mm 380mm

7.1.10 Option HST-O1-1 supply connection via IEC320 connector

Supply connection mating to commonly used IEC-320-C13 appliance connectors.

Figure 57: HST-O1-1

7.1.11 Option HST-O1-2 supply connection via NEMA 5-15P connector

Supply connection mating to NEMA 5-15 sockets commonly used in USA.

Figure 58: HST-O1-2

7.1.12 External high-voltage high breaking capacity fuses

Although HV fuse-links are not able to protect the HST in the case of an internal fault, they should be installed. In the case of a fault the HST shall be disconnected from the supply as fast as possible in order to limit the fault effects. This is why HV fuse-links of lowest possible rated currents are recommended.

Possible suppliers of this fuses are:


Voltage sensors

•

SIBA (www.siba.com):

Indoor and outdoor voltage Transformer fuses HHD-BVT,

Voltage transformer fuses HHZ-BVT

•

ABB (www.abb.com):

Indoor voltage transformer fuses WBP,

Outdoor voltage transformer fuses BRT

Fuse selection criterias

Ambient conditions

Rated voltage: 6kV for HST3 and HST6

Rated voltage: 12kV for HST9 and HST12

Rated current: 0.6A to 1A

ZES ZIMMER can not guarantee that the fuses of above mentioned suppliers are suitable for every purpose and application! It is the responsibility of the user to find and install a fuse appropriate to the application.

7.1.13 External surge arrester

To improve the operational reliability the usage of a surge arrester is recommended. With a surge arrester meeting the requirements and placed behind the previously mentioned HV-fuse, overvoltages can be held below the maximum non repetitive peak voltages of the HST.

Possible suppliers of surge arresters are:

•

TRIDELTA (www.tridelta.de)

Medium voltage arrester Series SBK

•

SIEMENS (www.siemens.com)

Medium voltage arrester Series 3EK7

Surge arrester selection criterias

Ambient conditions

Continuos operating voltage at installation point

Temporary overvoltage at installation point

Residual voltage against earth at possible impulse current: max. 8.8kV for HST3 max. 16.8kV for HST6 max. 23.8kV for HST9 max. 30.2kV for HST12


Voltage sensors

ZES ZIMMER can not guarantee that the surge arresters of above mentioned suppliers are suitable for every purpose and application! It is the responsibility of the user to find and install a surge arrester appropriate to the application.


FAQ - frequently asked questions / Knowledge base

8 FAQ - frequently asked questions / Knowledge base

8.1 Example of an error calculation: general derivation

The calculations illustrate how to calculate the errors of U, I or P when using an external sensor. The following parameters of the measurement are given:

The measurement is made with a LMG95, the accuracies of the channels are in

±

(% of measuring value + % of measuring range):

Frequency/Hz 45 to 65

Voltage

Current

0.01+0.02

0.01+0.02

Active Power 0.015+0.02

The clamp with which is measured is the LMG-Z322 with an accuracy of:

Current

10A to 200A

200A to 1000A

1000A to 1200A

Amplitude error

1.5%

0.75%

0.5%

Phase error

2°

0.75°

0.5°

Ratio of 1000:1.

At the I channel we are using a scaling of 1000 to get the correct currents at the display. In the following examples all values are calculated for the primary side, what means on measured signal level. The readings are: f: ϕ

:

P:

U trms

: 230.000V, range 250V ⇒ range peak value 400V

I trms

: 100.000A primary ⇒ 0.1A secondary; range 150mA ⇒ range peak value 469mA calculated back to the primary side: range 150A ⇒ range peak value 469A

50Hz

45°

16.2635kW, range 37.5kW ⇒ range peak value 187.6kW

AC coupling mode for the signal is selected (what means you have no errors because of the

DC offset of the signal).



From the table above the following errors of the LMG95 itself for voltage and current can be determined (using the peak values of the respective measuring range):

∆

U =

±

(0.0

1

% of Rdg.

+ 0.0

2

% of Rng.) =

±

(0.

023

V + 0.

08

V) =

±

0.

103

V

∆

I

LMG

95

=

±

(0.0

1

% of Rdg.+ 0.0

2

% of Rng.) =

±

(

0 .

01

A +

0 .

0938

A) =

±

0 .

1038

A

∆

P

LMG

95

=

±

(0.0

15

% of Rdg.+ 0.0

2

% of Rng.) =

±

(

0 .

00244

kW +

0 .

03752

kW) =

±

0 .

03996

kW

Additional to these three errors there is the error caused by the current clamp. First the amplitude error which will be added to the

∆

I

LMG95

:

∆

I clamp

=

±

(

1 .

5

%

of rdg.

) =

±

1 .

5

A

So you get a total current error of:

∆

I total

=

∆

I

LMG

95

+ ∆

I clamp

=

±

1 .

6038

A

The second error which is caused by the clamp is the error of the additional phase shift of 2°.

This error will influence the active power. In this example the power can be calculated as:

P

=

U * I

* cos ϕ

So the total differential gives you the error:

∆

P clamp

=

∂

∂

P

U

*

∆

U +

∂

∂

P

I

*

∆

I total

+

∂

P

∂ϕ

*

∆ ϕ you get:

∆

P clamp

= I

* cos ϕ

*

∆

U

+

U

* cos ϕ

*

∆

I total

+ −

U

*

I

* sin ϕ

*

∆ ϕ

At this point only the errors of the clamp are used, the errors of the LMG are already calculated:

∆

U=0!

∆

I=

∆

I clamp

∆ϕ

= 2°:

2

°

* 2

π

360

°

=

0 .

035 rad.

For the angles you have to use the radient: 45° =

π

4 rad



∆

P clamp

=

100

A

* cos

π

4

* 0 .

0

V

=

0 .

0

W

+

243 .

95

W

+

+

230

V

* cos

π

4

* 1.5A

−

569 .

22

W

=

813.17W

+

230V * 100A * sin

π

4

* 0.035

At this point the error values caused by the clamp should be marked:

The amplitude error of the clamp 243.95W and the phase shift causes 569.22W, what means

813.17W error are caused by the clamp.

The total error of the active power is:

∆

P total

=

∆

P

LMG

95

+ ∆

P clamp

=

±

( 0 .

03996

kW

+

0 .

81317

kW

)

=

0 .

85313

kW

The relative error of the active power is:

∆

P relative

=

∆

P total

P

=

0 .

0525 5 .

25 %

8.1.1 Improving the accuracy

If you use a current clamp like in this example with a nominal current of 1000A and your current is only 10% what means 100A a simple trick to increase the accuracy is to wind the conductor several times through the clamp. In the example the accuracy of the clamp changes with three windings to 0.75%, because of the primary current of 300A, the phase shift is 0.75°. The next example of calculation is done for three windings:

U trms

: 230.000V, range 250V ⇒ range peak value 400V

I trms

: Scaling

1000

3

=

333 .

333 , what means all current values are divided by 3, even the errors! The ratio of the clamp stays at 1000:1!

Values: 300.000A primary ⇒ 0.3A secondary; range 300mA ⇒ range peak value

0.938A calculated back to the primary side: range 100A ⇒ range peak value 312.7A

f: ϕ

:

P:

50Hz

45°

16.2635kW, range 25kW ⇒ range peak value 125.080kW

∆

U =

±

(0.0

1

% of Rdg.

+ 0.0

2

% of Rng.) =

±

(0.

023

V + 0.

08

V) =

±

0.

103

V

∆

I

LMG

95

=

±

(0.0

1

% of Rdg.+ 0.0

2

% of Rng.) =

±

(

0 .

01

A +

0 .

06254

A) =

±

0 .

07254

A

∆

P

LMG

95

=

±

(0.0

15

% of Rdg.+ 0.0

2

% of Rng.) =

±

(

0 .

00244

kW +

0 .

02502

kW) =

±

0 .

027456

kW



∆

I clamp

=

±

(

0 .

75

%

of primary current

= in this case the " reading"

) =

±

2 .

25

A

, now with the scaling this error is divided by 3 as well, what means:

∆

I clamp

=

±

(

0 .

75

% of Rdg.) =

±

0 .

75

A

∆

I total

=

∆

I

LMG

95

+ ∆

I clamp

=

±

0 .

82254

A

Again the total differential has to be used, but now with the following values:

∆

U=0!

∆

I=

∆

I clamp

∆ϕ

= 0.75°:

0 .

75

°

*

360

°

2

π

=

0 .

013 rad.

With this the error of the clamp of the active power is:

∆

P clamp

=

100

A

* cos

π

4

=

3 33 .

40W

* 0 .

0

V

+

230

V

* cos

π

4

* 0.75A

+

230V * 100A * sin

π

4

* 0.013

∆

P total

=

∆

P

LMG

95

+ ∆

P clamp

=

±

( 0 .

027456

kW

+

0 .

33340

kW

)

=

0 .

360856

kW

The relative error of the active power is:

∆

P relative

=

∆

P total

P

=

0 .

0222 2 .

22 %

With this simple trick the error of the current amplitude could be reduced by 51.2%. The error of the active power even by 42.3%.



8.2 Example of an error calculation: LMG500 with external shunt

Particularly with regard to the standby power measurements compliant to EN62301 and

ENERGY STAR it might be profitable and necessary to use an external shunt to increase the current dynamic and accuracy at low currents. This example shows how to calculate the measuring tolerance of the complete system consisting of LMG500 and the external shunt

LMG-SH100.

•

External shunt

LMG-SH100, 100ohms,

±

0.15%

•

Voltage measurement

Ueff=230V

LMG500 Urange=250V / 400Vpk (range spec.: see documentation of LMG500)

(in 115V supply networks: Urange=130V / 200Vpk, the remaining calculation is the same)

•

Current measurement

Ieff=4mA

LMG500 Irange=5mA / 15.63mApk (range spec.: see documentation of LMG-SHxx)

LMG500 I measuring accuracy:

±

(0.01% of measuring value+0.02% of measuring range)

•

Power measurement

PF=0.1

f=50Hz (or 60Hz)

S=0.92VA

P=92mW

LMG500 Prange=Urange*Irange=400V*15.63mA=6.252W

LMG500 P measuring accuracy:

±


•

Tolerance of current and power measurement

Because the shunt tolerance is a purely scaling error without a term of measuring range, the error analysis can be simplified to the following calculation:

shunt error term LMG error of meas.value LMG error of meas.range

∆

I =

±

( 0.15/100*4mA

=

±

( 6uA

=

±

9.526uA

+ 0.01/100*4mA

+ 0.4uA

+ 0.02/100*15.63mA)

+ 3.126uA)

∆

P =

±

( 0.15/100*92mW

=

±

( 138uW

=

±

777uW

+ 0.015/100*92mW

+ 13.8uW

+ 0.01/100*6.252W)

+ 625.2uW)



8.3 Example of an error calculation: LMG500 with HST3

In this example an error calculation is shown with the LMG500 and HST3 measuring the loss power of a 3000V / 10A / 60Hz, pure sinewave voltage and current / PF=0.3 device under test

•

HST high voltage divider

HST3 scale = 1000:1

HST3 tolerance:

±

0.05% /

±

0.06° @ 45 .. 65Hz

∆ phi_HST3 =

±

0.06°/360°*2*pi =

±

0.001047197551 rad

•

Voltage measurement

Ueff = 3000V / 60Hz

LMG500 Uscale = 1000

LMG500 Urange = (3V / 6Vpk) = 3000V / 6000Vpk

LMG500 U measuring accuracy:

±


•

Current measurement

Ieff = 10A / 60Hz

LMG500 Irange = 10A / 30Apk, direct current input

LMG500 I measuring accuracy:

±


•

Power measurement

PF = 0.3, pure sinewave voltage and current -> phi = acos(PF) f = 60Hz

S = Ueff*Ieff = 30kVA

P = Ueff*Ieff*PF = 9kW

LMG500 Prange = Urange*Irange = 6000V*30A = 180kW

LMG500 P measuring accuracy:

±


Tolerance of voltage and power measurement

∆

U_LMG500 =

±

(0.01/100*3000V + 0.02/100*6000V) =

±

(0.3V + 1.2V) =

±

1.5V

∆

U_HST3 =

±

(3000V*0.05/100) =

±

1.5V

∆∆∆∆

U_total =

±

(

∆

U LMG500 +

∆

U HST3) =

±±±±

3V

∆

P_LMG500 =

±

(0.015/100*P + 0.01/100*Prange) =

±

(1.35W + 18W) =

±

19.35W

with P = U*I*cos(phi)

∆

P_HST3 =

±

( |dP/dU*

∆

U_HST3| + |dP/dI*

∆

I_HST3| + |dP/dphi*

∆ phi_HST3| ) with

∆

I_HST3=0 (current measurement has no influence on voltage measurement)

∆

P_HST3 =

±

( |I*cos(phi)*

∆

U_HST3| + |U*I*sin(phi)*

∆ phi_HST3| )

∆

P_HST3 =

±

( 10A*0.3*1.5V + 3000*10*sin(acos(0.3))*0.001047197551) =

±

34.47W

∆∆∆∆

P_total =

∆

P_LMG500 +

∆

P_HST3 =

±±±±

53.82W


Service/Downloads/Documents/Data-sheets

ZES Sensors and Accessories

for precision power meters

LMG series 90/310/95/450/500

ZES current and voltage sensors and accessories

Content

1 Introduction

2 Current sensors

3 LMG95 connection cables and adapter

4 LMG450 connection cables and adapter

5 LMG500 connection cables and adapter

6 Accessories

7 Voltage sensors

8 FAQ - frequently asked questions / Knowledge base

Related manuals

Table of contents

Service/Downloads/Documents/Data-sheets

ZES Sensors and Accessories

for precision power meters

LMG series 90/310/95/450/500

ZES current and voltage sensors and accessories

Content

1 Introduction

2 Current sensors

3 LMG95 connection cables and adapter

4 LMG450 connection cables and adapter

5 LMG500 connection cables and adapter

6 Accessories

7 Voltage sensors

8 FAQ - frequently asked questions / Knowledge base

Related manuals

ABB

Semidust-tight Door Gasket Kits THG106, THG107, THG108

Zennio

ZN1AC-CST120

Table of contents