SymCom 777-575-FT Installation Instructions Manual

INSTALLATION INSTRUCTIONS

FOR SYMCOM’S OVERLOAD RELAY

MODEL 777-MV-FT

BE SURE POWER IS DISCONNECTED PRIOR TO INSALLATION!

FOLLOW NATIONAL, STATE, AND LOCAL CODES!

READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION!

SymCom’s electronic overload relays are fully programmable for customized protection with a digital readout and RS-485 communications. The 777-MV-FT is designed for use, in conjuction with power transformers and external current transformers, on medium voltage systems. The 777-MV-FT also has a fast linear trip mode.

CONNECTIONS

1. Using the four corner tabs or the DIN rail mounting bracket, mount the

unit near the magnetic contactor. To use the DIN rail bracket,

hook the top clip first, then apply downward pressure until the lower clip

“clicks” onto the rail.

2. External current transformers must be used (see Figure No. 1 and Table

No. 1). SymCom recommends that the external CTs have terminals for

installation convenience. All CTs must be facing the same direction and all

CT secondaries must be wired identically (i.e., all “+” terminal connected

wires must enter the loop window from the same side).

3. Power input to unit may be three-phase or single-phase. Three-phase inputs

to the unit should have instrument transformers with 120 VAC secondaries,

5 VA minimum. A separate power supply potential transformer should be

used to power the contactor coil because its signal will vary as the load is

energized and de-energized.

3.1.Three-phase voltage input: 120V three-phase can be made available by

using three potential transformers in a wye-wye configuration. Reverse

phase, single-phase and unbalance protection is available when

using the wye-wye configuration shown in Figure 2a. The motor will not start

under the above voltage fault conditions. Connect the three-phase power

from the secondary of the potential transformers to “L1”, “L2” and “L3” on the

unit using a #12 - #18 AWG wire.

3.2.Three-phase voltage input: Alternatively, a three-phase voltage input may

be constructed by connecting two potential transformers in an open delta

configuration (See Figure 2b).

2880 North Plaza Drive, Rapid City, SD 57702 • (800) 843-8848

3.3.Single-phase voltage input: If only single-phase, 120V control power is available, insert control power into L1 and L2 inputs (See Figure 2c). L3 does not need to be connected. When single-phase voltage input is used, single-phase faults are detected only after the motor starts and reverse phase protection is not available.

NOTE: VUB setting must be set to “999” for proper operation with single- phase voltage input.

4. Connect the output relay to the circuitry to be controlled (see Figure No. 3).

To control a motor, connect the normally open contact in series with the magnetic coil of the motor starter as shown. To sound an alarm, connect the normally closed contact in series with the alarm (not shown).

FULL LOAD

AMPS

12.5-25

25-50

50-75

75-100

100-150

150-200

200-300

300-400

400-500

500-600

CT RATIO

PASSES THROUGH

777 WITH CT

SECONDARY

MULT PROGRAM SETTING

50:5

50:5

75:5

100:5

150:5

200:5

2

1

1

1

1

1

300:5

400:5

1

1

500:5 1

600:5 1

TABLE NO. 1: EXTERNAL CT SELECTION

25

50

75

100

150

200

300

400

500

600

Operation

The relay operation of SymCom’s overload relays is a fail safe design. This means when everything is within the limits programmed into the unit, the relay will energize; the normally open (NO) contact will close and the normally closed

(NC) contact will open. Once the unit has been wired and programmed, the unit is ready to operate. Turn the mode select to the “RUN” position. The display will show “RUN” alternating with a number (the numbers displayed will be the number corresponding to where the “DISPLAY/PROGRAM” knob is pointed). It will do this for the amount of time programmed into “RD1”. After this time has expired, the relay will energize (normally open will close and normally closed contact will open). If something else is in the display, see the troubleshooting section for more information. If the mode select is taken out of the “RUN” position, the units relay will de-energize.

06/26/03 -2-

-FT

FIGURE 1: TYPICAL WIRING DIAGRAM USING EXTERNAL CTs

NOTE: All potential transformers have 120VAC secondaries. The unit may be installed with three-phase voltage input (Figure No. 2,A & B); for full voltage monitoring and protection. If the single-phase voltage input is used (Figure No. 2, C), the 777-MV is a current monitor only.

FIGURE NO. 2: Potential Transformer Diagrams

-3- 06/26/03

-FT

FIGURE NO. 3: Typical control wiring diagram

PROGRAMMING

1. Select the feature to program by

rotating the “MODE SELECT” switch

to the desired position. The “MULT”

setting must be programmed before

any of the current settings to ensure

proper display of actual current

setpoints. Therefore, SymCom

-FT

recommends programming the “LV”

setting first, then move clockwise

through the postions to complete the

process.

2. Push and hold the RESET / PROGRAM button.

3. Rotate the DISPLAY / PROGRAM adjustment to the desired setting of the

feature as shown in the LED display.

4. Release the RESET / PROGRAM button. The unit is programmed when the

button is released.

5. Continue steps 1-4 until all features are programmed.

NOTE: Some “MODE SELECT” positions are dual functioning such as the

“#RU / ADDR” position. When the “MODE SELECT” switch is pointed at “#RU / ADDR,” you may view and program “#RU” and “ADDR.” To view the two settings rotate the “DISPLAY / PROGRAM” adjustment

across its entire range. You will see the “#RU” setting when the

“DISPLAY / PROGRAM” adjustment is between approximately 7 o’clock and 11 o’clock. You will see the “ADDR” setting when the “DISPLAY/PROGRAM”adjustment is between approximately

11 O’Clock and 5 o’clock. To program “#RU” or “ADDR,” follow the programming instructions above. The “#RU” setting will only be programmed when the “DISPLAY / PROGRAM” adjustment is between

approximately 7 o’clock and 11 O’Clock. Likewise, the “ADDR” setting will only be programmed when the “DISPLAY/PROGRAM”adjustment is between approximately 11 o’clock and 5 o’clock. “ADDR” settings will

06/26/03

be an “A” followed by a number between 1 and 99.

-4-

FAST LINEAR TRIP MODE

The Fast Linear Trip Mode provides an adjustable linear trip that can be used for very quick or very slow trips. The Model 777-FT family offers superior protection for sensitive motors, quick trips in test panels, and fast trips to protect high torque systems.

When the Fast Linear Trip Mode is activated (TC = J00), two new parameters,

“Motor Acceleration” time and “OverCurrent Trip Delay” are viewed and programmed in the RD1 and RD2 positions. The RD1 and RD2 setpoints are still valid, but can only be viewed and programmed by setting the trip class to any other class other than J00.

Note: Ensure Trip Class is set appropriately when changing RD1, RD2, MA,

or OCTD.

When the Fast Linear Trip Mode is used, the restart delays (RD1, RD2, and RD3) will be reduced by approximately 50%. Example: RD1 setting = 010; RD1 time = 5

PROGRAMMABLE PARAMETERS

NOTE: The unit can be programmed prior to installation by applying

120VAC to terminals ‘L1’ and ‘L2’.

The programmable parameters are the values the user must program to provide the correct protection for the application. All parameters are actual values except the “VUB” and “CUB’ settings, which are percentages. The range these parameters can be programmed to is found in the specifications at the end of the manual.

THE FOLLOWING ARE GENERAL RECOMMENDATIONS. THE MOTOR

MANUFACTURUR SHOULD BE CONSULTED FOR EXACT SETTINGS.

LV/HV-The recommended settings for “LV” (low voltage) and “HV” (high

voltage) depend on many factors such as motor usage, motor size,

environmental factors and tolerance of the motor. The motor

manufacturer should be consulted for “HV” and “LV” settings.

However, the NEMA MG1 standard recommends that “LV” and “HV” be

set to no more than 10% of the motor’s nameplate voltage. The setting

can be determined by multiplying the motor’s nameplate voltage by the

recommended percent over and under voltage (eg. The motor name

plate voltage is 4160 V. Potential transformer(s) is 4160V/120V.

Therefore, set “LV” to 0.9 x 120 = 108 and “HV” to 1.10 x 120 = 132).

“LV” can not be set higher than “HV”, so “HV” may have to be adjusted

higher before the proper “LV” setting can be programmed.

VUB- “VUB” is the voltage unbalance trip point. The NEMA MG1 standard

does not recommend operating a motor above a 1% voltage unbalance

without derating the motor. Voltage unbalance is determined from the

following formula:

-5- 06/26/03

Percent Unbalance =

Maximum Deviation from the Average

Average x 100

Example: The measured line-to-line voltages are 203, 210, and 212.

3

= 208.3

The maximum deviation from the average is the largest difference between the average voltage (208.3) and any one voltage reading.

208.3 - 203 = 5.3

210 - 208.3 = 1.7

212 - 208.3 = 3.7

The maximum deviation from the average is 5.3.

5.3

208.3

x 100 = 2.5% Unbalance

Note: A setting of “999” in this position will disable reverse phasing, single

phasing, and voltage unbalance protection. This setting should be

used when single-phase voltage control power is used. Single phase

faults will only be detected from current measurements after the

motor starts.

MULT- “MULT” is the multiplication factor for determining true current settings

based on current transformer ratio of external CTs. The appropriate

number can be determined from Table No. 1 on page 2. “MULT” must be

correctly programmed in order to accurately program the current settings.

OC- Represents the manufacturer’s maximum Service Factor Amperage (SFA).

The “OC” (overcurrent) setting depends on many factors such as motor

usage, motor size, environmental factors and tolerance of the motor. The

motor manufacturer should be consulted for “OC” settings. However, “OC”

is typically between 110% and 125% of Full Load Amperage (FLA).

UC- The “UC” (undercurrent) setting is typically set to 80% of full load

amperage (FLA). The overload relay with a “UC” setting of 80% of FLA

will typically detect a loss of load for many pumps and motors such as

a dry well condition for submersible pumps. The “UC” setting may be set

to 0.00 to disable undercurrent (loss of load) protection.

CUB- “CUB” is the current unbalance trip point. Most motor manufacturers

recommend operating under no more than 5% current unbalance,

therefore, a setting of “5” is a good place to start. However, your motor

manufacturer should be contacted for exact settings.

Note: Current unbalance is calculated the same way as voltage unbalance.

Note: A setting of “999” in this position will eliminate single phasing and

current unbalance protection.

TC- “TC” designates the trip class for overload protection. The trip class

defines the trip delay when an overload is detected. Trip class is

determined by the type of motor and application. Your motor manufacturer

should be consulted for the proper setting. Table No. 2 on page 9 shows

the trip class and a general description of the applications.

06/26/03 -6-

RD1- “RD1” is the rapid cycle timer. To view and adjust RD1, TC must not be

J00. It will engage when the motor is first powered-up or after the motor

controls shut down the motor. An “RD1” setting of 20-30 minutes will

generally protect the motor from rapid, successive power outages or short

cycling caused by the motor controls. A setting of 0 minutes will allow the

motor to start immediately after power-up or after a normal shutdown.

Note: In linear trip mode (TC = J00), the RD1 time is appoximately 50% of

the normal RD1 time. Example: If RD1 is set to 10 minutes, the

TC = J00, then the actual RD1 time in the linear trip mode will be 5

minutes.

Note: Display increments by 2.

RD2- “RD2” is the restart delay after the overload relay trips on current unbalance,

single phasing, and overload (if “oc” is programmed in “#RF”). To view and

adjust RD2, TC must not be J00. This delay allows the motor to cool down

after experiencing the above faults. It is also known as a motor cool down

timer. Your motor manufacturer should be contacted to determine this

setting. Under normal circumstances, a setting of 30-60 minutes will give

the motor enough time to cool down between faults. The Motor

Manufacturer should be consulted for their recommendation.

MA- In linear trip mode (TC = J00), the RD1 position becomes the motor

acceleration time. To view and adjust MA, TC must be J00. The motor

acceleration time is related to the load on a motor. For high inertia loads

such as fly wheels or conveyor systems, the motor acceleration time is

considerably longer than low inertia loads such as submersible pumps.

Therefore, “MA” is typically set higher for high inertia loads and lower for

low inertia loads. During the motor acceleration time, the linear overcurent

trip feature is ignored. Therefore, it is important not to set “MA” too high

because damage could occur to the motor. The minimum MA time is

0.158 seconds. The actual MA time is the display value times 0.158

seconds (±0.315 seconds). Example: If MA is set to 60, MA Time = (60 x

0.158 seconds) = 9.48 seconds ±0.315 seconds.

Note: In linear trip mode (TC = J00), the RD2 time is appoximately 50% of

the normal RD2 time. Example: If RD2 is set to 10 minutes, the

TC = J00, then the actual RD2 time in the linear trip mode will be 5

minutes.

OCTD- In linear trip mode (TC = J00), the RD2 position becomes the

Overcurrent Trip Delay. To view and adjust OCTD, TC must be

J00. This setting represents the maximum time that the

Model 777-MV-FT will tolerate an overcurrent condition before tripping.

The minimum OCTD time is 0.158 seconds. The actual OCTD is the

display value times 0.158 seconds (±0.315 seconds). Example: If

OCTD is set to 6, OCTD = (6 x 0.158 seconds) = 0.948 seconds ±0.315

seconds.

-7- 06/26/03

RD3- “RD3” is the restart delay after an undercurrent. It is also known as a dry

well recovery timer and is usually used in submersible pumping

applications. The setting of “RD3” depends on the recovery time of the

water well and varies widely from application to application.

Note: In linear trip mode (TC = J00), the RD3 time is appoximately 50% of

the normal RD3 time. Example: If RD3 is set to 30 minutes, the

TC = J00, then the actual RD3 time in the linear trip mode will be 15

minutes.

#RU- “#RU” is the number of successive restart attempts allowed after an under

current fault before the overload relay requires manual reset. A setting of

“0” is manual reset and a setting of “A” is continuously automatic reset.

ADDR-“ADDR” is the address setting for RS-485 communications. Available

settings are from A01 - A99. This setting is programmed on the right half

of the PROGRAM/DISPLAY adjustment (see programming instruction

note for explanation of dual function settings). You may ignore this

setting if RS-485 communications are not used.

#RF- “#RF” is the number of successive restart attempts allowed after a current

unbalance, single phasing or overload fault. The following settings are

available: “0”, “1”, “oc1”, “2”, “oc2”, “3”, “oc3”, “4”, “oc4”, “A”, and “ocA”.

A setting which includes “oc” will allow the overload relay to automatically

reset after an overload fault (eg., a setting of “oc2” will allow the overload

relay to reset 2 times after an overload condition, current unbalance, or

single phasing before locking out if an overload condition, current

unbalance, or single phasing is detected within one minute after

restarting). A setting which does not include “oc” requires a manual reset

for all overload faults. A setting of “0” is manual reset and a setting of “A”

is continuously automatic restart.

UCTD-“UCTD” is the undercurrent trip delay timer. This setting represents the

maximum time that the Model 777-MV-FT will tolerate an under current

condition. Typically, UCTD is set to 2 - 4 seconds.

GF- “GF” is the ground fault protection amperage threshold. This setting

detects a leakage current to ground and signals an insulation breakdown

in the system. The “GF” setting should be some where between 10% and

20% of the full load motor current. Short circuit protection is provided by

separate branch protective devices such as circuit breakers or fuses.

Ground fault protection is a Class II ground fault protector and should not

be used for personnel safety, but can be used to indicate motor

degradation for maintenance purposes.

06/26/03 -8-

Trip Class

5

10

15

20

30

J Prefix

J00

Application Description

Small fractional horsepower motors where acceleration times are almost instantaneous or where extremely quick trip times are required.

(Fast Trip) Hermetic refrigerant motors, compressors, submersible pumps, and general purpose motors that reach rated speed in less than 4 seconds.

Certain specialized applications.

(Standard Trip) Most NEMA-rated general purpose motors will be protected by this setting.

(Slow Trip) Motors with long acceleration times (>10 seconds) or high inertia loads.

Programming any of the above trip classes with the J prefix will enable jam protection. This additional protection is enabled 1 minute after the motor starts and provides a 2-second trip time for motors exceeding 400% SFA, regardless of trip class.

(Fast Linear Trip Mode) This setting provides an adjustable linear trip that can be used for very quick or very slow trips. This is used for sensitive motors, quick trips in test panels, and fast trips to protect high torque systems.

TABLE NO. 2: TRIP CLASS DESCRIPTIONS

10000

1000

100

10

Class 30

Class 20

Class 15

Class 10

Class 5

1

0 100 200 300 400 500 600

% of OC Setting

700 800 900 1000

FIGURE NO. 4: OVERLOAD TRIP CLASSES AND TRIP TIMES

PROGRAMMING EXAMPLES

#1 - Motor To Be Protected: 3∅, 4160 Volt, 400 Hp vertical hollow shaft pump

with a full load amperage of 56.2A and maximum service factor amps of

61.6. Three potential transformers (4160/120) have been installed in a

wye-wye configuration to allow three-phase voltage protection. This

voltage monitoring will disable the motor from starting on reverse-phase,

single-phase or unbalanced conditions. Use the following calculations and

reasoning to determine the appropriate settings for this application.

-9- 06/26/03

LV- 120 x 0.90 = 108

HV- 120 x 1.10 = 132

VUB- VUB = 5

MULT- From Table No. 1, MULT = 75 with 75:5 CTs

OC- Service Factor Amperage = 61.6

UC- FLA x 0.80 = 56.2 x 0.80 = 45.0

CUB- Manufacturer suggests 5

TC- TC = 010 (To program RD1 and RD2), then TC = J00

RD1- To protect the pump from rapid cycling and reduce the number of

starts per hour, RD1 = 10 (Display value) x 0.5 = 5 Minutes.

RD2- Since the motor is large it will cool off slowly, RD2 = 60 x 0.5 = 30

Minutes.

MA- MA = 64 (Displayed value) x 0.158 = 10.1 Seconds.

OCTD- OCTD = 10 (Displayed value) x 0.158 = 1.58 Seconds.

RD3- The well history shows that it will fully recover in 2 hours.

RD3 = 240 x 0.5 = 120 Minutes

#RU- In this application, we know that the well will eventually recharge

itself, #RU = A.

#RF- This well is known for sand to jam the impeller, therefore “oc”

should be included so that the pump will attempt to automatically

restart after an overloaded condition. History shows that 1 start

attempt usually clears the sand out of the impeller. #RF = oc1

UCTD- UCTD = 10

GF- Because it may take several days to get a new pump motor and

schedule for maintenance personnel to remove and replace the

pump motor, GF setting of 10% of full load amperage will give the

well owner enough time to prepare for pump replacement.

GF = 56.2A x 0.10 = 5.6

#2- Motor To Be Protected: 3∅, 4160 Volt, 200 Hp air compressor with a full

load amperage rating of 27A and maximum service factor amps of 30. One

4160/120 potential transformer is used for control power. Voltage monitoring

and reverse phase protection is not implemented. Use the following

calculations and reasoning to determine the appropriate settings for this

application.

LV- 120 x .9 = 108

HV- 120 x 1.1 = 132

VUB- Since L3 is not connected, VUB = 999

MULT- From Table No. 1, MULT = 50 with 50:5 CTs

OC- Service Factor Amperage = 30

UC- FLA x 0.80 = 27A x 0.80 = 21

CUB- Standard NEMA motor = 5

TC- General purpose motor = 20

RD1- Since this compressor takes about 60 seconds to bleed off excess pressure after a shutdown, setting RD1 = 002 will allow the compressor to unload before being restarted.

RD2- Because the motor may be hot from running in an unbalance or

06/26/03

single phase condition, a motor cool down time of 10 minutes,

-10-

RD2 = 10, should be appropriate.

RD3/#RU-Because an undercurrent would signal a serious problem in this application (a broken shaft or belt), #RU should be set = 0 for a manual reset. Therefore, RD3 does not have any function.

#RF- Because an overload (overcurrent) fault signals a serious problem in this application (e.g., worn bearings), “oc” should

not

be included in the #RF setting so that a manual reset after an overload fault is required. A #RF= 1 will give the system 1 chance to recover from an unbalance or single phasing problem before manual reset is required.

UCTD- Setting UCTD = 5 will allow normal operation and not allow the motor to run too long in an undercurrent failure mode.

GF- A ground fault setting of 15% of full load amps will be a significant indicator that the motor should be evaluated for repair or replacement. Therefore, GF = 27A x 0.15 = 4.0.

MULTI-FUNCTION SYSTEM DISPLAY

The output display can show various system operating parameters:

•

L1-L2 Voltage •L2-L3 Voltage •L3-L1 Voltage •Average Voltage

•

Average Current

•

A∅ Current •B∅ Current •C∅ Current

When the “MODE SELECT” switch is in the “RUN” position, the LED will display one of the above operating parameters. To select or change the displayed parameter, turn the “DISPLAY / PROGRAM” adjustment to the desired position as shown on the label.

The multi-function display also announces system faults such as low voltage, high voltage, single phasing, unbalance, and reverse phasing errors. Any time the “MODE SELECT” switch is in the “RUN” position, the “RESET / PROGRAM” button may be pushed to view the last fault which occured. Table No. 3 shows the possible messages.

DISPLAYED MESSAGE

oc

SP ub uc

CF

GrF

HI

Lo rP oFF

MEANING

Tripped on Overcurrent

Tripped on Single-Phasing

Tripped on Unbalance

Tripped on Undercurrent

Tripped on Contactor Failure

(Current Unbalance without Voltage Unbalance)

Tripped on Ground Fault

Preventing the motor from starting due to High Voltage

Preventing the motor from starting due to Low Voltage

Preventing the motor from starting due to Reverse Phasing

A stop command was issued from a remote source

TABLE NO.3: DISPLAY MESSAGES

-11- 06/26/03

TROUBLESHOOTING

PROBLEM

The unit will not start.

Display alternates “rP” with the

“DISPLAY / PROGRAM’ switch value.

SOLUTION

The voltage inputs are reverse phased. If this is the initial start up, swap the “L1” and “L3” leads to correct the problem. If the overload relay has been previously running, the power system has been reverse phased. Check the phase sequence of the incoming power lines.

The unit will not start.

Display alternates “SP”, “uB”,

“HI”, or “Lo with “DISPLAY /

PROGRAM” switch parameter value.

Display alternates “SP”, “uB”, or “oc” with “RUN”.

Display alternates “uc” with

“RUN”.

Display is showing a solid “SP”,

“uB”, or “oc”.

Display is showing a solid “uc”.

Display is showing a solid “CF”.

The incoming voltage is not within the limits programmed in the

“VUB”, “HV”, and “LV” settings. Adjust the “DISPLAY /

PROGRAM” switch to read the incoming line voltage values.

Correct the incoming power problem and check programmed limits to verify they are correct.

The overload relay has tripped on the fault shown on the display and is timimg down “RD2” before restarting.

The overload relay has tripped on undercurrent and is timing down “RD3” before restarting. If undercurrent is not a normal condition for this installation, check for broken shafts, broken belts, etc.

The unit has tripped on the fault shown and manual reset is required because of the programmed setting in”#RF”. Check the system for problems that would produce the single phase, overload, or current unbalance fault like a jam.

The unit has tripped on undercurrent and a manual reset is required because of the setting in “#RU”. Check the system for problems that would produce a loss of load like a broken belt or a pump is out of liquid.

The unit has tripped on a single phasing of the current, but was not single phased by the incoming power. Check for damaged contacts or loose wiring.

Any questions or comments call SymCom at 1-800-843-8848 or

1-605-348-5580

06/26/03 -12-

COMMUNICATIONS PORT / REMOTE RESET

The Model 777-MV-FT comes standard with a 9-pin sub-D connector for remote communications. The Model 777-MV-FT supports the RS-485 communication standard using the MODBUS protocol. This standard allows up to 99 Model 777-

MV-FTs to be controlled and monitored from a single remote personal computer.

Control and monitoring is also possible from SymCom’s RM-1000 and RM-2000.

PLC and SCADA systems using the RS-485 standard and MODBUS protocol can also be used.

NOTE: An RS-485MS-2W module is required to operate the communications bus. (Refer to RS-485MS-2W Installation Instructions for more information on this subject). The communications port also provides connections for remote reset as shown in Figure No. 6.

5 4 3 2

9 8 7 6

1

Normally Open Push Button

FIGURE NO. 6: REMOTE RESET CONNECTIONS

-13- 06/26/03

CLEARING LAST FAULT

The last fault stored can be cleared on the unit. This procedure is outline as follows:

1. Rotate the Mode Select Switch to GF .

2. Press and hold the Reset/Program Button. Adjust the Display/Program

adjustment until cLr appears on the display. Release the Reset/

Program Button.

To verify the last fault was cleared, place the Mode Select switch in the Run position. Then press and hold the Reset/Program Button, cLr should be on the display.

TAMPER GUARD

The unit can be protected from unauthorized program changes by locking in the setpoints.

This procedure is outlines as follows:

1. Rotate the Mode Select switch to GF .

2. Rotate Display/Program adjustment fully clockwise.

3. Press and hold the Reset Button. Adjust the Display/Program

adjustment until Loc appears in the display.

4. Release the Reset Button.

5. Turn Mode Select switch to run .

The program is now locked, but all settings can be viewed. The unit can be unlocked by following the procedure above except step three. This step should say: Press and hold the Reset Button. Adjust the Display/Program adjustment until unL appears in the display.

SymCom warrants its microcontroller based products against defects in material or workmanship for a period of five (5) years* from the date of manufacture. All other products manufactured by

SymCom shall be warranted against defects in material and workmanship for a period of two (2) years from the date of manufacture. For complete information on warranty, liability, terms, and conditions, please refer to the SymCom Terms and Conditions of Sale document.

* The 520 Series has a one (1) year warranty and the LSRU series has a two (2) year warranty.

06/26/03 -14-

SPECIFICATIONS

ELECTRICAL

Input Voltage

Frequency

Motor Full Load Amp Range

115 - 230 VAC, 1∅ OR 115 - 230, 3∅

(Programmable)

50 - 60 Hz

12.5 - 600 Amps, 3∅ (external CT’s)

Power Consumption

Output Contact Rating SPDT (Form C)

10 W (Maximum)

Pilot Duty Rating: 480 VA @ 240 VAC

General Purpose: 10 A @ 240 VAC

Expected Life

Mechanical

Electrical

Accuracy at 25 o

C (77 o

F)

Voltage

Current

GF Current

1 x 10

6

Operations

1 x 10

±1%

5

Operations at rated load

±3% plus CT accuracy

Timing

Repeatability

Voltage

±15%

5% ±1 second

±0.5% of nominal voltage

Current ±1% of nominal current

TRIP TIMES (Those not shown have user selectable trip times)

Ground Fault

101-200% of Setpoint

201-300% of Setpoint

301-400% of Setpoint

401% or Greater of Setpoint

Current Unbalance

1% Over Setpoint

2% Over Setpoint

3% Over Setpoint

4% Over Setpoint

5% Over Setpoint

6% Over Setpoint

10% Over Setpoint

15% Over Setpoint

SAFETY MARKS

UL

CE

Trip Time

8 Seconds ±1 Second

4 Seconds ±1 Second

3 Seconds ±1 Second

2 Seconds ±1 Second

Trip Time

30 Seconds

15 Seconds

10 Seconds

7.5 Seconds

6 Seconds

5 Seconds

3 Seconds

2 Seconds

UL508, UL1053

IEC60947-1, IEC60947-5-1

-15- 06/26/03

Standards Passed

Electrostatic Discharge (ESD)

Radio Frequency Immunity (RFI),

Conducted

IEC 1000-4-2, Level 3, 6 KV Contact, 8 KV Air

IEC 1000-4-6, Level 3 10 V/M

Radio Frequency Immunity (RFI), Radiated IEC 1000-4-3, Level 3 10 V/M

Fast Transient Burst IEC 1000-4-4, Level 3, 3.5 KV Input Power

Surge

IEC

ANSI / IEEE

Hi-Potential Test

Vibration

Shock

1000-4-5

Level 3, 2 KV Line-to-Line

Level 4, 4 KV Line-to-Ground

C62.41 Surge and Ring Wave Compliance to a

Level of 6 KV Line-to-Line

Meets UL508 (2 x Rated Voltage + 1000 Volts for

1 Minute

IEC 68-2-6, 10-55 Hz, 1 mm Peak-to-Peak, 2

Hours, 3 Axis

IEC 68-2-27, 30 G, 3 Axis, 11 mS Duration, Half

Sine Pulse

MECHANICAL

Dimensions

Terminal Torque

Enclosure Material

3.0” H x 5.1” D x 3.6” W

7 inch/pounds

Weight

Maximum Conductor Size Through Unit

ENVIRONMENTAL

Polycarbonate

1.2 pounds

0.65” with insulation

Temperature Range

Pollution Degree

Class of Protection

Ambient Operating: -20 o

- 70 o

C (-4 o

- 158 o

F)

Ambient Storage: -40 o

- 80 o

C (-40 o

- 176 o

F)

3

IP20, NEMA 1

06/26/03 -16-

PROGRAMMABLE OPERATING POINTS

LV- Low Voltage Threshold

HV - High Voltage Threshold

VUB - Voltage Unbalance Threshold

MULT - CT Ratio (xxx:5)

OC - Overcurrent Threshold

UC - Undercurrent Threshold

CUB - Current Unbalance Threshold

TC - Overcurrent Trip Class

**

RD1 - Rapid Cycle Timer

MA - Motor Acceleration Timer

RD2 - Motor Cool Down Timer

OCTD - Overcurrent Trip Delay (Linear)

RD3 - Dry Well Recovery Timer

#RU - Number of Restarts After UC Fault

ADDR - RS-485 Address

#RF - Number of Restarts After All Faults

Except UC

***

UCTD - Undercurrent Trip Delay

GF - Ground Fault Current Threshold

85 V - HV Setting

LV Setting - 264 V

2 - 15% or 999 (OFF)

25 - 600 Ratio

40 - 120% of CT Ratio

0, 20 - 100% of CT Primary

2 - 25% or 999 (OFF)

5, J5, 10, J10, 15, J15, 20, J20, 30, J30, or J00

0, 2 - 500 Minutes (x 0.5 if TC = J00)

0 - 250 x (0.158 through 0.315) Seconds

2 - 500 Minutes (x 0.5 if TC = J00)

2-250 x (0.158 - 0.315) Seconds

2 - 500 Minutes (x 0.5 if TC = J00)

0, 1, 2, 3, 4, or A (Automatic)

A01 - A99

0, 1, oc1, 2, oc2, 3, oc3, 4, oc4, A, or ocA

2 - 60 Seconds

10 - 20% of CT Primary or OFF

NOTES: SymCom’s Overload Relay can be preprogrammed prior to installation by applying

120 VAC between the L1 and L2 terminals.

** If J Prefix is displayed in trip class setting, jam protection is enabled.

*** If “oc” is displayed in the #RF setting, then Over Current will be included as a

normal

fault and the relay will automatically restart after RD2 expires, otherwise, manual

reset is required after an Over Current fault.

-17- 06/26/03

DIMENSIONS

������ ������

������

�������

������

�������

������

�������

DISPLAY MESSAGE

SYMCOM, INC.

800-843-8848 RAPID CITY, SD

������ �������

������ �������

������ �������

������

�������

�� ������ �������

������

��������

������

��������

06/26/03

������ �������

������ �������

-18-

INDEX

Clear Last Fault

Communications Port

Connections

Dimensions

Fast Linear Trip Mode

Multi-Function System Display

Operation

Programmable Operationg Points

Programming Examples

Programmable Parameters

Programming

Remote Reset

Specifications

Tamper Guard

Troubleshooting

Warranty

15

14

12

14

9

5

4

13

5

11

2

17

14

13

1

18

Visit our website at www.symcominc.com for our complete catalog and new product listings!

2880 North Plaza Drive, Rapid City, SD 57702

Phone: (800) 843-8848 or (605) 348-5580

FAX: (605) 348-5685