Symcom 601 Installation Guide

INSTALLATION INSTRUCTIONS FOR SYMCOM'S

MODEL 601 VOLTAGE MONITOR RELAY

BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!!

FOLLOW NATIONAL, STATE AND LOCAL CODES!

READ THESE INSTRUCTIONS ENTIRELY BEFORE

INSTALLATION.

CONNECTIONS

1. Using the four corner tabs OR the DIN rail mounting bracket, mount the Model 601 securely in the
panel. To use the DIN rail bracket, hook the top clip first, then apply downward pressure until the
lower clip "clicks" onto the rail, then stop applying downward pressure.

2. Connect the three-phase power from the line side of the contactor to "L1", "L2" and "L3". First
carefully strip and insert a #12 - #18 AWG wire into the top of the terminal marked L1 and tighten
the screw on the front of the relay. Then, connect the other end of the wire to the line side of the
contactor. Repeat these two steps for L2 and L3. (see Figure No.1).

3. Connect the output relay to the circuitry to be controlled (see Figure No. 1). 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 nor mally closed contact in series with the alar m.

Figure No. 1: Typical Wiring Diagrams

2880 Nor

th Plaza Drive, Rapid City, SD 57702 • 800-843-8848

PROGRAMMING

1. Select the feature to program by rotating the "MODE SELECT" switch to the desired position.

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 Model 601 is programmed when the button is released.

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

SUGGESTED SETTINGS (Consult the Motor Manufacturer for their recommendations.)

V/HV-

L

VUB- "VUB" is the voltage unbalance trip point. The NEMA MG1 standard does not recommend

LF- "LF" setting is the Lo

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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 nameplate voltage is
230 V, set "LV" to 0.9x230=207, set "HV" to 1.10x230=253) "LV" can not be set higher than

"HV", so "HV" may have to be adjusted higher before the proper "LV" setting can be programmed.

operating a motor above a 1% voltage unbalance without derating the motor. Voltage unbalance
is determined from the following formula:

% Voltage Unbalance = [(Maximum Deviation from the Average) / Average] x 100%

The NEMA MG1 standard also recommends against operating a motor above a 5% voltage
unbalance under any circumstances. Therefore, a setting of "5" is a good place to start but
SymCom recommends consulting the motor man

Note: A setting of "999" in this position will eliminate voltage unbalance protection.
Single phase protection is still active for unbalances in excess of 15%.

requency Trip threshold. The NEMA MG1 standard recommends

w F
against oper
On a 60Hz system, 60 x .95 = 57Hz.

ating a motor on a supply with more than

uf

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or specific tolerances.

acturer f

ar

5% v

±

iation in frequency.

HF- "HF" setting is the High Frequency Trip threshold. Using the NEMA MG1 standard on a 60Hz

system, "HF" = 60 x 1.05 = 63Hz.

TD1- "TD1" is the Trip Delay time for voltage and frequency faults. This includes voltage unbalance,

TD2- "TD2" is the Trip Delay time for single-phasing faults.A setting of 2-4 seconds is a good place to start.
RD1- "RD1" is the rapid cycle timer. It will engage when the MotorSaver is first powered-up. An "RD1"

RD2- "RD2" is the restart delay after a fault occurs. This delay allows the motor to cool down after

#RF- "#RF" is the type of reset after a fault. A setting of "0" is manual reset and a setting of "A" is

ADDR- "ADDR" is the address setting for RS485 communications. Available settings are from A01 - A99.

1LFT,2LFT, 3LFT, 4LFT- These positions are the last four faults stored in memory. Note: The motor

low voltage, high voltage, low frequency and high frequency. A setting of 5-10 seconds is
normally a good place to start for these types of faults.

setting of 20-30 seconds will generally protect the motor from rapid, successive power outages.
A setting of 0 seconds will allow the motor to star t immediately after power-up.

experiencing a fault. It is also known as a motor cool down timer.Your motor manufacturer
should be contacted to determine this setting. Under nor mal circumstances, a setting of 300
seconds will give the motor enough time to cool down between faults.

continuously automatic.

You may ignore this setting if RS485 communications are not used.

will be shut down when accessing these positions. Also, the last fault may be displayed by
pushing the "RESET" button at any time during normal operation.

MULTI-FUNCTION SYSTEM DISPLAY

The output display can show various system operating parameters:

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

• % Voltage Unbalance • L3-L1 Voltage • Line Frequency
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 its label.

The multifunction display also announces system faults such as low voltage, high voltage, single
phasing, voltage 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
occurred. The table on page 4 shows the possible messages.To view the previous faults, rotate the
"MODE SELECT" switch to the corresponding last fault. NOTE:Rotating the "MODE SELECT"
switch out of the run position will de-energize the Model 601's contacts and shut down the motor.

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