Install Instructions

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INSTALLATION INSTRUCTIONS FOR SYMCOM’S

MOTORSAVER MODEL 355

BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!!

FOLLOW NATIONAL, STATE AND LOCAL CODES!

CONNECTIONS

1. Mount the MotorSaver in a convenient location in or near the motor control panel. If the location is

wet or dusty, then MotorSaver should be mounted in a NEMA 4 or 12 enclosure.

2. Connect the three lines of the motor's three-phase power to L1, L2 and L3 on MotorSaver’s terminal

strip (see Figure No. 1).

3. Connect the output relay to the circuitry to be controlled (see Figure No. 1).

(A) To control a motor: Connect the normally open contact in series with the magnetic coil of the

motor starter as shown in Figure No. 1(A).

(B) To sound an alarm: Connect the normally closed contact in series with the alarm as shown in

Figure No. 1(B).

FIGURE NO. 1: TYPICAL WIRING DIAGRAMS

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

222 Disk Drive, Rapid City, SD 57701

(800) 843-8848 www.symcom.com

Summary of content (4 pages)

PAGE 1
INSTALLATION INSTRUCTIONS FOR SYMCOM’S MOTORSAVER MODEL 355 BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION!! FOLLOW NATIONAL, STATE AND LOCAL CODES! CONNECTIONS 1. Mount the MotorSaver in a convenient location in or near the motor control panel. If the location is wet or dusty, then MotorSaver should be mounted in a NEMA 4 or 12 enclosure. 2. Connect the three lines of the motor's three-phase power to L1, L2 and L3 on MotorSaver’s terminal strip (see Figure No. 1). 3.
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SETTINGS 1. LINE VOLTAGE ADJUSTMENT: Rotate the LINE VOLTAGE ADJUSTMENT to the nominal three-phase line voltage feeding the motor to be protected. 2. RESTART delay: Rotate the RESTART delay to the desired position. The restart delay is the time between MotorSaver seeing acceptable power and MotorSaver closing its output contacts. For compressor applications, the restart delay should be set for the approximate time it takes for the head pressure to bleed off of the compressor.
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TROUBLESHOOTING SYMPTOM SOLUTION RUN LIGHT does not blink on initial power-up and all three fault lights are on. Check RESTART DELAY adjustment. If the RESTART DELAY is set to "MAN", the Model 355 is in manual restart mode. Turn the RESTART DELAY to "2" for several seconds until the output contacts close. No LEDs are lit. The unit seems completely dead. Measure the three line-to-line voltages.
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SPECIFICATIONS 3-Phase Line Voltage (specify voltage range) Frequency MODEL 355 190 - 240, 380 - 480 or 475-600 VAC 50* - 60 Hz Operating Points Low Voltage (% of set point) Trip Reset High Voltage (% of set point) Trip Reset Voltage Unbalance (NEMA) Trip Reset Trip Delay Time Low Voltage, High Voltage and Unbalance Faults Single Phasing Faults (>25% UB) Restart Delay Time After a Fault After a Complete Power Loss 90% ±1% 93% ±1% 110% ±1% 107% ±1% 2% - 8% Adjustable Trip Setting minus 1% 2-30 Seconds Ad