INSTALLATION INSTRUCTIONS 201A-AU 201-575-AU II_201A-AU_B1 MODELS Revision B1 Rapid City, SD, USA, 02/2010 222 Disk Drive, Rapid 57701 2880 North Plaza Drive, Rapid City,City, SouthSD Dakota 57702 (800) 843-8848 www.symcom.
BE SURE POWER IS DISCONNECTED PRIOR TO INSTALLATION! FOLLOW NATIONAL, STATE AND LOCAL CODES. READ THESE INSTRUCTIONS ENTIRELY BEFORE INSTALLATION. ® SymCom’s MotorSaver Model 201A-AU is an auto ranging plug-in voltage / phase monitor designed to protect 3-phase motors regardless of size. It is used on 190-480VAC (475-600 for Model 201-575-AU), 50/60 Hz motors to prevent damage caused by single-phasing, low voltage, high voltage, phase reversal, or voltage unbalance conditions. CONNECTIONS 1.
Figure 1: Typical Wiring Diagram for Control and Alarm Figure 2: Pin-Out Diagram © 2010 SymCom, Inc.
SETTINGS Rotate the knobs to the appropriate setting for the application following the guidelines below. Do not apply excessive force when adjusting settings. Line Voltage Rotate the VOLT ADJ. (VAC) knob to the nominal 3-phase line voltage feeding the motor to be protected. Restart Delay Rotate the RESTART (SEC) knob to the desired position. The restart delay is the time between the MotorSaver® measuring acceptable voltage and closing its output contacts.
Calculating Voltage Unbalance NEMA MG1 Unbalance Formula % Voltage Unbalance = Maximum Deviation from the Average x 100% Average Example: The measured line-to-line voltages are 203, 210, and 212. Average = 203 + 210 + 212 = 208.3 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. % voltage unbalance = 5.3 x 100 = 2.
OPERATION ® After applying power to the MotorSaver , the green RUN light will blink during the restart delay. After ® the restart delay time has expired, the MotorSaver will energize its output contacts (open the normally closed and close the normally open contacts) and the RUN light will turn solid green. Automatic Reset Mode Set the RESTART (SEC) knob to the desired restart delay time. Apply 3-phase power to the motor. The MotorSaver’s green RUN light will blink during the restart delay.
TROUBLESHOOTING SYMPTOM No lights are on the unit seems completely dead Red light is blinking (on initial power-up) Red light is blinking (after the motor has been running) Red light is blinking in this pattern Red light is blinking in this pattern Red light is on steady LIGHT PATTERN SOLUTION N/A Verify L1, L2 & L3 are connected to terminals 3, 4 & 5. Measure the three line-to-line voltages.
DIMENSIONS 1.75 (44.55) 2.375 (60.331) BOT TOM 3.15 (80.01) .5 (12.7) SIDE NOTE: Use of the OT08-PC or RB08-PC octal socket, manufactured by Custom Connector Corp., is required for the MotorSaver to qualify as a UL Listed device. The OT08-PC is 35mm DIN rail compatible. © 2010 SymCom, Inc.
MOTORSAVER® 201A-AU SPECIFICATIONS Functional Characteristics Low Voltage Trip Reset High Voltage Trip Reset Voltage Unbalance Trip Reset Trip Delay High/Low Voltage and Unbalance Single-Phasing Restart Delay 90% of setting 93% of setting 110% of setting 107% of setting 2-8% Trip setting - 1% (5-8%) Trip setting - 0.
NOTES © 2010 SymCom, Inc.
NOTES © 2010 SymCom, Inc.
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