Features & Benefits

Application Notes

Protection Provided
Competitive Advantages

 

Overview

Three Phase Voltage Monitor Application Notes


Restart Alarm Buzzer/Flasher:
The alarm sounds when the operator pushes the start switch. The alarm bell and warning lamp indicate a pending restart. The start switch must be maintained until the TRU1’s delay-on-make time delay is completed, and its internal contacts transfer. Then the alarm is extinguished and the motor contactor coil (MCC) is energized. Pressing the stop switch resets the system without sounding an alarm.

Delayed Restart:
When line conditions return to normal, the relay contacts in the PLM line monitor close (automatic reset). The TRU’S restart time delay begins. During the time delay the alarm sounds, warning operators of pending restart. At the end of the delay, the contacts in the TRU transfer, starting the motor and extinguishing the warning alarm.


Note: All local electrical codes and safety proceedures should be followed to protect operators during automatic restarting of motors.

Copyright 2001 SSAC Inc    Revised 07/29/02