Electrodepot
 

 
Three-Phase Voltage Monitor is an autoranging plug-in voltage monitor designed to protect three-phase motors regardless of size. It is used on 190-480 VAC 50/60 Hz motors to prevent damage caused by single phasing, low voltage, phase reversal, or voltage unbalance. To detect harmful power line conditions, the unique microprocessor-based voltage and phase sensing circuit constantly monitors the three-phase voltages. When a harmful condition is detected, the Model 201A MotorSaver's output relay is deactivated after a fixed trip-delay time period. The output relay reactivates after power line conditions return to an acceptable level for a fixed restart delay time. The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.
Motors protection
against single phasing, 
low voltage, 
phase reversal,
voltage unbalance
Octal DIN socket
UL and ULC listed
Bicolor LED indication 



SPECIFICATIONS
  Line voltage Three-phase, 190-480 VAC, adjustable
  Frequency 50* or 60 Hz
  Low voltage
    Trip 90% of set point
    Reset 93% of set point
  Voltage unbalance (NEMA)
    Trip 6%
    Reset 4.5%
  Trip delay time
    Low voltage 4 sec
    Unbalance & phasing faults 2 sec
  Restart delay time
    After a fault 2 sec
    After a complete power loss 2 sec
  Output contact rating SPDT, pilot duty 480 VA @ 240 VAC; general purpose 10A @ 240 VAC
  Transient protection 2500V for 10 ms
  Power consumption 5 watts max
  Weight 9 oz (0.25 kg)
  Approvals UL and ULC listed; CE certified
  * 50 Hz will increase all delay times by 20%

 
 
   930810 3 phase auto voltage monitor $299.99