Power Monitoring and Protection

460 Series

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Product Bar End

460 Series

MotorSaver™ Three-Phase Voltage Monitor 460 Series

MotorSaver™ Three-Phase Voltage Monitor


The MotorSaver™ Model 460 three phase voltage monitor is a microcontroller-based voltage and phase sensing circuit that constantly monitors three phase voltage to detect harmful power line conditions. When a harmful condition is detected, the output relay in the 3 phase monitor is deactivated after an adjustable trip delay time. The output relay reactivates after power line conditions return to an acceptable level for an adjustable restart delay time. If equipped with the manual reset option, an external normally open momentary reset switch must be closed to reactivate the output relay. The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions. When integrated into a building automation system, BAS, the power monitor automatically senses whether it is connected to a 190-240 volt 60 Hz system, a 440-480 volt 60 Hz system, or a 380-416 volt 50 Hz system. An adjustment is provided to set the nominal line voltage from 190-240 or 380-480 volt AC. Other adjustments include a 1-30 second trip delay, a 1-500 second restart delay, and a 2% to 8% voltage-unbalance trip point adjustment.


(Wholesale customers, log in for your special pricing)

QtyModelDescriptionIn StockList PriceInternet Price
460 3 PHASE VOLTAGE MONITOR, 190-480V SPDTIn Stock218.00122.08
460-575 3 PHASE VOLTAGE MONITOR, 470-600VAC SPDTIn Stock234.00131.04


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  • Protection of three-phase motors from loss of any phase, low-voltage, phase reversal, voltage unbalance, and high voltage
  • Adjustable restart delay
  • Adjustable trip delay
  • Adjustable voltage unbalance trip point
  • Optional manual reset
  • Diagnostic LEDs for indication of trip status
  • Single-phase condition detection regardless of regenerated voltages
  • Surface or DIN rail mounting

Supply Voltage :190-480 VAC

Supply Watts:6W maximum

Frequency:50*/60 Hz

 :* 50 Hz will increase all delay times by 20%.

Humidity:10-95% RH, non-condensing

Relay Rating:SPDT, pilot duty 480 VA @ 240 VAC General-purpose 10A @ 240 VAC

Transient Protection:IEC 1000-4-5, ANSI/IEEE C62.41, UL508

Low Voltage Trip:90% of setpoint (±1%)

Low Voltage Reset:93% of setpoint (±1%)

Reset Delay Time after Fault:1-500 second adjustable

Reset Delay Time after Power Loss:1-500 second adjustable

Trip Delay Time High Voltage:1-30 second adjustable

Trip Delay Time Low Voltage:1-30 second adjustable

Trip Delay Time Phase Fault:1 second fixed

Trip Delay Time Unbalance:1-30 second adjustable

Voltage Unbalance Reset:Trip setting minus 1% (5-8%) Trip setting minus 0.5% (2-4%)

Voltage Unbalance Trip:2% to 8%, adjustable

Operating Temperature:-4° to 158°F (-20° to 70°C)


Dimensions:3.5"H x 2.1"W x 2.4"D (8.9 x 5.3 x 6.1 cm)

Weight:0.9 lb (0.4 Kg)

Approvals:UL File #E68520, CE

Warranty:5 years


Download Additional Data

document   Catalog Page
document   460 Instructions
document   460-MR Instructions