460-SP Series – Single-Phase Voltage Monitor Series - Littelfuse 460-SP Voltage Monitoring Relays Provide Superior Protection

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The 460-SP (460-xxx-SP) series is a single-phase voltage monitor designed to protect motors from damaging power conditions. The 460-100-SP is used on 95–120 V ac, 50*/60 Hz single-phase motors, and the 460-200-SP is used on 190–240 V ac, 50*/60 Hz single-phase motors to protect them from damaging high- and low-voltage conditions. An adjustment knob allows the user to set a 1–500 second restart delay. The variable restart delay is also a power-up delay and can be utilized to stagger-start motors on the same system.

The unique microcontroller-based, voltage-sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the MotorSaver’s output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level and a specified amount of time has elapsed (restart delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

*Note: 50 Hz will increase all delay timers by 20 %

Features

  • Proprietary microcontroller-based circuitry
  • Fixed trip delay 4 seconds
  • Adjustable restart delay (1–500 s)
  • Advanced LED indication
  • DIN-rail or surface-mountable

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Termination TypeMounting MethodDimensionsWeight (lbs/g)HumidityInput AC Line Frequency (Hz)Maximum Input PowerOutput Load Rating (VA)Overvoltage Reset Voltage (%)Overvoltage Trip Voltage (%)Protection ClassRestart Delay RangeStorage Temperature (F/C)StockSamplesCompare
460-100-SP95 - 120 Vac1 Form CTorque: 6 in-lbs; Wire: Stranded or solid 12 - 20 AWG one per terminal35mm DIN rail or Surface Mount (#6 or #8 screws)3.5 H x 2.08 W x 2.35 D in. (88.9 x 52.9 x 59.7 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)6Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac107%110%IP20; NEMA 1 (finger safe)1 - 500 s adjustable-40° to 80°C (-40° to 176°F)CheckOrder
460-200-SP190 - 240 Vac1 Form CTorque: 6 in-lbs; Wire: Stranded or solid 12 - 20 AWG one per terminal35mm DIN rail or Surface Mount (#6 or #8 screws)3.5 H x 2.08 W x 2.35 D in. (88.9 x 52.9 x 59.7 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)6Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac107%110%IP20; NEMA 1 (finger safe)1 - 500 s adjustable-40° to 80°C (-40° to 176°F)CheckOrder
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