460-100-SP - 460-XXX-SP Series

Littelfuse Voltage Monitoring Relays
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The 460-100-SP is used on 95-120VAC, 50*/60Hz single-phase motors and the 190-240VAC, 50*/60Hz 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.

A unique microcontroller-based, voltage-sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the relay’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.

Property (Mouseover for details) Value
Input Voltage (V) 95 to 120VAC
Maximum Input Power 6W
Input AC Line Frequency (Hz) 50/60Hz (50Hz will increase all delay timers by 20%.)
Output Form 1 Form C
Output Load Rating (VA) Pilot Duty: 480VA @ 240VAC B300; General Purpose: 10A @ 240VAC
Restart Delay Range 1 - 500s adjustable
Trip Delay Range Under/Over Voltage: 4s
Trip Point Accuracy (%) ±1%
Overvoltage Trip Voltage (%) 110%
Overvoltage Reset Voltage (%) 107%
Undervoltage Trip Voltage 90%
Undervoltage Reset Voltage (%) 93%
Protection Class IP20 NEMA 1 (finger safe)
Termination Type Torque: 6in-lbs; Wire: Stranded or solid 12-20AWG one per terminal
Mounting Method 35mm DIN rail or Surface Mount (#6 or #8 screws)
Operating Temperature -40° to 70°C (-40° to 158°F)
Storage Temperature (F/C) -40° to 80°C (-40° to 176°F)
Humidity 10-95% non condensing per IEC 68-2-3
Dimensions 3.50 in H x 2.08 in W x 2.35 in D (88.9 x 52.9 x 59.7 mm)
Weight (lbs/g) 0.9 lb. (14.4 oz. 408.2 g)