50R400 - 50R Voltage Relays Series

Littelfuse Voltage Monitoring Relays
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The 50R single-phase voltage monitor has a voltage-sensing circuit which constantly monitors the single-phase power for a low voltage condition. Single-phase motors on fans, compressors, air conditioners, heat pumps, well pumps, sump pumps and small conveyor motors are all applicable to the Model 50R.

When a harmful condition is detected, the 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) 380 - 480 Vac
Maximum Input Power 5
Input AC Line Frequency (Hz) 50 / 60 (50 will increase all delay timers by 20%)
Output Form SPDT - 1 Form C
Output Load Rating (VA) Pilot Duty: 470 VA @ 600 Vac; General Purpose: 10 A @ 240 Vac
Restart Delay Range Undervoltage: 2 s; Complete Power Loss: 2 s
Trip Delay Range 4 s
Undervoltage Trip Voltage 90%
Undervoltage Reset Voltage (%) 93%
Termination Type Torque: 7 in-lbs; Wire Size: 12 - 18 AWG
Mounting Method #8 screws
Operating Temperature -20° to 70°C (-4° 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 2.93 H x 5.27 W x 2.95 D in. (74.4 x 133.9 x 74.9 mm)
Weight (lbs/g) 0 Kg
Check Stock Yes
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