102A2 - 102A Series

Series: 102A Questions? Contact Littelfuse Support
Littelfuse Voltage Monitoring Relays
The 102A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-600VAC, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor automatically selects between the 200V and 400V range.

A unique microcontroller-based voltage and phase-sensing circuit constantly monitors the 3-phase voltages to detect harmful power line conditions. 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 acceptable levels. The Model 102A includes advanced single LED diagnostics. Five different light patterns distinguish between faults and normal conditions.

Property (Mouseover for details) Value
Input Voltage (V) 190 to 480VAC
Maximum Input Power 5W
Input AC Line Frequency (Hz) 50/60Hz (50Hz will increase all delay timers by 20%.)
Output Form SPDT - 1 Form C
Output Load Rating (VA) Pilot Duty: 480VA @ 240VAC; General Purpose: 10A @ 240VAC
Restart Delay Range Manual 2 - 300s adjustable
Trip Delay Range Low/High Voltage: 4 seconds; Unbalance and Phasing Faults: 2 seconds
Trip Point Accuracy (%) ±1%
Undervoltage Trip Voltage 90%
Undervoltage Reset Voltage (%) 93%
Voltage Unbalance Trip Point (%) 6%
Voltage Unbalance Reset (%) 4.50%
Termination Type Torque: 7in-lbs; Wire Size: 12-18AWG
Mounting Method #8 screws
Operating Temperature -40° to 70°C (-40° to 158°F)
Storage Temperature (F/C) -40° to 80°C (-40° to 176°F)
Dimensions 2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)
Weight (lbs/g) 1.05 lbs. (16.8 oz. 476.3 g)