$314.65 per piece


Brand / Manufacturer: LITTELFUSE SYMCOM

Voltage: 480

Department: 24

Catalog Number: 250A

Catalog / Class: Voltage Monitor Relay

SKU: 250A

Categories: , ,

*Prices Subject to Change



The 250A is a 3-phase, auto-ranging, dual-range voltage monitor

that protects 190–480 V ac, 50/60 Hz motors regardless of size

from low and high voltage, unbalance/single-phase, and reverse-

phase. The product provides a user select able nominal voltage

set point and the voltage monitor automatically selects between

the 200 V and 400 V range. The 250A also features adjustable or

manual restart delay.

This unique microcontroller-based voltage and phase-sensing

device 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 250A includes advanced

single LED diagnostics. Five different light patterns distinguish

between faults and normal conditions.