Square D GVAU415 Manual Starter Under-Voltage Trip, 12 VA, 415 V, 50 Hz

Detailed Description: Square D by Schneider Electric under voltage trip accessory trips the circuit breaker when the voltage drops to a value between 35 pct. and 70 pct. of the control voltage. If the under voltage trip is not energized, it is impossible to close the circuit breaker, either manually or electrically. An attempt to close the circuit breaker produces no movement of the main contacts.

Warranty: https://s3.amazonaws.com/cesco-content/unilog/Batch7/785901/100036-WarrantyURL.pdf