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Alstom VAX 31 Trip Circuit and Trip Coil Supervision Relay for Industrial ; Power, 1250 - 7500 W ; Features: Simple and robust construction; Positive action Type VAX 21 and MVAXM 21 relays monitor the trip circuit only when the circuit breaker is closed (post-closing supervision only) while type VAX 31 and MVAXM Publication R7012 is a Parts Catalogue and Assembly Instructions. This document will be useful when individual relays are to be assembled as a composite rack or. Alstom Trip Circuit Supervision Relay VAX31ZG0750BA,RELAY-VAX31ZG0750BA, Product Description; Wiring diagram; Technical Manual TyPE VAX 31. INTRODUCTION This manual covers the commissioning and maintenance instructions for Trip Circuit Supervision Relay Types VAX&MVAXM Type VAX/MVAXM relays areType VAX 21 and MVAXM 21 relays monitor the trip circuit only when the circuit breaker is closed (post-closing supervision only) while type VAX 31 and MVAXM MVAX relays supervise the trip circuit of a circuit breaker, initiating audible alarms and visual indications if the trip circuit fails or the mechanism does Type VAX relays are of simple and robust construction. They are arranged to initiate an audible type VAX 31 relay monitors the trip circuit continuously. Trip Circuit & Trip Coil Supervision VAX31 - Free download as PDF File (.pdf) or asst Trip circuit and Trip Coil supervision Relay ATOR CALVO 'TRIP IR