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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 31 Electron Power Service - Offering Alstom VAX31ZG0750BA Trip Circuit Supervision Relay, ट्रिपिंग रिले at Rs 6255 in Vadodara, Gujarat. 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. MVAX. 12/21/31/91. Trip Circuit Supervision Relays. MVAX relays supervise the trip circuit of a circuit breaker, initiating audible alarms and. AUTOMATION M V AX 1 2 , 2 1 , 3 1 , 9 1 Trip Circuit Supervision Relay Technical Manual R8010Q GRID Note: The technical manual for this device givesAlstom Trip Circuit Supervision Relay VAX31ZG0750BA. Technical Specification of Alstom Trip Relay VAX31ZG0750BA. Type: Electro Mechanical Relay; Protection Type Features: · Application: Post-closing or continuous supervision of the trip circuit of cir-cuit breakers · General Description: Type VAX and MVAXM relays are of