GE MVAJM High Speed Tripping and Control Relays

Models available

Type MVAJM relays may broadly be divided into three groups:

! High burden tripping relays

! Low burden tripping relays

! Control relays

Application

High burden tripping relays: Types MVAJM 15. 25. 41. 45

These relays are suitable for use in high security circuit breaker tripping circuits. In

particular they can be used in distributed tripping or control relay contact logic

schemes where the initiating contact may be remote from the relay.The high burden

provides immunity to capacitance discharge currents, which can result at the inception

of an earth fault on battery wiring and immunity to the subsequent leakage current.

The high burden relays are recommended for use with series connected operation

indicators, supervision relays and series seal-in units on protective relays.

Low burden tripping relays: Types MVAJM 11. 13

These relays are suitable for applications where immunity to capacitance discharge and

high minimum operation current are not required. These relays are generally used

when a number of simultaneous operations are to be initiated by a single protective

relay having insufficient contacts of its own and where series connected operation

indicators are not used.

Control relay: Type MVAJM 14

This is an electrically reset control relay. The relay is meant for switching the secondary

circuits of current transformer in busbar protection. Also wherever “latch-in” type of

control relay is required for contact multiplication control schemes, relay type MVAJM

14 can be employed.

Features

! High speed operation

! High degree of mechanical stability

! Positive action without chatter

! Proof against high capacitance discharge currents

Customer Benefits

! Directly operates circuit breaker trip coils

! High reliability

! High speed operation

! Immunity to wiring capacitance discharge