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MVAJ13D1GB0780A Tripping and Control Relays  

Protective relays are precise measuring devices, the contacts of which should not be expected to switch large electrical loads.
In some cases, the protective relay can trip a circuit- breaker directly, or according to the coil rating and the number of circuits to be energised.
The MVAJ relay interfaces with the protection to provide: higher contact capacity, additional contacts for tripping multiple circuit-breakers, control functions, signalling and interlocking.
The MVAJ range comprises very reliable hinged armature relays designed to directly operate circuit-breaker trip coils. Built to very high specifications, the MVAJ range provides a highly flexible and reliable link between the protective relays and the circuit-breakers.
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Overview

Essential details：MVAJ13D1GB0780A Tripping and Control Relays  

Protective relays are precise measuring devices, the contacts of which should not be expected to switch large electrical loads.
In some cases, the protective relay can trip a circuit- breaker directly, or according to the coil rating and the number of circuits to be energised.
The MVAJ relay interfaces with the protection to provide: higher contact capacity, additional contacts for tripping multiple circuit-breakers, control functions, signalling and interlocking.
The MVAJ range comprises very reliable hinged armature relays designed to directly operate circuit-breaker trip coils. Built to very high specifications, the MVAJ range provides a highly flexible and reliable link between the protective relays and the circuit-breakers.
Models Available
 Trip relays
Trip relays possess a standard hand-reset flag and operate within 10 ms.
Table 1 shows the trip relay versions available
 Control relays
Control relay variants of each trip relay are available. These relays operate within
approximately 15 ms
 All relays configured for high burden applications are suitable for DC operation only

MVAJ13D1GB0780A

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MVAJ13D1GB0780A Tripping and Control Relays

Self-reset relays reset when the initiating signal is removed, making them suitable for use as trip relays in auto-reclose schemes and also for general flagging purposes. Hand-reset relays require manual resetting, making them effective lockout relays which are commonly used to trip circuit-breakers associated with transformers. Electrical-reset relays require a voltage to be applied to the unit to reset the contacts. These relays may be used in auto-reclose schemes, or where remote resetting of the relay is required.
Trip Relay
With the exception of the MVAJ 102 time delayed self-reset relays, all trip relays are suitable for either low burden or high burden applications.
High Burden Application
These relays, supplied as high burden, are suitable for use in high security circuit-breaker tripping circuits. The high burden provides greater immunity to capacitance discharge currents, which can result at the inception of an earth fault on battery wiring. This makes the relays particularly suitable for use in distributed tripping or control relay contact logic schemes, where the initiating contact may be remote from the relay.

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