Trip Circuit Supervision Relays Block MVAX12

Application Flexibility:-

1. Trip circuit can be supervised with breaker open or closed

2. Ensures the integrity of the protection scheme

Reliable and Easy to Use:-

1. No mis-tripping of breaker by accidental short-circuits

2. No false alarms given due to protection operation

3. Design pedigree from >1 million auxiliary relays supplied

4. Simple and robust design

This Trip Circuit Supervision Relays Block is easily insert in your schematic diagram and connect as you like way.

The MVAX12 is a single unit which is connected across the trip circuit supply. The unit is normally energised and drops off if the trip voltage is lost or falls below approximately 40% of nominal. The unit picks up below 80% of rated voltage. To avoid operation due to voltage dips caused by faults in other circuits, a time delay circuit is
incorporated to give 100 ms delayed drop off.