Description

Low Burden Tripping Relay Types MVAJ 11. 13. 14

These relays are suitable for applications where immunity to

capacitance discharge and high minimum operation currents are

not required.

Control Relay Type MVAJ 34

This is a dual-rated electrical-reset relay, the main function of

which is to switch protection and autoreclosing equipment in and

out of service from a remote point via pilot wires. It complies with

NGC SPEC. NGTS2.19:1996.

High Burden Tripping Relay Types MVAJ 21. 23. 25. 26. 27

Versions have one or two contact stacks depending on the number

of output contacts required.

Type MVAJ 21 High Burden Self-resetting Relay

This uses a contact on the main contact stack to energize a

separate, rear-mounted economizing element. After operation,

this reduces the burden by switching in resistance in series with

the main element and switching out shunt resistance.

Figure 2 shows a typical circuit diagram for self-resetting relays of

this type with high speed economy. When the main attracted

armature unit RL1 is energized by the protection contact PR, a

contact RL1-a energizes auxiliary element RL2. When contacts

RL2-a and RL2-b open, resistor R4 is put in series with RL1 while

the circuit to resistor R2 is broken.