MMLB / MMLG Test blocks and test plugs

MMLB / MMLG Test blocks and test plugs

Test blocks and test plugs

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TEST BLOCK, TEST PLUG

Designed as part of the Midos range, these test blocks offer facilities for monitoring and secondary injection testing of any power system protection scheme when used with the multi-fingered test plug type MMLB 01.

The MMLG test block carries 14 circuits, each of which is brought out to separate pairs of terminals at the rear of the case.

Each circuit comprises a pair of internal contacts which are normally sprung together to complete the circuit link through the block when the associated protective equipment is in normal service.

Insertion of the test plug type MMLB 01 open circuits the contacts which connect terminal pairs, allowing testing to proceed.

Key benefits:

Test block can be mounted adjacent to Midos modular relays and systems

Test block removes the need to disturb protective system wiring for testing

Monitoring, isolation and secondary injection testing are simplified and quickly performed