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.

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

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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.

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

 

Key benefits :

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• 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

 

MMLG Models :

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• MMLG 01 Standard test block

• MMLG 02 Test block designed for busbar protection schemes

• MMLG 04 Horizontal version of MMLG 02

• MMLG 07 Vertical version w/o dc isolation