MK Sentry RCDs

MK Sentry RCDs

The MK Sentry range of RCDs offers a comprehensive selection of devices designed to meet most residential,commercial and light industrial requirements. The range includes two and four pole, a.c., d.c. fault current sensitive and time delayed models and a selection of current ratings from 16 to 100A is available in a variety of tripping sensitivities.

When in the OFF position a contact gap of 4mm is present, enabling Sentry RCDs to be used as isolating switches where appropriate. Positive indication of the opening of the contacts is only given when contact status indicator shows green. The operating dolly may be locked in either the ON or OFF position without affecting the ability of the trip mechanism to operate, i.e.the RCD is ‘trip-free’. It is not possible to hold the contacts closed when a fault condition exists.

All Sentry RCDs incorporate a filtering device to provide protection against transient surges in the supply to the unit, thus reducing the occurrence of unwanted tripping.


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