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3 Cards in this Set
- Front
- Back
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MCB (miniature circuit breakers) |
Protect the final circuits in a dist. system. Usually 63A. During s.c. High current causes magnets in the mcb to generate magnetic field which trips latch and breaks circuit. |
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RCD (residual current devices) |
Protects against earth faults. Detects difference in current flow between live and neutral. Magnets monitor this disparity and trigger latch to switch, due to magnetic fields. |
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MCCBs (mounded case circuit breakers) |
When a fault occurs it's detected by the trip unit. Air forces open the contacts within the device. |
