EWRB theory prep – MCBs EXAM well updated 2024 with questions and correct answers
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EWRB theory prep – MCBs well updated 2024 wit
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EWRB Theory Prep – MCBs Well Updated 2024 Wit
EWRB theory prep – MCBs EXAM well updated 2024 with questions and correct answers
circuit breaker purpose - CORRECT ANSWERdetect SC/OL and break contact on fault detection
at short circuit, PSCC fault occurs, what operating mechanism is used - CORRECT ANSWERmagnetic field
two opera...
standard domestic supply voltage - CORRECT ANSWER230V
maximum MCBs under 1 RCD? - CORRECT ANSWER3x CB / RCD unit
types of MCB trips - CORRECT ANSWERthermal
magnetic
thermal tripping - CORRECT ANSWERbi-metal strip, used for overload currents
protection
magnetic tripping - CORRECT ANSWERmagnetic inductor, used for short circuit
protection
reset procedure - CORRECT ANSWERreset to OFF
reset to ON
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