Question
Download Solution PDFIf the operating current is between 10 A to 100 A, which device will be used for breaking the circuit safely?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Miniature circuit breaker (MCB):
A miniature circuit breaker is a compact mechanical device for making and breaking a circuit both in normal condition and in abnormal conditions such as those of over current and short circuit.
It is used for household wiring and in small units as a safety measure. All residential premises can have incoming protection after energy meter instead of fixing fuse and main switch.
These are available at the rating of few amps to 50 amps.
Moulded case circuit breakers (MCCB) are similar to thermomagnetic type MCBs except that these are available in higher ratings of 100 to 800 amp at 500 V 3-phase.
Application:
If the operating current is between 10 A to 100 A, for breaking the circuit at currents higher than operating current i.e. currents more than 100 A, the device should available at ratings more than 100 A. So, MCCB is suitable for this purpose.Last updated on Jun 11, 2025
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