This document discusses different types of electrical safety devices used to protect circuits. Fuses operate to provide overcurrent protection by interrupting current flow. Circuit breakers are automatically operated switches that protect circuits from damage caused by overcurrent or short circuits by interrupting current after a fault is detected. Molded case circuit breakers (MCCBs) can withstand higher amperage than miniature circuit breakers and are used for more energy-intensive systems, with adjustable trip settings. Residual current circuit breakers (RCCBs) are particularly useful for protecting against sudden earth faults, tripping the circuit in a fraction of a second to prevent electrical shocks.
3. In electronics and electrical
engineering, a fuse is an electrical
safety device that operates to provide
overcurrent protection of an electrical
circuit
4. A circuit breaker is an automatically
operated electrical switch designed to
protect an electrical circuit from damage
caused by overcurrent, typically resulting
from an overload or short circuit. Its basic
function is to interrupt current flow after a
fault is detected.
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10. A bit heavier-duty than MCBs, molded
case circuit breakers (MCCBs) can withstand
amperage levels of up to 2,500 amperes. It’s also
used for overload and fault protection, though
normally for more energy-intensive systems.
What’s more, it’s trip settings are also typically
adjustable, giving you far greater flexibility in how
you use it.
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12. RCCB is particularly useful in situations
where there is a sudden earth fault occurring
in the circuit. e.g. A person accidentally
comes in contact with an open live wire in
the circuit. In such situation, in absence of an
RCCB in the circuit, an earth fault may occur
and the person is at the risk of receiving an
electrical shock. However, if the same circuit
is protected with RCCB, it will trip the circuit
in fraction of a second thus preventing the
person from receiving an electrical shock.
Therefore, it is a good and safe practice to
install RCCB in your electrical circuit.
