Things You Should Know About MCCB Circuit Breakers
MCCB circuit breaker, as the name suggests, is an
electrical protection device which is used to prevent outages and dangerous
current flows in case of short circuit. These circuit breakers can hold up to
2500 amps of current and are available in multiple trip settings. This is how
the circuit breakers contribute to the safety of the premise:
1.
They protect all the appliance and electrical connections from getting
exposed to high current flow in case of fault in line.
2.
If the current in any device stays for longer than normal, or if the
current exceeds the standardized value, these breakers prevent the overload
from causing large damage.
3.
The MCCB panel board can be switched on or off easily to keep the
operations on or for enabling seamless testing during replacement or
maintenance schedules.
Important areas of
application of circuit breakers
As it is evident that
the residual circuit breaker is capable of handling heavy current flows, these
find their best use in applications where high current flows take place. Some
of the important functions of these circuit breakers are:
·
They are used in welding machines: The welding machines need high
current flow which is certainly not possible to handle with the help of mini
circuit breakers. Thus, these heavy duty circuit breakers are employed while
using welding machines.
·
Electric feeders: The electric feeders are the carriers of large amount
of current as these are distributing current as a part of their functioning.
Sometimes, these need additional circuits with different trip settings. Circuit
breakers handle the large current and provide trip settings to meet the
functional requirements of electric feeders.
·
Motors and generators: Motors are connected with circuit breakers in
order to protect them from current overload and to avoid tripping. Similarly,
gen-sets are required to handle the large current produced as an output by the
generator. A simple MCCB can do the job of handling current ratings and
managing the current flow.
·
Capacitor banks: These are protection modules for correcting power
factor in industrial settings. If they come across current overload, the MCCB
covers them against it sufficiently.
How to ensure circuit
breakers are safe
A number of miniature
circuit breakers are tested before deployment to ensure
that the correct product reaches the end user and does not ditch them in case
of power overload. One of the tests is insulation resistance test. In this
test, the MCCB is disconnected to find the insulation level across phases, load
and supply terminals. If the insulation is less that the recommended value,
then the MCCB will not be able to provide ample protection.
Another test is
tripping test where the fault or overload is simulated to find the response of
the MCCB board. This test is carried out in two phases – thermal protection and
magnetic protection. In the former, over-current thrice the allowed value is
made to pass through, while in the latter, pulses of high current are sent to
check the performance.
Moulded case circuit breakers are the ideal choice for protection of electrical connections. These are easy to maintain and simple processes of lubrication and cleaning can help elongate the functional life of these circuit breakers.
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