how we can select MCB ratings according to Voltages, Curves.

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how we can select MCB ratings according to Voltages, Curves...

1.We can select the MCB's acoording to Voltage is simple,if
we want 230V,select single pole MCb's else want 415V select
3 pole MCB's.

2.We can select the MCB's according to to Curves is also
simple,there are several types of curvature available..
there are,
B type: react quickly overload i.e 3-4.5 times of full load
current
Type C: react more slowly,these are recommended for
inductive with high inrush currents like fluorescent lamp.5-
10 times of Ifl
Type D: 10-20times of Ifl,recommended for very high inrush
current.
Type K: 8-12 times of full load I,recommended for cable
protection to be provided which include
motors,capacitors,and transformers
Type S: 13-17 times of Ifl,recommended for protection of
control Transformer,

Type Z:

Is This Answer Correct ?

31 Yes

2 No

how we can select MCB ratings according to Voltages, Curves...

Answer / kundan kumar

MCB rating depends on voltage as well as load, so first of
all we will have an idea about load which will connected to
MCB.

Is This Answer Correct ?

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2 No

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