Answer / balakrishnan

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:

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.

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