Answer / prdp

simply calculate the line current which 2hp motor will take
by considering the power factor.Again give some margin for
the overloading of motor.
for 3 phase motor,line rated current
= 2*746/(1.73*linevoltage*pf)

Answer / shri..

v = 415
hp = 2
PF 0.7
W = 1492

A = (1492)/(415*1.732*0.7)

A = 1044.4 /503.14

A = 2.96 Amps / Phase

Take a MCB c curve type

Answer / marlo

motor rated current on the nameplate multiplied by 300%.This will allow the MCB not to trip during starting.However each MCB has its own characteristic depending on its application.see MCB code for it purpose of application.MCB has a code for quick release and time delay trip.

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