Saturday, April 20, 2013

Cara Mencari FLA [Hubungan antara HP dan kW] dan Cara Memilih Kabel yang Sesuai

For smooth working of motor which is connected to the mcc panel, cable size selection has an important role. We have to consider lot of things for selecting a proper cable, like motor rating (Kilowatt,Horse power),Voltage(230v, 415 v etc.),Phase(Single, 3 phase),Temperature, Distance between motor and mcc.

Before that i will expalin how to find out the cable current rating.
1.Incoming suppy cable rating.
           Motor Full load current * 1.2
2.Inside cables – Motor circuit cable rating.
           Motor full load current * 0.7

Now you will be having a doubt how to find out the full load current of a motor?

Formula for finding full load current of a motor.

3 phase:
            Full load current=(746*hp)/(1.732*V*pf*eff) or KW/(1.732*v*pf*eff)
                                 hp=horse power
                                  v =Voltage
                                  pf=Power factor
                                 ef=efficiency
                              1 hp=745.7 W=0.746 kw

Single phase motor Full load current table [Horse power,Kilo watt]
Three phase motot Full load current table [Horse power,Kilo watt]
Cable size selection chart-Single phase
Cable size selection chart- Three phase




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