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Anonymous Poster #1

3 Phase Induction Motor Cable Rating and Overload Rating

03/14/2011 11:36 AM

Could you please provide me with the above details in tabulated form for a range of motors or for a 15kw 380V ac motor?
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pnaban
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#1

Re: 3 Phase Induction Motor Cable Rating and Overload Rating

03/14/2011 12:04 PM

15kW 380V induction motor will take approximately 30Amp. Refer tables or cataloque for accurate result. If wye delta starter is used OL setting can be 30 divided by 1.732. For cable size you should give ambient temperature,type of cable(armoured/ unarmoured/ clipped to surface/enclosed in conduit/buried/single or grouped etc)

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Anonymous Poster #1
#2
In reply to #1

Re: 3 Phase Induction Motor Cable Rating and Overload Rating

03/15/2011 2:32 AM

15kW 380V induction motor will take approximately 30Amp. Refer tables or cataloque for accurate result. If wye delta starter is used OL setting can be 30 divided by 1.732. For cable size you should give ambient temperature,type of cable(armoured/ unarmoured/ clipped to surface/enclosed in conduit/buried/single or grouped etc)

It's direct on line starter, the cable should be armoured running on a cable tray grouped, ambient tempaerature about 20 degrees celcius, so what would the cable size and overload setting be?Or if there is a standard reference table may you please forward it to me
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pnaban
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#3
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Re: 3 Phase Induction Motor Cable Rating and Overload Rating

03/15/2011 6:49 AM

If you are in a Commonwealth country refer BS 7671(IEE wiring regulations). Otherwise refer NEC or equivalent relevant to your country

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