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kc.cr4
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Join Date: Jan 2012
Location: Ahmedabad
Posts: 4

HT Motors

01/12/2012 8:04 AM

what are the factors that affects HT motor starting current ?

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lyn
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Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: HT Motors

01/12/2012 8:14 AM

You go first. Surely you can name at least one if you think really hard?
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king.faisal
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Join Date: Jan 2012
Posts: 25
#2

Re: HT Motors

01/12/2012 11:26 AM

usually loose connection, moisture in h.t motor winding and weak meggering result of h.t cable in which i.e earth to phase and phase to phase meggering result
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JRaef
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United States - Member - New Member Engineering Fields - Power Engineering - New Member

Join Date: Sep 2006
Location: California, USA, where the Godless live next door to God.
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Good Answers: 804
#3

Re: HT Motors

01/12/2012 7:15 PM

Oooh, Oooh! I got one...

"Voltage".

Do I win?

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zaheer khan
Member

Join Date: Jan 2012
Posts: 6
#4

Re: HT Motors

01/12/2012 9:13 PM

There are many factors that affect the starting current of 3P,IM few among those are:

i)Starting method Direct on Line or Star/Delta

For a Star Connected motor starting current is higher.

ii)Nature of load i.e pump,compressor, fan etc

For fan and compressor loads the starting current will be higher.
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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
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#5
In reply to #4

Re: HT Motors

01/14/2012 12:06 AM

Oh! Please come again! "For a satr connected motor, starting current will be higher". That is quite contradictory to what I have been believing & practising for all of 30 years now.
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TonyS
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#9
In reply to #5

Re: HT Motors

01/14/2012 12:51 AM

For goodness sake EE calm down. You'll be having a corona if you carry on like that!

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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#6
In reply to #4

Re: HT Motors

01/14/2012 12:19 AM

Are you suggesting star-delta starter for a HT Motor? Haven' you read the question? It is on HT Motors.
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electricalexpert65
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#8
In reply to #4

Re: HT Motors

01/14/2012 12:24 AM

Nature of the load does not influence the magnitude of the starting current. It only influences the starting time. Pl. be careful while answering questions in aforum.
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electricalexpert65
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#7

Re: HT Motors

01/14/2012 12:21 AM

Starting current of a motor is always the charecreristic of the given motor and it depends upon the motor impedances (both stator impedance & rotor impedance ) and the slip of the motor.
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electricalexpert65 (4); JRaef (1); king.faisal (1); lyn (1); TonyS (1); zaheer khan (1)

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