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coolyaar
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Join Date: Jul 2011
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Motor Earth Fault Protection

06/04/2012 9:30 PM

what should be the recommended value of earth fault trip currents and time for a definite time earth fault relay.motor used is 3.3kv,450kw SCIM.
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SolarEagle
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#1

Re: motor earth fault protection

06/04/2012 9:56 PM

http://www.l-3.com/private/ieee/Motor%20Protection%20Principles.pdf

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TonyS
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#2

Re: Motor Earth Fault Protection

06/05/2012 1:31 AM

Follow the manufactures recommendations.

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coolyaar
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#3
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Re: Motor Earth Fault Protection

06/05/2012 8:33 AM

no motor manufacturer gives values of protection settings for their motors.if you know such manufacturer ,then tell me.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#4
In reply to #3

Re: Motor Earth Fault Protection

06/11/2012 3:59 AM

The motor manufacturer's details are on both the nameplate for the motor and also the purchse order or requisition that was used to acquire it. Neither can be seen from here.

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