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satishhar
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Join Date: Mar 2011
Location: Karnataka, India
Posts: 30

Numerical Over Current and Earth Fault Relay

03/05/2016 1:23 AM

Explain the relay output if the setting is as follows

In 33KV system Actual CT ratio is 50/5A, and the current setting in relay is 0.1, and the CT ratio entered in relay is 50/1. Then what would be the relay output (at which current relay would trip)

Thanks in advance

Sathish

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TonyS
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#1

Re: Numerical Over current and Earth fault Relay

03/05/2016 8:23 AM

Do your own homework

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satishhar
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Location: Karnataka, India
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#3
In reply to #1

Re: Numerical Over current and Earth fault Relay

03/05/2016 12:35 PM

Dear TonyS,

OK......

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RAMConsult
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#2

Re: Numerical Over current and Earth fault Relay

03/05/2016 9:04 AM

Basic interview question, how did you respond?

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mukeshkumar5609
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Join Date: Jun 2011
Location: Lucknow , Uttar Pradesh , India
Posts: 15
#4

Re: Numerical Over Current and Earth Fault Relay

03/14/2016 1:37 PM

CT Ratio entered in relay is 50/5 and setting is 0.1 that means 0.1 equal to 5 .its means setting is on 5 Amp. CT ratio is 50/5 than your relay setting is on 5 equal to 50 amp.

Thanks

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