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ravimkumar
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Join Date: Apr 2011
Posts: 1

REFR

04/01/2011 2:40 AM

plz. send the wiring diagrom of this relay
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Tornado
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#1

Re: REFR

04/01/2011 3:03 AM

Are you kidding? What relay?

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kvsridhar
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#2
In reply to #1

Re: REFR

04/01/2011 3:14 AM

Heh heh..keep up with the times, the txtng lngg..... Restricted Earth Fault Relay.... rt OP?

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rakesh_semwal
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#3
In reply to #2

Re: REFR

04/01/2011 4:59 AM

No this is what he is looking for,
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PWSlack
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#4

Re: REFR

04/01/2011 6:40 AM

April 1st is such an odd day....

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loadshare
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#5

Re: REFR

04/01/2011 7:08 AM

hehehe :-)

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pravinba@yahoo.com
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Join Date: Dec 2010
Location: visakhapatnam, India
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#6

Re: REFR

04/01/2011 8:53 AM

Mr.Ravi we welcome you to this wonderful forum. Try to give maximum information while seeking help. Avoid abbreviations.
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Vinu_Answers
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Location: Noida, (U.P.), India.
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#7

Re: REFR

04/02/2011 2:17 AM

A Restricted Earth Fault (REF) means an earth fault from a restricted/localized zone of a circuit. The term "REF protection method " means not to sense any earth faults outside this restricted zone. REF is a type of "unit protection" applied to transformers or generators and is more sensitive than the method known as differential protection.

An REF relay works by measuring the actual current flowing to earth from the frame of the unit. If that current exceeds a certain preset maximum value of milliAmps (mA) then the relay will trip to cut off the power supply to the unit.

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kvsridhar
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#8
In reply to #7

Re: REFR

04/02/2011 4:51 AM

GA to you. Even though i can't read the diagram. We still don't know if what the OP refers to is a restricted earth fault relay. It can be a rare earth fertilisation relay for example. A good answer to a bad question

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