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sethuamanj
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Join Date: Mar 2013
Posts: 14

Differential Slope Setting

06/02/2013 9:51 PM

hello engineers, from the differential relay manual, they recommended the setting for 1st bias slope setting is 1x tap change range. my transformer got 5 tap and range is 2.5% per tap. so total range is 5% from center.so can i set 0.05 setting for 1st bias slope.
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
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#1

Re: Differential Slope Setting

06/02/2013 10:49 PM

Then the total range is 10%.

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sethuamanj
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Join Date: Mar 2013
Posts: 14
#2
In reply to #1

Re: Differential Slope Setting

06/03/2013 2:38 AM

ok. let consider 10% can i set 0.1 slope setting ? plz make to understand clearly about differential relay setting. thanks you.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#3

Re: Differential Slope Setting

06/03/2013 3:23 AM

Once the make and part number of the equipment is to hand, the next step is to look up the information needed in the manual. If the manual is not to hand or the information needed isn't in there, then

the manufacturer directly.

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electricalexpert65
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Join Date: Oct 2009
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Good Answers: 169
#4

Re: Differential Slope Setting

06/03/2013 4:13 AM

Differential Relay Slope setting does not depend only upon the transformer tap range. It depends upon other parameters also such as error difference between the pairing CTs, the saturation level, pilot wire lengths, etc.
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