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niteshvala
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Join Date: May 2012
Location: India
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High Set/Low Set Protection in Electrical

05/14/2012 5:15 AM

What is high set/ low set protection in electrical system?

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Anonymous Poster #1
#1

Re: High set /low set protection in Electrical.

05/14/2012 5:34 AM

http://lmgtfy.com/?q=What+is+high+set+%2F+low+set+protection+in+electrical+system%3F
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electricalexpert65
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#2

Re: High Set/Low Set Protection in Electrical

05/14/2012 9:59 AM

Low set is electronic equivalent of the overcurrent protection in earlier generation electromechanical protection relays. This is set in terms of percentage of rated current (i.e.) from 20% to 200%.

Whereas highset in the electronic equivalent of the short circuit protection in earler generation electromechanical relays. This is set in terms of multiples of rated current (i.e.) from 2 times to 16 times.
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Candlez
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#3

Re: High Set/Low Set Protection in Electrical

05/14/2012 12:43 PM

Agree with comments no 2. Would add:

High set is instantaious, low set follows time current characterisc curve.
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electricalexpert65
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#4
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Re: High Set/Low Set Protection in Electrical

05/15/2012 10:39 AM

Not necessarily! Today's nemerical relays offer a time delay for highset elements for co-ordination purposes rangung from 50 milliseconds to 2 seconds.
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