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cckla
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Join Date: May 2013
Posts: 66

Circuit Breaker

09/18/2014 3:44 AM

What is the difference between instantaneous type and inverse time circuit breaker ? Is the Class B or C MCB classified in one of the above ?
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kvsridhar
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#2

Re: Circuit Breaker

09/18/2014 4:18 AM

As i told you before, you must learn by reading books, webpages etc. For example, see this : Inst and inverse

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lyn
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Join Date: Oct 2008
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#3

Re: Circuit Breaker

09/18/2014 9:46 AM

Ask your tutor.
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PeterT
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#4

Re: Circuit Breaker

09/18/2014 3:31 PM

The difference is just what the names say:

Instantaneous trips on current above the pickup setting "instantaneously" with no intentional time delay (usually just a few cycles).

Inverse time says that there in an inverse relationship between the level of current sensed and the time it takes the breaker to trip. If the current is only slightly above the pickup setting, the breaker takes a long time to trip (determined by the trip curves). If the current is many times the pickup setting, the breaker trips more quickly.

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Circuit Breaker
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#5
In reply to #4

Re: Circuit Breaker

09/19/2014 5:44 PM

Sounds complicated! Can you run that by again? Does it trip slower or faster south of the equator? LOL -- JHF

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Munster
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#6
In reply to #5

Re: Circuit Breaker

09/20/2014 11:46 AM

Only on the northern slope of the south side

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Circuit Breaker
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#7
In reply to #6

Re: Circuit Breaker

09/22/2014 11:50 AM

Thanks! Perfectly clear now! - JHF

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Anonymous Poster (1); Circuit Breaker (2); kvsridhar (1); lyn (1); Munster (1); PeterT (1)

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