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T10, T30, T60..???

09/19/2016 5:30 PM

How do you determine which terminal fault test duty to use when plotting a TRV envelope? I mean how to choose if it is T10, or T30,..or T100. What is actually T10, T30, Is it defined by the symmetrical fault current/the short circuit breaker rating? What value is the symmetrical fault at this case? Is it the maximum symmetrical fault going through the breaker at time of opening the breaker (3 cycles after the fault)?

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#1

Re: T10, T30, T60..???

09/19/2016 6:00 PM

1. Have the proper specifications to cover the equipment you are testing.

2. Understand their meaning.

3. Understand their applicability.

4. Read the requirements for the test.

5. Perform the test.

The reference library is down the hall.

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#2

Re: T10, T30, T60..???

09/19/2016 11:45 PM

How do you determine .... if your qualified for your job? Simple, how many questions you ask the CR4 community before you kill yourself or someone else from your lack of knowledge. Quit while your ahead and find another job that doesn't require math or have any safety issues associated with it.

Your homework will kill

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#3
In reply to #2

Re: T10, T30, T60..???

09/20/2016 12:28 AM

your you're

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#5
In reply to #2

Re: T10, T30, T60..???

09/20/2016 4:04 PM

Or if this continues he can quit after he is a head.

My guess (probably wrong again) is that T10, T30, T60 stands for 10, 30, or 60 milliseconds trip timer.

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Participant

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#4

Re: T10, T30, T60..???

09/20/2016 1:23 AM

http://www.ijcee.org/papers/287-E314.pdf

Pl check the link if it is for testing to HT circuit breaker.DT

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#6

Re: T10, T30, T60..???

01/15/2025 7:35 AM

This post is missing the context in which the <...terminal fault test duty to use when plotting a TRV envelope...> is being carried out. To deny this from the forum results in a TLA called the WAG occurring.

If the test protocol is not fully understood by the Technician performing it, then either further briefing from, or training by, the individual who wrote the test protocol is required, or the invitation to test needs to be declined until that has taken place.

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