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SEL-751A Modeled in ETAP

SEL-751A Modeled in ETAP

(OP)
Good day all,

With the available settings in ETAP in reference to the SEL-751A, how do I incorporate the fiber-optic arc-flash detector to lower the category of the busses that I am faulting. The only curves I can alter are the normal phase, neutral, ground, and negative sequence overcurrent and instantaneous settings. I would assume there is a way to introduce the extra arc flash mitigation of the 751A, but I'm at a loss.
Any ETAP specialist out there that can steer me in the right direction?

Thank you in advance,

RE: SEL-751A Modeled in ETAP

In the past, for arc flash detection on specific busses I will create a new scenario in which I force clearing time to that of an arc flash event. I generally use a half cycle for pickup and processing, half cycle for contact assertion, and three or five cycles for breaker clearing (depending on breaker).

RE: SEL-751A Modeled in ETAP

As ZeroSeq as said - the only way you can incorporate such a feature is to manually trigger the clearing/trip time of the protective device at the fault location based on manufacturers test data.

RE: SEL-751A Modeled in ETAP

This can be modeled in ETAP for any protective device as mentioned, but unless the manufacturer will guaranty this system will work on all instances of arc fault (which they won't; I've asked) I would not include it in an AF calculation.

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