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| retrofit breaker https://brainfiller.com/arcflashforum/viewtopic.php?f=4&t=119 |
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| Author: | Noah [ Mon Apr 28, 2008 1:53 pm ] |
| Post subject: | retrofit breaker |
I have a few retrofit breakers in my system (GE AK-25 c/w Amptector 1A trip unit). When I use PTW32 to run the arc flash study, I found the trip/delay time of these breakers are only 2 or 3 cycles. I was told that I don't need to add breaker opening time to it. Has anyone seen such a fast action in your study before? Thanks in advance! |
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| Author: | Zog [ Mon Jun 02, 2008 8:42 pm ] |
| Post subject: | |
Noah wrote: I have a few retrofit breakers in my system (GE AK-25 c/w Amptector 1A trip unit). When I use PTW32 to run the arc flash study, I found the trip/delay time of these breakers are only 2 or 3 cycles. I was told that I don't need to add breaker opening time to it. Has anyone seen such a fast action in your study before? Thanks in advance!
Not for that one, you need to add operating time, amptectors are more like 7 or 8 cycles for INST if I recall, contact GE for actual trip times or better yet, upgrade that Amptector 1A to something that actually works. |
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