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| Stop Arc flash on a transformer https://brainfiller.com/arcflashforum/viewtopic.php?f=12&t=528 |
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| Author: | mahermi2 [ Thu Jul 02, 2009 8:32 am ] |
| Post subject: | Stop Arc flash on a transformer |
Does anyone have any ideas on how to stop arc flashes on a transformer without short circuiting it? We've thought of enclosing it in a grounded housing where the air vents are located on the bottom allowing the flash to blow out the top. Currently the air vents are located on the side allowing a possible arc to permiate through the spaces. |
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| Author: | jghrist [ Thu Jul 02, 2009 9:12 am ] |
| Post subject: | |
Am I missing something? Won't tripping the primary protective device stop the arc? |
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| Author: | McFlash [ Mon Jul 06, 2009 5:48 am ] |
| Post subject: | |
Depending on your system configuration you could implement a transformer differential scheme. This would clear a fault on the primary or secondary windings much quicker than typical overcurrent devices. |
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| Author: | mahermi2 [ Thu Jul 16, 2009 1:06 pm ] |
| Post subject: | |
What I'm looking at is ABB's REA 101 |
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| Author: | Zog [ Thu Jul 16, 2009 1:14 pm ] |
| Post subject: | |
mahermi2 wrote: Does anyone have any ideas on how to stop arc flashes on a transformer without short circuiting it? We've thought of enclosing it in a grounded housing where the air vents are located on the bottom allowing the flash to blow out the top. Currently the air vents are located on the side allowing a possible arc to permiate through the spaces.
WHat type of transformer (ratings)are you talking about? What is the OCPD on the primary? |
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| Author: | THE CABLE GUY [ Mon Sep 14, 2009 12:27 pm ] |
| Post subject: | |
I just looked up this ABB part. No answer to your question. But I have to read about this part more. It seems interesting. I wonder how much it cost. |
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| Author: | moreause [ Wed Nov 18, 2009 10:46 pm ] |
| Post subject: | |
that's an issue with some dry type transformer they are vented between elbow and eye level that is kind of dangerous some other model are at bottom and top of tranformer door those are more secure in case of a flash if you are near by |
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