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Discussion Starter · #1 ·
Got called to a machine today and smoke was pouring out of the panel, lots and lots of smoke. Found it to be a 480v rectifier for a brake unit. Hard to believe it did not blow the lpj-2 fuse. It even melted the Panduit under it.
That was the way I found it broke open like it is.


 

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http://www.electriciantalk.com/members/just-the-cowboy-44738/albums/bad-panels/3063-smoked.jpg
May have fused itself open before the time current curve was reached. How old is it?

5 months old. It is an excitation rectifier and will put out %50 of the line voltage for 3 cycles for a fast brake action, then %22 of the voltage to hold the brake.

 

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I've been wondering who was going to end up with that "little surprise". Too bad it was a dud. :censored: :laughing:

 
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