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Capacitor Discharge Standard


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#1 kada

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Posted 24 September 2010 - 01:25 PM

Hi there!

Is there any standard or at least best practise for answering the folowing question:
How fast should DC-link capacitor be discharge? Does the AC drive designer have to follow any standard?

Thanks in advance

Kada

#2 jOmega

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Posted 24 September 2010 - 05:10 PM

QUOTE (kada @ Sep 24 2010, 07:25 AM) <{POST_SNAPBACK}>
Hi there!

Is there any standard or at least best practise for answering the folowing question:
How fast should DC-link capacitor be discharge? Does the AC drive designer have to follow any standard?

Thanks in advance

Kada



I seem to recall that in the USA, there is a standard that requires the dc bus caps be discharged to less than 50 volts within 1-minute.

Don't recall if it was a U.L./CUL (UL-508?) or NFPA or NEMA standard...but there was/is a standard that drive designers must
comply with.




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