EN 61000-4-4:2004 Compliance - Electrosurgical Unit Transient Voltage Pulse

W

WBubel - 2010

#1
I am currently have a Electrosurgical unit which is undergoing complience for 61000-4-4:2004. The unit is on but not activated, when the +- 2 KV pulse is applied to the ground of the Mains, the transient appears on the output. The transient pulse is 100 ns, 700 Vp-p. This is a ground referenced output. I'm being told that this unit failed.

My Question is: Will this transient constitute a dangerous condition to the patient?
 
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A

arios

#2
Whomever gave you the diagnostic of the unit should had made reference to an acceptance criteria. Were you told the criteria? Is it specified in the standard?

You are wondering about the potential impact on the patient which is appropriate to ask, but also the potential impact on other components or equipment likely to be used with yours could be considered as part of the essential requirements relevant to your product.
 
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M

martijnk

#4
Hi Wbubel,

I cannot answer your question, but i have a few suggestions to pass the test. You can try the following: put a netfilter on the mains (you can buy one at farnell for example) or try a ferrite bead on the mains lead. I needed both to pass the tests.

Good luck!

Martijn
 
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