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What's the difference between partial discharge and stremers? 1

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SamBones

SamBones

Electrical
Aug 5, 2006
2
Hello


Can you please tell me what's the difference between partial discharge and stremers?

Thank you in advance.

Regards
SamBones
 
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Partial discharge is what happens in gas (mostly air) pockets inside an insulation system. It produces ozone (O3) and the ozone breaks down insulation so you get insulation breakdown after a few years.

Streamers are precursors to flash-over in air (or along a surface). If you get streamers during PD test, you probably have sharp edges on bolts, wires, connectors etcetera.

Gunnar Englund
 
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