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Transformer Bushing

Transformer Bushing

Transformer Bushing

(OP)
Good day!

I'd like to know how does frequency affect the long term performance of a transformer bushing.  Our system is 60hz but we have a polymer transformer bushing which is apparently rated 50hz.  Is the effect significant?

CK

RE: Transformer Bushing

Wouldn't think so...

RE: Transformer Bushing

(OP)
I understand that frequency has a negative effect on insulation materials. The higher the frequency the lower the dielectric strength of the insulation material.  How does this theory affect a transformer bushing especially if it is made up of SiR outer sheds?  Would the total dielectric strength of the bushing be significantly reduced at 60Hz?

Also, since the capacitance of a paricular bushing is constant, the bushing will have lower capacitive reactance (about 0.833) at 60Hz than at its designed 50hz application.  How does it affect the operation of the bushing?

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