Function/usefullness of transfomer interleaving shield?
Function/usefullness of transfomer interleaving shield?
(OP)
Hi,
Our standard transformer specification requires "An earthed, interleaving shield shall be installed between the primary and secondary windings" for electrostatic reasons. A vendor has responded that they normally do not apply this to two winding transformers and to comply would require major changes to the original design.
Is anyone able to please provide their view on the value of interleaving shields? The transformer in question is a 10MVA 33kV/3.3kV Dyn11 transformer.
Many thanks in advance.
Our standard transformer specification requires "An earthed, interleaving shield shall be installed between the primary and secondary windings" for electrostatic reasons. A vendor has responded that they normally do not apply this to two winding transformers and to comply would require major changes to the original design.
Is anyone able to please provide their view on the value of interleaving shields? The transformer in question is a 10MVA 33kV/3.3kV Dyn11 transformer.
Many thanks in advance.






RE: Function/usefullness of transfomer interleaving shield?
I'm not sure why you would want to tie the hands of the designer with such a prescriptive specification. I would specify the required electrical parameters including system BIL, and the specification you want it built/tested to such as IEC, IEEE etc. Leave the detailed design upto the vendor.
Regards
Marmite
RE: Function/usefullness of transfomer interleaving shield?
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If we learn from our mistakes I'm getting a great education!
RE: Function/usefullness of transfomer interleaving shield?
David Castor
www.cvoes.com
RE: Function/usefullness of transfomer interleaving shield?
RE: Function/usefullness of transfomer interleaving shield?
The shield ahandle referring to is the earthing shield (isolating shield)between HV and LV winding to avoid transfer of harmonics anf HF noise from the connected load to the electric source.This used to be required for transformers feeding to thyristor drives etc.May be Skosgura can guide us further on the topic.
RE: Function/usefullness of transfomer interleaving shield?
RE: Function/usefullness of transfomer interleaving shield?
RE: Function/usefullness of transfomer interleaving shield?
Transformers used to test other transformers sometimes require a shield also.
RE: Function/usefullness of transfomer interleaving shield?
RE: Function/usefullness of transfomer interleaving shield?
Bill
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"Why not the best?"
Jimmy Carter
RE: Function/usefullness of transfomer interleaving shield?