MANUFACTURING FEATURES
MAGNETIC
CORE
It is made from cold roller grain oriented steels with joints at 45°C.
Cutting, mounting and check of correct losses values are carried out
at our works. Since these procedures are performed directly by us these
components are promptly available; moreover we can obtain noise level
values lower than those prescribed by DIN and NEMA standards.
HV side consist of more coils generally made of aluminium strip insulated by interposition of polyester film. The winding frame is then casted in resin under vacuum following a special treatment whose result is a winding free of any partial discharge.
LV side is normally manufactured by using aluminium tape whose height is equal to the whole HV coil one so as to eliminate any possible axial electrodynamic stress which can occur under short circuit condition. Coils insulation method is carried out by using materials impregnated under vacuum with H class varnish.
As an alternative insulation can be made by epoxy resin casting that is to say by following the same procedure as per HV side.
"F" for standard transformers
(100°C temperature rise)
"B" on request
(80°C temperature rise)
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WINDINGS
HV CONSTRUCTION
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TRANSFORMER
ASSEMBLY
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