220KV, 110KV, 66KV transformer

EACHER brand 220KV, 110KV and 66KV low-loss series transformer is our independently developed new generation of transformers on the basis of absorption of domestic and foreign advanced technology, which features low local discharge, low loss, low noise, high reliability, strong protection against abrupt short circuit. Its excellent performance has been recognized by wide users and highly appraised by experts. The full-sealed suspending-cover free products sell well nationwide.
Amount of local discharge: the apparent discharge amount under 1.5 times of rated voltage is less than 80pC;
Noise: products of 63MVA and below is lower than 58Db(AN);
Power loss: no-load loss is 30% lower than that of IEC standard;
Reliability: all in-service products have no damages or oil leakage occurred;
Short circuit withstanding: model SFZ11-50000/132 smoothly passed the short-circuit withstanding test of the national transformer quality supervision and inspection center and also passed Holland ÿ¯KENAÿ?quality control system.
COIL
The H.V. coil adopts an interleaved-continuous structure to improve the voltage characteristic under impact voltage and make voltage evenly distributed. All stays and pads are chamfered to keep highly reliable insulation.
In the transformer winding there is a zigzag oil guide structure so as to fully cool all areas inside the winding, lower the temperature rise of the winding and the hot points of the winding and prolong the service life of insulation. The H.V. and MV regulation system are independently provided with voltage-regulating winding to balance the ampere turn of each winding, effectively lower the axial electrodynamic force generated at short-circuit of transformer and improve abrupt short-circuit withstanding capacity.
The winding adopts radial ÿ?ÿ?margin design, between the core and the paper sleeve of L.V. winding, and between the L.V., H.V. ,voltage-regulation windings, as well as before insertion of stays and shroud plate the are fully dried and tightly matched to ensure extremely good compactness and concentricity of the entire winding.
DOMINANT PRODUCT:
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