- Place of Origin: Shanghai, China (Mainland)
- Brand Name: SEMC
- Model Number: 220KV 110KV 66KV Transformer
- Phase: Three
- Coil Structure: Interleaved-continuous
Packaging & Delivery
|Packaging Details:||plywood case for parts, nude for main machine|
|Delivery Detail:||120days after the order confirmation.|
low local discharge
low loss,low noise,high rliability
strong protection against abrupt short circuit.
220KV 110KV 66KV Transformer
EACHER brand 220kv,110 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 fullp-sealed suspending-cover free products sell well nationwide.
Amount of local discharge:The apparent discharge amout 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 quiality supervision and inspection center and also passed Holland "KEMA" quality Control system.
The high-voltage(HV) coil adopts an interleaved-continuous structure to imporove the voltage characteristics under inmpact 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 HV 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 with standing capacity.
The winding adopts radial "0" margin design,between the core and the paper sleeve of LV winding,and between the LV,HV,voltage-regulating windings,as well as before insertion of stays and shroud plate they are fully dried and tightly matched to ensure extremely good compactness and concertricity of the entire winding.
The core is made of high-permeable grain-orientated top quality cold-rolled silicon sheet and the material is cut with advanced Germany Geoge GmbH automatic shear lin with the cut burrs controlled within 0.02mm.
The silicon sheet fabrication adopts "no-upper yoke-lapped" technology and all lapped joints of the silicon sheet are 45' full-miters. The laminated core sheets are integrally pressed and adhered with epoexy resin to make the tress-leg two-yoke core a strong and flat integral one with good verticality precision,this effectively improves no-load performance and reduces noise.
Bracing plates are used as support between coil leg and inner coil. The iron yoke is tied with epoxy resin-impregnated glass fiber band, and the lower iron yoke and the lower section of oil tank is tightened with counter-pressure bolts.The upper iron yoke and the upper section of oil tank are fixed at 3 locations. Hence the body inside the oil tank can withstand the vibration during transportation without any shifit.
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