- Place of Origin: Beijing, China (Mainland)
- Brand Name: Daelim
- Model Number: SFSZ9 SFSZ10 SFSZ11
- Usage: Electronic
- Phase: Three
- Coil Structure: Toroidal
- Coil Number: Two-winding
- Product name: 220KV Power Transformer
- Cooling syestem: ONAN/ONAF
- Type: Three Phase
- Material: Copper
- Rated power: 31500kva
- Input voltage: 220kv
- Output voltage: 6.3/6.6/10.5/11/20/34.5/66/69kv
- Connection symbol: YNd11
- Frequency: 50/60Hz
- Standard: ANSI C57.12
Packaging & Delivery
|Packaging Details:||International standard package or As client's request.|
|Delivery Detail:||60 days after confirm drafting|
220 kV Three-phase Two Winding On-Load-Tap-Changing Power Transformer
Amount of local discharge: The apparent discharge amount under 1.5 times of rated voltage is less than 80pC.
Noise: Product of 63MVA and below is lower than 58dB(AN).
Power loss: no-load loss is. 30% lower than that of IEC standard.
Reliablity: 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 "KEMA" quality Control syestem.
The high-voltage(HV) coil adopts an interleaved-continuous structure to improve the voltage characteristics under impact voltage and make voltage evenly distributed. All stays and pads are chamfered to keep highly reliable inulation.
In the transformer winding there is a zigzag il 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 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 line with the cut burrs controlled within 0.02mm.
The silicon sheet fabrication adopts"no-upeer yoke-lapped" technology and all lapped joints of the silicon sheet are 45 full-miters. The laminated core sheet are integrally pressed and adhered with epoxy resin to make the three-leg two-yoke core a strong and flat integral one with good verticality precision, this effectively improves no-load performance and reduces noise.
Oil tank and accessories
The tank wall adopts wide steel sheet, which will be folded into corrugated structure without splicing, in this way welds are decreased and mechanical strength is enhanced; meanwhile, the corrugated wall has diverging effect, and thus plays a role in decrease of noise. The routing troughts and control cabinets of the secondary circuit are all made of stainless steel, so the entire transformer has a simple and good looking.
All sealing surfaces use quality sealing material and are precision-machined.
|Main Technical Parameters for three-phace two winding on-load-tap-changing power transformer|
|No-load loss(KW)||On-load loss(KW)||No load|
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International standard package ,proper for any special customer air or sea requirements,one set one case or as client's request.