Power Transformer with Three-Phase up to 200mva 220kv

• Application: Power, Electronic, Instrument, Lighting, Rectifier, Audio
• Phase: Three
• Core: Core-type Transformer
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Two-winding Transformer
• Usage: Power
• Model NO.: SF11, S11, SFZ11
• Coil Number: Three-Phase Two-Winding
• Coil Structure: Toroidal
• Packaging Details: Sea Worthy Packing
• Transport Package: Worth Sea Packing
• Specification: ISO9001, ISO14001, CE Apply for IEC, JB, ANSI
• Trademark: EACHER
• Origin: Zhejiang, China (Mainland)
• Production Capacity: 50, 000 PCS/Year

Product Description

Power transformer up to 200mva 230kv
1 power transformer
2 ISO9001, ISO14001, OHSAS 18001, CE
3 Apply for IEC, ANSI
4. KEMA


Features:

1) Amount of local discharged: The apparent discharge amount is less than 80pC under 1.5 times of rated voltage;

2) Noise: Products of 63MVA and below is lower than 58 dB (AN);

3) Power loss: no-load loss is 30% lower than that of IEC standard;

4) Reliability: All in-service products have no damages or oil leakage occurred;

Application:

60 ~220 kV power system of power plant, substation, mining enterprise and etc.

Technologies:

Design: relative developed software are adopted in Electromagnetic calculations, strength analysis, leakage magnetic distribution, its electro-dynamic force and electrical insulation.

Manufacture:

Core: effectively upgrade transformer's no-load performance by below methods:

1) 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 burs controlled within 0.02mm.

2) 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 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 noises.

3) 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 section of oil tank is tightened with counter-pressure bolts. The upper iron and the upper section of oil tank are fixed at three locations. Hence the body inside the oil tank can withstand the vibration during transportation without any shift.

Winding:

1) 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 insulation.

2) 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 withstanding capacity.

3) The winding adopts radial "0" margin designed, 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 concentricity of the entire winding.

Oil tank and accessories

1) 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 troughs and control cabinets of the secondary circuit are all made of stainless steel, so the entire transformer has a simple and good looking.

2) All sealing surface use quality sealing material and are precision-machined.

3) On the edge of the tank there are double sealing grooves, and the outer sealing material is used to shade the atmosphere and ultra-ray to protect the inner sealing being damaged, thus at utmost prolonging service life and enhancing reliability of the seal.

Rated capacity (KVA)	Voltage		connection	9-type KW		10-type KW		11-type KW		No-load current (%)	Impedence voltage(%)
	H.V (KV)	L.V (KV)		No- Load Loss	Load-Loss	No- Load Loss	Load-Loss	No- Load Loss	Load-Loss
31500	220 240 ±2×2.5%	6.3	YNd11	35	135	31.5	128.3	28	128.3	0.7	12~14
40000		6.3		41	157	36.9	149.2	32.8	149.2	0.7
50000		10.5		49	189	44.1	179.6	39.2	179.6	0.65
63000		11		58	220	52.2	209	46.4	209	0.65
75000		10.5		67	250	60.3	237.5	53.6	237.5	0.6
90000		11		77	288	69.3	273.6	61.6	273.6	0.55
120000		11		94	345	84.6	327.8	75.2	327.8	0.55
150000		13.8		112	405	100.8	384.8	89.6	384.8	0.5
160000		11		117	425	105.3	403.8	93.6	403.8	0.49
180000		13.8		128	459	115.2	436.1	102.4	436.1	0.46
240000		15,75		160	567	144	538.7	128	538.7	0.42
300000		18		189	675	170.1	641.3	151.2	641.3	0.38
360000		20		217	774	195.3	735.3	173.6	735.3	0.38
370000		15.75		221	790	198.9	750.5	176.8	750.3	0.38
400000		18		234	837	210.6	795.2	187.2	795.2	0.35
4200000		20		242	868	217.8	824.6	193.6	824.6	0.35

 

 31500180000/220kv series three phase duplex winding regulating transformer with load:
 

Rated capacity (KVA)	Voltage		connection	9-type KW		10-type KW		11-type KW		No-load current (%)	Impedence voltage(%)
	H.V (KV)	L.V (KV)		No- Load Loss	Load-Loss	No- Load Loss	Load-Loss	No- Load Loss	Load-Loss
31500	220 240 ±2×2.5%	6.3	YNd11	38	135	34.2	128.3	30.4	128.3	0.7	12-14
40000		10.5		45	157	40.5	149.2	36	149.2	0.63
50000		35		54	189	48.6	179.6	43.2	179.6	0.56
63000		38.5		63	220	56.7	209	50.4	209	0.56
90000		10.5		80	288	72	273.6	64	273.6	0.49
120000		11		99	346	89.1	328.7	79.2	328.7	0.49
150000		35		116	405	104.4	384.8	92.8	384.8	0.42
180000		38.5		135	468	121.5	444.6	108	444.8	0.42