220kv oil immersed power transformers are used in 230kv or 252kv power system.

Feature:

  220kv on-load-tap-changing power transformer is made of high-quality silicon-steel sheets,and laminated by steps,it is advantageous in low loss,low noise ,low voltage partial discharge and high anti short circuit  capacity.the dynamical and thermal stability of this transformer ,of which the coils are winded by high-quality oxygen-free copper wire as well as used pre-compressing brackets processes and interior and exterior structure.

420000/220kv 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	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

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