220kV Power Transformer

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220kV three-phase oil immersed on-load voltage regulating power transformer. It is characteristic of compact construction, low weight, high efficiency, low loss and low noise, reliability of performance....

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220kV three-phase oil immersed on-load voltage regulating transformer brings about a series of major transformations in terms of material, technique and construction. It is characteristic of compact construction, low weight, high efficiency, low loss and low noise, reliability of performance. The product can reduce considerable loss on energy grid and operational costs and extend distinct economic efficacy.

It is suitable for power plant, transformer substation, and large-scale industrial and chemistry factory and etc. the product is according to national and IEC standards.

Environmental Conditions

1. Type: outdoor
2. Ambient temperature: max. temperature: +40℃; min. temperature: -30℃
3. Altitude: ≤1000m (temperature rise shall be corrected when＞1000m)
4. Relative humidity: ≤90% (25℃)
5. Installation place: without corrosive gas and apparent fouling.

220kV Three-phase Duplex-winding Non-field Excitation Changing Power Transformer

Rated capacity （kVA）	Voltage ratio		Vector group	No-load loss （kW）	load loss （kW）	No-load current （%）	Short circuit impedance （%）
Rated capacity （kVA）	HV	LV	Vector group	No-load loss （kW）	load loss （kW）	No-load current （%）	Short circuit impedance （%）
31500	220±2×2.5% 242±2×2.5%	6.3 6.6 10.5	YNd11	28.0	128	0.56	12-14
40000				32.0	149	0.56
50000				39.0	179	0.52
63000				46.0	209	0.52
75000		10.5 13.8		53.0	237	0.48
90000				64.0	273	0.44
120000				75.0	338	0.44
150000		10.5、13.8 15.75 18、20		89.0	400	0.40
160000				93.0	420	0.39
180000				102	459	0.36
240000				128	538	0.33
300000		15.75 18 20		154	641	0.30
360000				173	735	0.30
370000				176	750	0.30
400000				187	795	0.28
420000				193	824	0.28

Above mentioned parameter are only for reference, ROCKWELL is able to design products according to specific requirementsfrom end users.

220kV Power Transformer drawing

220kV Three-phase Three-winding Non-field Excitation Changing Power Transformer

Rated capacity（KVA）	voltage combination and range of tapping			Vector group	no-load loss(KW)	Load loss(KW)	No-load current(%)	short circuit impedance(%)
Rated capacity（KVA）	HV	MV	LV	Vector group	no-load loss(KW)	Load loss(KW)	No-load current(%)	step up	step down
31500	220±22.5%；230±22.5%；242±2*2.5%；	69；115；121	6.3/6.6/10.5/21/36/37/38.5	YNyn0d11	32	153	0.56	HV-MV:22-24;HV-LV:12-14;MV-LV:7-9	HV-MV:12-14;HV-LV:22-24;MV-LV:7-9
40000					38	183	0.5
50000					44	216	0.44
63000					52	257	0.44
90000			10.5/13.8/21/36/37/38.5		68	333	0.39
120000			10.5/13.8/21/36/37/38.5		84	410	0.39
150000			10.5/13.8/15.75/21/36/37/38.5		100	487	0.33
180000					113	555	0.33
240000					140	684	0.28
300000					166	807	0.24

Above mentioned parameter are only for reference, ROCKWELL is able to design products according to specific requirementsfrom end users

220kV Low Voltage 66kV Three-phase Duplex-winding Non-field Excitation Changing Power Transformer

Rated capacity（KVA）	voltage combination and range of tapping		Vector group	no-load loss(KW)	Load loss(KW)	No-load current(%)	short circuit impedance(%)
Rated capacity（KVA）	HV	LV	Vector group	no-load loss(KW)	Load loss(KW)	No-load current(%)	short circuit impedance(%)
31500	220±22.5%；230±22.5%；	63,66,69	Ynd11	30	143	0.71	12-14
40000				36	167	0.71
50000				42	200	0.65
63000				50	234	0.65
90000				66	306	0.6
120000				81	367	0.6
150000				97	430	0.54
180000				110	487	0.54
240000				136	603	0.48

Above mentioned parameter are only for reference, ROCKWELL is able to design products according to specific requirements from end users.

220kV Three-phase Three-winding Non-field Excitation Changing Self-coupled Power Transformer

Rated capacity（KVA）	voltage combination and range of tapping			Vector group	step up combination			Step down combination			short circuit impedance
Rated capacity（KVA）	HV	MV	LV	Vector group	no-load loss(KW)	Load loss(KW)	No-load current	no-load loss(KW)	Load loss(KW)	No-load loss	step up	step down
31500	220±22.5%；230±22.5%；242±2*2.5%；	115,121	6.6/10.5/21/36/37/38.5	YNa0d11	20	111	0.45	17	94	0.4	HV-MV:12-14;HV-LV:8-12;MV-LV:14-18	HV-MV:8-10;HV-LV:28-34;MV-LV:18-24
40000					23	136	0.45	20	114	0.4
50000					27	161	0.4	24	136	0.34
63000					32	190	0.4	28	162	0.34
90000					40	262	0.34	36	222	0.28
120000			10.5/13.8/15.75/18/21/36/37/38.5		49	323	0.34	44	273	0.28
150000					58	384	0.28	52	324	0.26
180000					67	439	0.28	60	367	0.26
240000					79	545	0.26	71	478	0.2

Above mentioned parameter are only for reference, ROCKWELL is able to design products according to specific requirementsfrom end users.

220kV Three Phase Double Windings Power Transformer With On Load Tap Changer

Rated capacity（KVA）	voltage combination and range of tapping		Vector group	no-load loss(KW)	Load loss(KW)	No-load current(%)	short circuit impedance(%)
Rated capacity（KVA）	HV	LV	Vector group	no-load loss(KW)	Load loss(KW)	No-load current(%)	short circuit impedance(%)
31500	220±22.5%；230±22.5%；	6.3/6.6/10.5/21/36/37/38.5	Ynd11	30	128	0.57	12-14
40000				36	149	0.57
50000				43	179	0.53
63000				50	209	0.53
90000				64	273	0.45
120000		10.5/21/36/37/38.5		79	338	0.45
150000				92	400	0.41
180000				108	459	0.38
120000				81	337	0.45
150000		66;69		96