I. Product Description

220kV oil-immersed power transformer is the carefully designed, continuous improved new products, which is combined with existing successful technology and experiences at home and abroad. It has the characteristics of compact and reliable structure, low loss, low noise, excellent performance.

II. Technical Parameters

1. 220KV S11 Series Three-Phase Double-Winding No-Load Voltage Regulation Transformer

Rated Capacity (KVA)	Voltage Combination and Tapping Range (KV)		Connection Symbol	No-Load Loss (W)	Load Loss (W)	No-Load Current (%)	Short-Circuit Impedance (%)
	High-Voltage	Low-Voltage
31500	220±2×2.5% 242±2×2.5%	6.3 6.6 10.5 11	YNd11	28	128	0.70	12-14
40000				33	149	0.70
50000				39	180	0.65
63000				47	209	0.65
75000		10.5 11 13.8		54	238	0.60
90000				62	274	0.55
120000				75	328	0.55
150000		11 13.8 15.75 18 20		90	385	0.50
160000				94	404	0.49
180000				102	436	0.46
240000				128	539	0.42
300000		15.75 18 20		151	641	0.38
360000				174	735	0.38
370000				177	751	0.38
400000				187	795	0.35
420000				194	825	0.35

Note:

• 1. If necessary, rated capacity less than 31500KVA and other voltage combined transformers may be supplied.
• 2. If necessary, transformer of LV 35KV and 38.5KV may be supplied.
• 3. Priority to no-tapping structure. If necessary tapping terminals may be set.

2. 220KV SZ11 Series Three-Phase Double-Winding On-Load Tap-Changing Transformers

Rated Capacity (KVA)	Voltage Combination and Tapping Range (KV)			Connection Symol	No-Load Loss (W)	Load Loss (W)	No-Load Current (%)	Short-Circuit Impedance (%)
	High-Voltage	Medium-Voltage	Low-Voltage					Up	Down
31500	220±2×2.5% 242±2×2.5%	69 115 121	6.3 6.6 10.5 11 35 37 38.5	YNyn0d11	32	154	0.70	(H-M): 22-24 (H-L): 12-14 (M-L): 7-9	(H-M): 12-14 (H-L): 22-24 (M-L): 7-9
40000					39	180	0.63
50000					45	214	0.56
63000					53	248	0.56
90000			10.5 11 13.8 35 37 38.5		69	333	0.49
120000					85	410	0.49
150000			11 13.8 15.75 35 37 38.5		100	487	0.42
180000					114	556	0.42
240000					141	684	0.35
300000					166	808	0.30

Note:

• 1. Rated Capacity:(100/100/100)% step-up (100/50/100)%;step down (100/50/100)% or (100/50/100)%.
• 2.If necessary, rated capacity loss than 31500KVA and other voltage combine transformers may be supplied.
• 3. Priority to no-tapping structure. If necessary tapping terminals may be set.

3. 220KV S11 Series Three-Phase Double-Winding No-Load Voltage Regulation Transformers

Rated Capacity (kVA)	Voltage Combination and Tapping Range (kV)		Connection Symbol	No-Load Loss (W)	Load Loss (W)	No-Load Current (%)	Short-Circuit Impedance (%)
	High-Voltage	Low-Voltage
31500	220±2×2.5% 242±2×2.5%	6.3 6.6 10.5 11	YNd11	28	128	0.70	12-14
40000				33	149	0.70
50000				39	180	0.65
63000				47	209	0.65
75000		10.5 11 13.8		54	238	0.60
90000				62	274	0.55
120000				75	328	0.55
150000		11 13.8 15.75 18 20		90	385	0.50
160000				94	404	0.49
180000				102	436	0.46
240000				128	539	0.42
300000		15.75 18 20		151	641	0.38
360000				174	735	0.38
370000				177	751	0.38
400000				187	795	0.35
420000				194	825	0.35

Notes：

• 1. If necessary, rated capacity less than 31500KVA and other voltage combined transformers may be supplied.
• 2. If necessary, transformer of LV 35kV and 38.5kV may be supplied.
• 3. Priority to no-tapping structure. If necessary, tapping terminals may be set.

4. 220KV SZ11 Series Three-Phase Double-Winding On-Load Tap-Changing Transformers

Rated Capacity (kVA)	Voltage Combination and Tapping Range (kV)			Connection Symbol	No-Load Loss (W)	Load Loss (W)	No-Load Current (%)	Short-Circuit Impedance (%)
	High-Voltage	Medium-Voltage	Low-Voltage					Up	Down
31500	220±2×2.5% 242±2×2.5%	69 115 121	6.3 6.6 10.5 11 35 37 38.5	YNyn0d11	32	154	0.70	(H-M): 22-24 (H-L): 12-14 (M-L): 7-9	(H-M): 12-14 (H-L): 22-24 (M-L): 7-9
40000					39	180	0.63
50000					45	214	0.56
63000					53	248	0.56
90000			10.5 11 13.7 35 37 38.5		69	333	0.49
120000					85	410	0.49
150000			11 13.8 15.75 35 37 38.5		100	487	0.42
180000					114	556	0.42
240000					141	684	0.35
300000					166	808	0.30

Notes:

• 1. Rated capacity for load losses is (100/100/100)%; for step-up structure it is (100/50/100)%; for step-down structure it can be (100/100/50)% or (100/50/100)%.
• 2. If necessary, rated capacity less than 31500KVA and other voltage combined transformers may be supplied.
• 3. Priority to no-tapping structure. If necessary, tapping terminals may be set.

5. 220KV SS11 Series Three-Phase Three-Winding No-Load Voltage Regulation Transformers

Rated Capacity (kVA)	Voltage Combination and Tapping Range (kV)		Connection Symbol	No-Load Loss (W)	Load Loss (W)	No-Load Current (%)	Short-Circuit Impedance (%)
	High-Voltage	Low-Voltage
31500	220±8×1.25%	6.3 6.6 10.5 11 35 37 38.5	YNd11	31	128	0.70	12-14
40000				36	149	0.63
50000				43	180	0.56
63000				51	209	0.56
90000		10.5 11 35 37 38.5		64	274	0.49
120000				79	329	0.49
150000				93	385	0.42
180000				108	445	0.42
120000		66 69		82	337	0.49
150000				96	394	0.42
180000				112	451	0.42

6. 220KV SSZ11 Series Three-Phase Three-Winding On-Load Tap-Changing Transformers

Rated Capacity (KVA)	Voltage Combination and Tapping Range (KV)			Connection Symbol	No-Load Loss (W)	Load Loss (W)	No-Load Current (%)	Capacity Allocation	Short-Circuit Impedance (%)
	High-Voltage	Medium-Voltage	Low-Voltage
31500	220±8×1.25%	69 115 121	6.3 6.6 10.5 11 35 37 38.5	YNyn0d11	35	154	0.77	100/100/100 100/50/100 100/100/50	(H-M): 12-14 (H-L): 22-24 (M-L): 7-9
40000					42	180	0.70
50000					48	214	0.63
63000					56	248	0.63
90000			10.5 11 35 37 38.5		74	333	0.56
120000					92	410	0.56
150000					108	487	0.49
180000					125	599	0.49
240000					155	741	0.45

Note:

• 1. Data listed in the form are used for step-down transformers. Step-up transformers are also available upon request.
• 2. Rated capacity for load loss:(100/100/100)%.
• 3. Products with low-voltage of 6.3kV, 6.6kV, 10.5kV, and 11kV are not recommended.