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220kV 31500kVA Oil Immersed Power Transformer

220kV 31500kVA Oil Immersed Power Transformer2 (1)

220kV 31500kVA Oil Immersed Power Transformer2 (2)

220kV 31500kVA Oil Immersed Power Transformer

Name: China 220kV 31500kVA Oil Immersed Power Transformer Manufacturers Suppliers Factory - GNEE Electric
Brand: GNEE Electric
SKU: 271806959

Type:Oil-Immersed
Phase:Three Phase
Rated Capacity: 31500kVA-420000kVA
Vector Group:YNa0d11, YNyn0d11, YNd11
High Voltage:220KV-242KV
Low Voltage:6.3KV-38.5KV
Nature of Business:Manufacturer
‌Certification:‌ ISO 9001, SGS (Environmental & Safety Compliance)
‌Advantages:‌ High efficiency & energy saving, low noise, fully sealed leak-proof design. The 220kV oil filled transformer structure ensures long-term stable operation.

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Tel: +8615824687445

Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of 220kv 31500kva oil immersed power transformer in China. If you're going to buy customized 220kv 31500kva oil immersed power transformer made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.

Product Introduction of 220kV Oil Immersed Power Transformer

The 220kV Oil Immersed Power Transformer is a core high-voltage power transmission device. Utilizing advanced silicon steel sheets and mineral oil insulation technology, it reduces losses by 20%, making it ideal for power grids, industrial sites, and renewable energy projects. Its fully sealed tank design (220kV Oil Immersed Transformer) effectively prevents oxidation and moisture ingress, extending service life to 30+ years. Built-in smart monitoring interfaces enable real-time tracking of oil temperature and load data. The modular construction of this 220kV oil filled transformer simplifies maintenance, meeting customer demands for reliability, energy efficiency, and intelligent operation.

Core Advantages of Oil Immersed Transformer

‌High Efficiency & Energy Saving:‌ No-load loss ≤55kW, load loss ≤250kW (220kV Oil Immersed Power Transformer standard).

‌Safety & Reliability:‌ Passes extreme tests (lightning strike, short-circuit); failure rate <0.5% (220kV Oil Immersed Transformer).

‌Eco-Friendly Design:‌ Biodegradable insulating oil, noise level ≤65dB (220kV oil filled transformer environmental certification).

‌Smart Compatibility:‌ Supports IoT remote monitoring and SCADA system integration.

‌Customization Service:‌ Voltage ratios and capacity adjustable on demand; lead time reduced by 30%.

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Products parameter

S20-220KV 31500KVA-420000KVA Three Phase Double Winding Non-Excitation Voltage Regulating Power Transformer
Rated Capacity (KVA)	Voltage Combination and Tapping Range		Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Impedance (%)
Rated Capacity (KVA)	HV (KV)	LV (KV)	Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Impedance (%)
31500	220±2x2.5% 242±2x2.5%	6.3 6.6 10.5	YNd11	18	115	0.56	12-14
40000				21	134	0.56
50000				25	161	0.52
63000				30	188	0.52
75000		10.5 13.8		34	213	0.48
90000				40	246	0.44
120000				49	304	0.44
150000		10.5 13.8 15.75 18 20		58	360	0.4
160000				60	378	0.39
180000				66	413	0.36
240000				83	484	0.33
300000		15.75 18 20		98	577	0.3
360000				112	662	0.3
370000				114	675	0.3
400000				122	716	0.28
420000				125	742	0.28
Note: 1. Transformers with a rated capacity less than 31500kVA and other voltage combinations can also be provided according to requirements. 2. transformer with low voltage of 35kV can also be provided according to requirements. 3. The non tapping structure is preferred, and taps can be set if required. 4. When the annual average load rate of transformer is between 45% and 50%,the highest operation eficiency can be obtained byusing the loss value in the table.

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SS22-220KV 31500KVA-300000KVA Three Phase Three Winding Non-Excitation Voltage Regulating Power Transformer
Rated Capacity (KVA)	Voltage Combination and Tapping Range			Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Impedance (%)
Rated Capacity (KVA)	HV (KV)	MV (KV)	LV(KV)	Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Step Up	Step Down
31500	220±x2.5% 230±2x2.5% 242±2x2.5%	69 115 121	6.3 6.6 10.5 21 36 37 38.5	YNyn0d11	18	138	0.48	HV-MV 22-24 HV-LV 12-14 MV-LV 7-9	HV-MV 12-14 MV-LV 22-24 MV-LV 7-9
40000					21	165	0.42
50000					24	194	0.36
63000					29	231	0.38
90000			10.5 13.8 21 36 36 37 38.5		37	300	0.33
120000			10.5 13.8 21 36 36 37 38.5		46	369	0.33
150000			10.5 13.8 15.75 21 36 37 38.5		55	438	0.28
180000					62	500	0.28
240000					72	616	0.22
300000					91	726	0.2
Note: 1. The capacity distribution ofthe load in the table is (100 / 100 / 100)%; The capacity distribution of boost structure can be (100 / 50/ 100)%; The capacity allocation of Buck structure can be (100 /100/50)% or (100/50 /100)% 2. Transformers with rated capacity less than 31500kv, A and other voltage combinations can also be provided according to requirements, 3. The transformer with low voltage of 35kV can also be provided; 4. The non tapping structure is prefered, and taps can be set if required; 5. When the annual average load rate of transformer is about 45%, the highest operation efficiency can be obtained by using the loss value in the table.

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SSZ20-220KV 31500KVA-240000KVA Three Phase Three Winding OLTC Power Transformer
Rated Capacity (KVA)	Voltage Combination and Tapping Range			Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Capacity Allocation (%)	Impedance (%)
	HV (KV)	MV (KV)	LV(KV)
31500	220±8x1.25% 230±8x1.25%	69 115 121	6.3 6.6 10.5 21 36 37 38.5	YNyn0d11	23	138	0.63	100/100/100 100/50/100 100/100/50	HV-MV 12-14 HV-LV 22-24 MV-LV 7-9
40000					27	165	0.60
50000					31	194	0.60
63000					36	231	0.55
90000			10.5 21 36 37 38.5		47	300	0.44
120000					60	369	0.44
150000					70	438	0.39
180000					81	538	0.39
240000					100	667	0.35
Note: 1. The data listed in the table are applicable to step-down structure products, and step-up structure products can also be provided as required; 2. A transformer with 35kV low voltage can also be provided according to requirements; 3. When the annual load rate of the transformer is between 45% and 50%,the highest operation efficiency can be obtained by using the loss value in the table.

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S11-220KV 3150KVA-240000KVA Three Phase winding non-excitation voltage regulating autotransformer
Rated Capacity (KVA)	Voltage Combination and Tapping Range			Vector Group	Step Up Combination			Step Down Combination			Impedance (%)
Rated Capacity (KVA)	HV (KV)	MV (KV)	LV(KV)	Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Step Up	Step Down
31500	220±2x2.5% 230±2x2.5% 242±2x2.5%	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	0.16	71	478	0.2
Note: 1. The capacity allocation of the step-up structure is (100 / 50 / 100)9%, and that of step-down structure is (100 / 100 / 50)%, 2. The short circuit impedance in the table is 100% of the rated capacity; 3. Transformer with low voltage of 35kV can also be provided on request, 4. The non-tapping structure is preferred, and taps can be set if required; 5. When the annual load rate of the transformer is about 40%,the highest operation eficiency can be obtained by using the loss value in the table.

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SSZ20-220KV 31500KVA-300000KVA Three Phase Three Winding Non Excitation Voltage Regulating Power Transformer
Rated Capacity (KVA)	Voltage Combination and Tapping Range			Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Impedance (%)
Rated Capacity (KVA)	HV (KV)	MV (KV)	LV(KV)	Vector Group	No Load Loss (KW)	Load Loss (KW)	No Load Current (%)	Step Up	Step Down
31500	220±2x2.5% 230±2x2.5% 242±2x2.5%	69 115 121	6.3 6.6 10.5 21 36 37 38.5	YNyn0d11	21	138	0.56	HV-MV 22-24 HV-LV 12-14 MV-LV 7-9	HV-MV 12-14 MV-LV 22-24 MV-LV 7-9
40000					25	165	0.5
50000					29	194	0.44
63000					34	231	0.44
90000			10.5 13.8 21 36 37 38.5		44	300	0.39
120000			10.5 13.8 21 36 37 38.5		55	369	0.39
150000			10.5 13.8 15.75 21 36 37 38.5		65	438	0.33
180000					73	500	0.33
240000					91	616	0.28
300000					108	726	0.24
Note: 1. the capacity distribution of the load in the table is (100/100/100)%; The capacity distribution of the step up structure can be(100/50/100)%; The capacity distribution of the step-down structure can be (100/100/50)%, or (100/50/100). 2. transformers with rated capacity less than 31500kva and other voltage combinations can also be provided as reguired. 3. transformers with low voltage of 35kV can also be provided. 4. the non-tap structure is preferred, lf required by operation, tap can be set. 5. when the average load rate of the transformer is about 45%, the maximum operating efficiency can be obtained by using the loss value in the table.

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Installation Guide of 220kV Oil Immersed Power Transformer

‌Foundation Verification:‌ Level tolerance ≤3mm/m².

‌Lifting & Positioning:‌ Use specialized clamps to protect the 220kV Oil Immersed Transformer bushings.

‌Oil Handling:‌ Vacuum drying before oil filling (dew point ≤-40°C).

‌Electrical Testing:‌ Includes winding resistance, ratio, and insulation resistance tests (220kV oil filled transformer testing standard).

‌Commissioning:‌ 24-hour no-load operation monitoring (temperature rise & oil level).

220kV 31500kVA Oil Immersed Power Transformer

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Why choose us?

GNEE Group:

Global Transformer Supply Chain Integration Expert (2008 - Present)

Founded in 2008, GNEE Group has undergone fifteen years of deep industry cultivation, successfully transforming from a regional trader to a global supply chain management expert. As a pioneer in the integration of the steel industry chain, the group has established a full-cycle value system that spans raw material procurement, production coordination, logistics optimization, and terminal services, setting an innovative operational benchmark in the global transformer distribution sector. In the era of Industry 4.0, GNEE Group is accelerating towards its goal of becoming a global integrator oftransformer industry value through digital restructuring and green supply chain construction.

220kV 31500kVA Oil Immersed Power Transformer

SGS certification certificate

220kV 31500kVA Oil Immersed Power Transformer

Our factory

220kV 31500kVA Oil Immersed Power Transformer

FAQ

Q: Why is the oil-filled design critical for distribution transformers?

A: Oil filled distribution transformers use oil to cool windings efficiently, preventing overheating. This ensures stable power output under heavy loads while minimizing maintenance needs.

Q: What makes the oil immersed type transformer energy-efficient?

A: Our oil immersed type transformer combines high-grade silicon steel cores with optimized windings, reducing both no-load and load losses by up to 30%. This lowers operational costs over time.

Q: How does a three-phase oil immersed transformer benefit industrial projects?

A: The three phase oil immersed transformer supports balanced power distribution for large-scale equipment, ensuring consistent performance in factories or power substations.

Q: What is the difference between an "immersed transformer" and a standard dry-type transformer?

A: An immersed transformer uses oil for insulation and cooling, making it safer for high-voltage applications. Dry types lack oil but may require forced cooling, making them less efficient in harsh conditions.

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