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800-31500KVA 35KV Oil-immersed Power Transformer

800-31500KVA 35KV Oil-immersed Power Transformer2

800-31500KVA 35KV Oil-immersed Power Transformer3

800-31500KVA 35KV Oil-immersed Power Transformer

Name: China 800-31500KVA 35KV Oil-immersed Power Transformer Manufacturers Suppliers Factory - GNEE Electric
Brand: GNEE Electric
SKU: 266873423

‌Product Name:‌ 800-31500KVA 35KV Three-phase Oil-immersed Power Transformer
‌Delivery Year:‌ 2022
‌Country:‌ Kenya
‌Application Scenario:‌ Connecting remote substations to wind farms for clean energy grid integration.
‌Key Advantages:‌ High voltage fluctuation adaptability, optimized short-circuit impedance design, and enhanced grid stability.

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Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of 800-31500kva 35kv oil-immersed power transformer in China. If you're going to buy customized 800-31500kva 35kv oil-immersed power transformer made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.

Product Overview of Oil-immersed Power Transformer‌

This ‌800-31500KVA 35KV Three-phase Oil-immersed Power Transformer‌ is a core device designed for medium-to-high voltage power transmission, ideal for substations, industrial plants, data centers, and similar applications. Its critical components include high-permeability cold-rolled silicon steel sheets, high-temperature-resistant insulation materials, and premium electrolytic copper windings, ensuring exceptional efficiency and extended service life. As a flagship model of ‌oil filled power transformers‌, it achieves a voltage conversion efficiency of up to ‌98.5%‌, surpassing IEC international standards. By immersing key components in insulating oil, ‌this oil-immersed transformer‌ effectively dissipates heat and suppresses partial discharges, significantly enhancing operational safety.

Products parameter

High Voltage:35(33,38.5)KV Connection Symbol:Yd11 or YNd11 Rated Frequency:50Hz/60Hz Low Voltage:10(3.15,6.3,10.5,11)KV Tapping Range of HV:±2x2.5% Insulation Level:LI200 AC85/LI75 AC35
Rated power (KVA)	Short-Circuit Impedance(%)	S22 (KW)		S20 (KW)		S11/13/18 (KW)		No-Load Current (%)	Sound pressure dB(A)	Weight (kg)	Overall Dimension(mm)
		No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss				L	W	H
		No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss				L	W	H
800	6.5	0.57	6.8	0.64	6.8	0.72	8.6	0.80	62	4000	2150	1380	2420
1000		0.67	8.4	0.75	8.4	0.84	10.5	0.70	62	4500	2210	1480	2500
1250		0.82	10.1	0.92	10.1	1.02	12.6	0.60	65	4900	2470	1550	2600
1600		0.99	12.1	1.11	12.1	1.23	15.1	0.50	65	6000	2600	1620	2700
2000		1.27	13.3	1.43	13.3	1.59	16.6	0.50	65	6600	2780	1850	2790
2500		1.49	14.6	1.68	14.6	1.86	17.8	0.50	67	7600	2830	2000	2860
3150	7.0	1.55	18.8	1.82	18.8	2.18	19.9	0.45	70	8400	2890	2340	3130
4000		1.82	22.4	2.09	22.4	2.64	23.5	0.45	72	9600	2950	2780	3210
5000		2.18	25.6	2.55	25.6	3.18	27.0	0.45	74	10900	3000	3050	3230
6300	8.0	2.64	28.6	3.09	28.6	3.82	30.3	0.45	74	12600	3190	3200	3250
8000		3.64	31.5	4.27	31.5	5.27	33.2	0.40	76	15700	3250	3280	3600
10000		4.36	37.1	5.18	37.1	6.36	39.1	0.40	76	19500	3270	3460	3610
12500		5.00	44.0	5.91	44.0	7.27	46.5	0.35	78	20600	3290	3680	3640
16000		6.09	53.8	7.18	53.8	8.82	56.8	0.35	80	26300	3350	3960	4100
20000		7.18	65.1	8.55	65.1	10.45	68.6	0.35	80	31500	3460	3980	4150
25000	10.0	8.55	76.9	10.09	76.9	12.36	81.2	0.30	83	33500	4000	3640	4370
31500	10.0	10.09	91.6	11.91	91.6	14.73	96.7	0.30	83	40100	3890	4420	4510
Note: The above parameters are only for designing and selecting reference, and the final parameters are subject to the actual product.

High Voltage:35(33,38.5)KV Connection Symbol:Yd11 or YNd11 Rated Frequency:50Hz/60Hz Low Voltage:10(3.15,6.3,10.5,11)KV Tapping Range of HV:±4x2.5% Insulation Level:LI200 AC85/LI75 AC35
Rated power (KVA)	Short-Circuit Impedance(%)	SZ22 (KW)		SZ20 (KW)		SZ11/13/18 (KW)		No-Load Current (%)	Sound pressure dB(A)	Weight (kg)	Overall Dimension(mm)
		No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss				L	W	H
		No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss	No-Load Loss	On-Load Loss				L	W	H
2000	6.5	1.34	13.9	1.51	13.9	1.68	17.6	0.50	65	6780	2680	1500	3030
2500	6.5	1.59	15.2	1.78	15.2	1.98	20.2	0.50	67	8100	2710	2000	3160
3150	7.0	1.64	20.2	1.91	20.2	2.36	21.4	0.45	70	8400	3640	2590	2540
4000		1.91	23.8	2.27	23.8	2.82	25.1	0.45	72	10300	3690	2860	2570
5000		2.36	28.0	2.73	28.0	3.36	29.5	0.40	72	10900	3750	2950	2880
6300	7.5	2.82	30.0	3.36	30.0	4.09	31.7	0.40	74	14600	4070	2910	2910
8000		3.91	33.2	4.64	33.2	5.73	35.1	0.40	74	17800	4410	3470	2920
10000		4.64	39.3	5.45	39.3	6.73	41.5	0.40	76	20900	3250	3460	4250
12500	8.0	5.46	46.5	6.45	46.5	7.91	49.1	0.35	76	22300	3400	3690	4550
16000		6.55	57.5	7.73	57.5	9.55	60.7	0.35	78	27200	3640	3890	4600
20000		7.73	67.6	9.18	67.6	11.27	71.5	0.30	80	32500	3770	4090	4700
25000	10.0	9.18	80.0	10.82	80.0	13.27	84.5	0.30	82	39200	3930	4200	5130
31500	10.0	10.91	94.9	12.91	94.9	15.82	100.2	0.30	84	43300	4210	4450	5530
Note: The above parameters are only for designing and selecting reference, and the final parameters are subject to the actual product.

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Core Advantages of Three-phase Oil-immersed Power Transformer‌

‌Energy Efficiency:‌
Leveraging the ‌Three-phase oil filled power transformers's proprietary magnetic circuit optimization, no-load losses are reduced by ‌20%‌ and load losses by ‌15%‌, supporting enterprises in achieving green energy goals.

‌Environmental Resilience:‌
Tested under extreme temperatures (-30°C to +50°C), ‌this transformer‌ operates reliably in high-altitude, dusty, and coastal humid environments, making it ideal for upgrading power infrastructure in developing countries.

‌Renewable Compatibility:‌
Directly compatible with grid-tied inverters, ‌the oil-immersed transformer‌ seamlessly integrates with solar, wind, and other renewable energy systems, driving global energy transition efforts.

Detailed photos

product-980-322

Key Parameters of Oil filled power transformers

‌Rated Capacity:‌ 800KVA to 31,500KVA, meeting demands from small industries to large-scale power grids.

‌Voltage Configuration:‌ Primary side 35KV/10KV, secondary side 0.4KV, with multi-stage voltage regulation.

‌Short-circuit Impedance:‌ 7%-10.5%, ensuring safe fault interruption during grid disturbances.

Structural Design

‌Core Components:‌

‌Iron Core:‌ Adopts step-laminated silicon steel sheets to minimize eddy current losses.

‌Windings:‌ Segmented copper coils enhance mechanical strength and electrical insulation.

‌Tank System:‌
The ‌oil-immersed transformer‌ features a corrugated sealing structure to accommodate oil expansion/contraction, eliminating leakage risks.

‌Cooling Mechanism:‌
Equipped with radiators and an oil circulation system, ensuring stable operation even under 150% overload conditions.

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Why choose us?

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GNEE group

GNEE strictly follows the comprehensive acceptance testing process to ensure that the performance of each device meets the standards. Our products and services have been successfully applied in more than 50 countries and regions around the world. As a trusted global industrial partner, we are always committed to helping customers achieve their sustainable development vision through high-quality products and full-process services.

Our factory

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Packing and Delivery

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FAQ

Q: What Are the Core Competitive Advantages of Your Company?

A: Experience and Scale: Since its establishment in 2008, our company has been focusing on the transformer field for 18 years. We have delivered over 50,000 units of equipment and served more than 2,000 customers globally.
R&D and Production: A team of 200 professionals with a 20,000㎡ modern production base covering three major locations in China: Shijiazhuang, Xingtai, and Anyang. This ensures full autonomy from raw materials to finished products.
Customization Capability: Supports the design of transformers ranging from 50kVA to 5000kVA. Customized solutions can be provided for special scenarios such as high altitude or extreme temperatures.

Q: How Do You Ensure Delivery Time and Quality?

A: Supply Chain Assurance: Leveraging the industrial cluster advantages of three factories, we maintain sufficient raw material inventory, enabling faster order response compared to the industry average by 30%.
Quality Control System: From the precision of core stacking (±0.5mm) to 200 inspection items before product delivery, we ensure that each device complies with international standards such as CE and IEC.

Q: What Is the Delivery Cycle for Standard Products? Will Custom Products Affect Delivery Time?

A: Standard Products: The typical delivery cycle is 15-30 working days (starting from the signing of the contract and receipt of the advance payment).
Custom Products: Delivery cycles may extend depending on specific requirements, usually requiring 30-60 working days. If special materials, non-standard designs, or international transportation are involved, the specific time will be negotiated between both parties.

Q: Does Your Company's Transformers Meet International Standards?

A: Certifications: Passed certifications including IEC 60076 (International Standard), GB/T 6451 (Chinese National Standard), SGS, CE, UL, etc.
Special Certifications: Non-crystalline alloy transformers meet the IEC 61786 (high-efficiency transformer) standard; pre-assembled substations comply with the IEC 62271-200 (pre-assembled substation) requirement.

Q: How to Choose the Appropriate Type of Transformer?

A: Energy Efficiency Priority: Select amorphous alloy or epoxy resin dry-type transformers.
High Load Scenarios: Oil-immersed transformers are preferable.
Complex Distribution Needs: Contact engineers to customize pre-assembled substation solutions.

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