35kV Oil Immersed Power Transformer - 50 to 1600 kVA

Our S13 35kV Oil Immersed Transformer, covering models from 50 to 1600 kVA, is a mature product developed through extensive experience and practical application. Its technology, performance, and structure have reached a stable level, leading to its widespread use within power grid systems.

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Description
Parameter

In terms of design and structure, our S13 35kV oil-immersed transformers incorporate several key optimizations. The low-voltage windings are preferably made of copper foil, while the high-voltage coils feature a multi-layer cylindrical structure. To enhance heat dissipation and ensure lower hot spot temperature rise, we strategically design axial oil channels as needed, concurrently maintaining balanced ampere-turn distribution between the high and low voltage windings.

Regarding performance and reliability, this product exhibits high mechanical strength and robust short-circuit withstand capability. To ensure stability during transportation and reliable operation on-site, both the iron core and windings are secured with independent fastening measures. Self-locking anti-loosening nuts are utilized for fasteners, allowing the transformer to withstand bumps during transport and ensuring reliable operation upon arrival without requiring a core lifting inspection.

For maintenance and service life, we employ advanced vapor-phase drying and vacuum oil injection processes for the transformer body, ensuring thorough insulation drying and minimal air bubble content in the oil. The oil conservator is equipped with a capsule, which completely isolates the transformer oil from the atmosphere. This critical feature effectively prevents oil degradation and moisture ingress, significantly extending the transformer's maintenance cycle and substantially reducing overall maintenance costs.

Reference standard
GB 1094.1~2《general provisions of power transformers》

《temperature length of oil-immersed transformer》

GB 1094.3 《insulation level, Insulation test and external insulation air gap》

GB 1094.5 《capacity of electrical transformers to withstand short circuits》

GB/T 6451 《technical parameters and requirements of oil-immersed power transformer》

GB/T 15164 《load guide for oil-immersed power transformers》

GB2536 《transformer oil》

Rated capacity (KVA)	Voltage combination and tap range			Connection symbol	No-load loss(W)	Load loss(W)	No-load current (%)	Short circuit impedance (%)
Rated capacity (KVA)	High voltage (KV)	High voltage tap range(%)	Low voltage (KV)	Connection symbol	No-load loss(W)	Load loss(W)	No-load current (%)	Short circuit impedance (%)
50	35 38.5	±5% ±2×2.5%	0.4	Dyn11 Yyn0	130	1200/1140	1.3	6.5
100					185	2010/1910	1.1	6.5
125					215	2370/2260	1.1	6.5
160					225	2820/2680	1	6.5
200					270	3320/3160	1	6.5
250					320	3950/3760	0.95	6.5
315					385	4750/4530	0.95	6.5
400					465	5740/5470	0.85	6.5
500					545	6910/6580	0.85	6.5
630					665	7860	0.65	6.5
800					785	9400	0.65	6.5
1000					920	11500	0.65	6.5
1250					1120	13900	0.6	6.5
1600					1350	16600	0.6	6.5

1: According to user requirements, transformers with a high-voltage tap range of±2*2.5%can be provided.
2: The performance parameters of products with other capacities can be determined through consultation between the user and the manufacturer.