S Series 10kV/20kV Oil-immersed Transformer

Product Overview

The S Series 10kV/20kV Oil-immersed Transformer transforms grid voltage into the voltage required by a system or load, enabling the transmission and distribution of electric energy. The S(B)H-M series amorphous alloy oil-immersed transformer is a new energy-saving technology power distribution equipment. Its energy-saving effect mainly comes from the use of a new type of iron-based amorphous alloy material with excellent soft magnetic properties.

The product conforms to the national standard GB1094 “Power Transformer” and GB/T25446-2010 “Technical Parameters and Requirements for Oil-immersed Amorphous Alloy Core Distribution Transformers”.

Key Features

• Amorphous alloy core: Amorphous alloy is a new type of strip material without a crystal structure; it has low magnetization power and high resistivity, resulting in low eddy current loss.
• Lower no-load loss: Using this material as the iron core produces a new type of energy-saving transformer whose no-load loss is more than 75% lower than that of the current S11 distribution transformer.
• Core structure: Rolled iron core structure, three-phase five-column type, with a rectangular cross section.
• Rectangular coil: The high voltage is wound with acetal enameled wire, and the low voltage is wound with flat wire or copper foil, which increases the transformer’s ability to withstand short circuit.
• Dyn11 connection group: Avoids the influence of high harmonics, has strong resistance to unbalanced load, and significantly improves the quality of power supply.
• Vacuum oil filling: Completely eliminates air bubbles in the coil and ensures stable insulation performance.
• Sealed cooling design: The oil storage tank is canceled, and the oil pipe is replaced by a corrugated or chip radiator as the cooling component. The oil tank is equipped with an air-filled cushion that can compress with the volume expansion of the transformer oil. The transformer oil is isolated from the atmosphere, preventing and slowing down the deterioration of oil quality and insulation, enhancing operation reliability, and allowing normal maintenance-free operation.

Applications

The transformer converts grid voltage into the voltage required by the system or load to realize the transmission and distribution of electric energy. As a new energy-saving technology power distribution equipment, the S(B)H-M series amorphous alloy oil-immersed transformer is suited to distribution applications where voltage transformation and energy-efficient operation are required.

Technical Specifications

Why Choose This Product?

• Amorphous alloy core technology delivers no-load loss more than 75% lower than the current S11 distribution transformer.
• Dyn11 connection group resists high harmonics and unbalanced loads while improving power supply quality.
• Vacuum oil filling ensures stable insulation performance by eliminating air bubbles in the coil.
• Sealed oil tank design isolates transformer oil from the atmosphere, slowing oil and insulation deterioration and supporting normal maintenance-free operation.
• Rectangular coil with acetal enameled wire and flat wire or copper foil windings increases short-circuit withstand capability.
• Conforms to GB1094 and GB/T25446-2010.

Manufacturer Recommendation

Henan Di Te Li Electric Co., Ltd manufactures this S Series 10kV/20kV oil-immersed transformer. The product is built to the national standard GB1094 “Power Transformer” and GB/T25446-2010 “Technical Parameters and Requirements for Oil-immersed Amorphous Alloy Core Distribution Transformers”, giving buyers a documented standards basis for specification review and procurement.

Sourcing Guide (FAQ)

What is the voltage class of this transformer?

The S Series oil-immersed transformer is offered in 10kV/20kV voltage class.

What standards does this transformer conform to?

The product conforms to the national standard GB1094 “Power Transformer” and GB/T25446-2010 “Technical Parameters and Requirements for Oil-immersed Amorphous Alloy Core Distribution Transformers”.

How much lower is the no-load loss compared with the S11 distribution transformer?

No-load loss is more than 75% lower than that of the current S11 distribution transformer.

What connection group does the transformer use?

The transformer connection group adopts Dyn11, which avoids the influence of high harmonics, has strong resistance to unbalanced load, and significantly improves the quality of power supply.

How is the oil insulation kept stable?

The transformer adopts vacuum oil filling, which completely eliminates air bubbles in the coil and ensures stable insulation performance. The oil storage tank is canceled, and the oil tank is equipped with an air-filled cushion so transformer oil is isolated from the atmosphere, preventing and slowing deterioration of oil quality and insulation.

Summary

The S Series 10kV/20kV Oil-immersed Transformer combines an iron-based amorphous alloy core with a Dyn11 connection group and vacuum oil filling to support energy-efficient voltage transformation and reliable power distribution. With no-load loss more than 75% lower than the current S11 distribution transformer, it is a practical choice for distribution systems requiring stable insulation, harmonic resistance and maintenance-free operation.