Oil Filled Distribution Transformer Core

oil-filled distribution transformer core Product Description

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oil-filled distribution transformer core Functions and Roles

• Magnetic Field Conduction: As the magnetic circuit channel of the transformer, the core guides the alternating magnetic field generated by the current in the primary winding. This allows the secondary winding to induce voltage, completing the voltage transformation and transmission of electrical energy.

 

• Loss Reduction: By optimizing materials and structure, it minimizes hysteresis loss and eddy current loss. These two types of losses are directly converted into heat, which affects the transformer's efficiency.

 

• Winding Support: Serving as the internal framework of the transformer, the core fixes and supports the high-voltage and low-voltage windings. It ensures the insulation distance between the windings and the core, as well as between the windings themselves, to guarantee safe operation.

 

Commonly used core materials mainly include the following:

1.Silicon Steel Laminations

Silicon steel is the most commonly used material for distribution transformer cores because of its good permeability and low hysteresis losses. The addition of silicon can reduce the iron loss and improve the efficiency of the transformer.

 

2.High permeability silicon steel:

On the basis of traditional silicon steel, this material further improves the permeability and reduces the energy loss, and is especially suitable for high-efficiency transformers.

 

3.Amorphous alloys:

Amorphous alloy is a new material, it has no crystal structure, so it has lower hysteresis loss and eddy current loss, making the transformer using this material more energy-saving. However, the cost of amorphous alloy materials is high, and the processing is difficult.

 

4.Nanocrystalline alloys:

Nanocrystalline materials combine the advantages of amorphous materials with superior mechanical properties, providing very low losses and high saturation magnetic induction, which is suitable for high-performance distribution transformers.

 

5.Grain-Oriented Electrical Steel:

Grain oriented electrical steel is a kind of advanced material specially used for power transformer core. Its crystal structure has been specially treated to arrange in one direction, which significantly reduces the energy required for magnetization and improves efficiency.

 

5.Non-Grain-Oriented Electrical Steel:

Compared with oriented electrical steel, the crystal structure of non-oriented electrical steel is not unidirectionally aligned, but it can still provide good magnetic properties and is suitable for applications requiring multi-directional magnetization.

 

Oil Filled Distribution Transformer Core specifications

Type	Grade	Thickness (mm)	Density (kg/dm³)	Max.Core loss(W/kg)		Min. Induction (T)	Min. Lamination in factor
				P17/50	P17/60
Conventional type	C23Q110	0.23	7.65	1.10	1.45	1.82	0.945
	C23Q120			1.20	1.57	1.82
	C27Q120	0.27		1.20	1.58	1.82	0.950
	C27Q130			1.30	1.68	1.82
	C30Q120	0.30		1.20	1.58	1.82	0.955
	C30Q130			1.30	1.71	1.82
High induction type	C23QG085	0.23	7.65	0.85	1.12	1.88	0.945
	C23QG090			0.90	1.19	1.88
	C23QG095			0.95	1.25	1.88
	C23QG100			1.00	1.32	1.88
	C27QG090	0.27		0.90	1.19	1.88	0.950
	C27QG095			0.95	1.25	1.88
	C27QG100			1.00	1.32	1.88
	C27QG110			1.10	1.45	1.88
	C30QG105	0.30		1.05	1.38	1.88	0.955
	C30QG110			1.10	1.46	1.88
	C30QG120			1.20	1.58	1.88
Domain refined high induction type	C23QH080	0.23	7.65	0.80	1.06	1.88	0.945
	C23QH085			0.85	1.12	1.88
	C23QH090			0.90	1.19	1.88
	C23QH100			1.00	1.32	1.88
	C27QH085	0.27		0.85	1.12	1.88	0.950
	C27QH090			0.90	1.19	1.88
	C27QH095			0.95	1.25	1.88
	C27QH100			1.00	1.32	1.88
	C30QH095	0.30		0.95	1.25	1.88	0.955
	C30QH100			1.00	1.32	1.88
	C30QH110			1.10	1.46	1.88