Name: China Three Phase Two Winding OLTC Power Transformer Manufacturers Suppliers Factory - Transpower
Brand: Trans
SKU: 246751834

Transpower Electrical Equipment Co., Ltd. is one of the most reliable manufacturers and suppliers of three phase two winding oltc power transformer in China. Welcome to buy high quality customized products at competitive price from our factory. Contact us for quotation.

Three Phase Two Winding Oltc Power Transformer

Three Phase Two Winding OLTC Power Transformer is a three-phase, two-winding transformer designed by TRANSpower Electrical and specially equipped with load tap changer (OLTC) for precise voltage regulation. Our company is committed to manufacturing transformers that meet international standards such as IEC, ANSI and CSA to ensure superior performance in various application scenarios. With a capacity range from 35kV to 330kV, this transformer is suitable for power systems that require precise voltage control.

Products Description

The transformer has a three-phase, two-winding construction incorporating a load tap-changer that enables the voltage to be adjusted during operation to cope with load variations. The materials selected include highly conductive copper wire and high quality silicon steel sheets to ensure efficient electromagnetic conversion. The transformer's insulation system is made of high temperature and high voltage materials and is treated by a vacuum impregnation process to enhance overall reliability.

The Three Phase Two Winding OLTC Power Transformer provides precise voltage regulation to ensure stable power system operation under varying load conditions. Its load tap-changer function makes voltage regulation flexible and reduces system fluctuations. Strong short-circuit and overload capabilities enhance reliability and reduce operation and maintenance costs.

This transformer is mainly used in power systems that require precise voltage regulation, such as electric utilities, large industrial facilities and important commercial buildings. It is particularly suitable for use where frequent voltage adjustments are required to ensure a stable and efficient power system.

Three phase two winding OLTC power transformer

Industry-specific attributes
Product	Three phase two winding OLTC power transformer
Phase	Three phase
Coil Structure	Toroidal
Coil Number	Double winding or Triple winding
Other attributes
Place of Origin	Zhejiang, China
Model Number	Three phase two winding OLTC power transformer (As per customer requirements)
Rated capacity	From 6300kva to 180mva
High Voltage	From 33kV to 220kV
Medium Voltage	36/37/38.5/66/69/115/121kV
Low Voltage	From 6.3kV to 69kV
Frequency	50/60Hz
Standard	IEC, ANSI, IEEE, CSA
Vector group	Yd11, YNd11, YNyn0d11, YNa0d11
Material	Aluminum/Copper
Application	Power plant (station), substation (power distribution stations), Urban power grids, Industrial facilities, Large-scale infrastructure projects
Type	Oil-immersed Transformer
Feature	Low Loss

product-778-644

Three phase two winding OLTC power transformer parameters

The following table lists the standard parameters for the 220kV Three phase two winding OLTC power transformer. If you require other capacities and voltage levels, please contact TRANSpower for accurate technical specifications and customized offers.

Below Specs Are ONLY For Reference.

CAPACITY (kVA)	Voltage ratio and tap range (kV)		Connection Symbol	No-load loss (kW)	Full-load loss (kW)	Impedance (%)	No-load current
CAPACITY (kVA)	HV	LV	Connection Symbol	No-load loss (kW)	Full-load loss (kW)	Impedance (%)	No-load current
31500	220±8x1.25%	66.3; 6.6 10.5; 11 35; 37; 38.5	YNd11	38	135	12~14	0.70
40000				45	157		0.63
50000				54	189		0.56
63000				63	220		0.56
90000		10.5; 11 35; 37; 38.5		80	288		0.49
120000				99	346		0.49
150000				116	405		0.42
180000				135	468		0.42
120000		66 69		102	355		0.49
150000				120	415		0.42
180000				140	475		0.42

product-1033-729

10MVA 33kV Three Phase two winding OLTC power transformer dimensions and weight details

product-967-722

Frequently asked questions (FAQ)

Q: What is two winding and three winding transformer?

A: Single-phase double-winding transformers are engineered with two distinct windings, which operate independently within a single-phase system. In contrast, single-phase three-winding transformers incorporate three separate windings, all functioning collectively within the same single-phase framework. Regarding three-phase double-winding transformers, these devices contain a total of six windings, with each phase supported by two individual winding configurations.

Q: What is the difference between auto transformer and two winding transformer?

A: An autotransformer is a transformer with only one winding, one part of which serves as the primary and the other as the secondary. A double-winding transformer is a static machine that transfers electrical energy from one end to the other without changing the frequency.

Q: What is the difference between OLTC and Octc?

A: Tap changes during power failures: OCTC transformers require temporary power interruptions to adjust the taps and are therefore suitable for less dynamic networks. Reduced complexity: OCTC transformers are often simpler to design than OLTC transformers, making them cost-effective for specific applications.

Q: What is the working principle of OLTC?

A: Power transformers with on-load tap-changers (OLTCs) have been a major component of power grids and industrial applications for almost 90 years. OLTCs enable voltage regulation and/or phase shifting by changing the transformer ratio uninterruptedly under load.

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