Product Introduction

Three Phase 2 Winding OLTC Power Transformer is an efficient power conversion equipment with integrated on-load voltage regulation function.
The product adopts an optimized combination design of dual-winding structure and on-load tap switch (OLTC), with high operating reliability and accurate voltage regulation accuracy.
The OLTC on-line monitoring unit equipped with it can collect the operating status data of the tap switch in real time, and cooperate with the insulation oil circulation filter to ensure the stable performance of the insulating oil, greatly reduce equipment operation and maintenance costs, and widely adapt to various medium and high voltage distribution engineering scenarios.

Product Features

Accurate on-load voltage regulation: equipped with a high-quality OLTC on-load tap switch, it can realize stepless voltage regulation under load, with a wide voltage regulation range and fast response speed, and can compensate for the voltage deviation of the power grid in real time to ensure that the output voltage is stable within the rated range to meet the power needs of precision equipment.

High-efficiency and energy-saving design: the use of low-loss oriented silicon steel sheet iron core and oxygen-free copper winding, treated by vacuum dip paint process, effectively reduces no-load loss and load loss, and the energy conversion efficiency reaches the first level of the national standard; at the same time, optimize the winding arrangement and core structure, reduce hysteresis loss and eddy current loss, long-term operation can significantly save power.

Three Phase 2 Winding OLTC Power Transformer advantage

Our Certification

1. ISO International Certification

We are ISO certified, and our entire process-from raw material selection to production and final inspection-adheres to international standards. This ensures the safety and durability of every transformer, helping customers reduce long-term maintenance costs and minimize potential safety risks.

2. CE Certification
Our transformers are CE certified and meet EU requirements. They can be directly exported to and used in all 27 EU member countries, reducing import and export costs and allowing customers to put the products into operation more quickly.

3. Type Test Report
Our transformers have successfully passed type tests conducted by authoritative institutions and are supported by complete test reports. They fully meet the requirements for smooth installation and acceptance in power grid and industrial projects.

Three Phase 2 Winding OLTC Power Transformer certification

FAQ

Q：How does an OLTC work?
A：An on-load tap changer (OLTC) automatically adjusts the transformer's taps to maintain a stable output voltage, preventing equipment damage caused by excessively high or low voltages.
Q：What industries are these transformers suitable for?
A：Three-Phase 2 Winding OLTC Power Transformers are widely used in power engineering, urban and rural power grid reconstruction, transportation, and communications.
Q： What is the service life of this transformer?
A： Three-phase, two-winding power transformers with OLTC can operate for over 30 to 50 years. Their long-term stability and durability are ensured by high-quality materials and strict manufacturing standards.
Q：What voltage levels are supported by our products?
A： Common rated voltages include 11kV, 33kV, 66kV, and 110kV. Customization is possible based on customer design requirements.

Low Losses Three Phase 2 Winding OLTC Power Transformer

Product Specifications

Model Number	Rated Volume Quantity (KVA)	Voltage Combination(KV)			Connection Group Label	No-load Loss (W)	Load Loss (W)	No-load Electricity (%)	Short Circuit Resistance (%)
Model Number	Rated Volume Quantity (KVA)	High Voltage	High Voltage Tap Range	Low Voltage	Connection Group Label	No-load Loss (W)	Load Loss (W)	No-load Electricity (%)	Short Circuit Resistance (%)
S22-630	630	35	±5% or ±2×2.5%	3.15 6.3 10.5	yd11	470	5660	0.65	6.5
S22-800	800					560	6770	0.65	6.5
S22-1000	1000					660	8280	0.65	6.5
S22-1250	1250					790	10010	0.55	6.5
S22-1600	1600					950	11950	0.45	6.5
S22-2000	2000					1230	13180	0.45	6.5
S22-2500	2500					1450	14110	0.45	6.5
S22-3150	3150	35 38.5	±5% or ±2×2.5%	3.15 6.3 10.5		1730	16560	0.45	7
S22-4000	4000					2050	19660	0.45	7
S22-5000	5000					2450	22540	0.45	7
S22-6300	6300					2970	25200	0.45	8
S22-8000	8000	35 38.5	±5% or ±2×2.5%	3.15 3.3 6.3 6.6 10.5	ynd11	4090	27650	0.35	8
S22-10000	10000					4930	32620	0.35	8
S22-12500	12500					5670	38740	0.30	8
S22-16000	16000					6860	47380	0.30	8
S22-20000	20000					8160	57240	0.30	8
S22-25000	25000					9640	67680	0.25	10
S22-31500	31500					11460	80640	0.25	10