35kv Low-Loss and on-Load Regulation Transformer

The 35kV Low-Loss and on-Load Regulation Transformer is a medium-voltage power transformer designed for stable voltage control in distribution and substation systems. It integrates an on-load tap changer (OLTC) that allows voltage adjustment while the transformer is operating, ensuring continuous power supply without interruption. Lugao Power Co., Ltd. manufactures high-quality transformers using premium silicon steel cores, reliable windings, and insulating transformer oil to achieve low energy loss, high efficiency, and long service life. These transformers are widely used in power plants, substations, and industrial power distribution networks.

Parameter

Capacit y	GB/20052-2020			impedance voltage (%)	no-load current (%)	Vector Group	Exten d Conne ction
	(S13)
	no-load loss	load loss
		Dyn11/Yzn1 1	Yyno
30	65	455	430	4.0	0.5	Yyn0 OR Dyn11	±2*2. 5% OR±5 %
50	80	655	625		0.5
63	90	785	745		0.5
80	105	945	900		0.45
100	120	1140	1080		0.45
125	135	1360	1295		0.45
160	160	1665	1585		0.4
200	190	1970	1870		0.4
250	230	2300	2195		0.4
315	270	2760	2630		0.35
400	330	3250	3095		0.35
500	385	3900	3710		0.3
630	460	4460		4.5	0.25
800	560	5400			0.18
1000	665	7415			0.17
1250	780	8640			0.17
1600	940	10440			0.16
2000	1085	13180		5.0	0.16
2500	1280	13360			0.16

How does a 35kV Low-Loss and on-Load Regulation Transformer work?

The 35kV Low-Loss and on-Load Regulation Transformer operates based on electromagnetic induction while integrating an OLTC system to adjust voltage levels during operation.

Working Principle

• Electrical energy is transferred between windings through electromagnetic induction.
• The OLTC mechanism changes the transformer tap position without interrupting the power supply.
• Transformer oil circulates inside the tank to dissipate heat and provide insulation.
• The radiator releases heat into the surrounding air to maintain safe operating temperature.

Main Application Scenarios

The 35kV Low-Loss and on-Load Regulation Transformer is widely used in medium-voltage power systems where stable voltage and reliable power supply are critical.

• Power generation plants
• Electrical substations
• Industrial power distribution systems
• Urban power grids
• Mining and heavy industry
• Renewable energy grid connections

Advantages of On Load Tap Changer Transformer

• Continuous voltage regulation without interrupting the power supply.
• Improved grid stability for fluctuating load conditions.
• Lower energy loss due to optimized transformer design.
• Longer service life with high-quality insulation and oil cooling.
• Reliable performance in complex power distribution networks.

Difference Between OLTC and Off Load Tap Changer

Feature	OLTC Transformer	Off Load Tap Changer
Voltage adjustment	Adjustable during operation	Requires shutdown
Power supply interruption	No interruption	Power must be disconnected
Application	Large grids, substations	Small or stable load systems
Operational flexibility	High	Limited

Why Use a 35kV Low-Loss and on-Load Regulation Transformer?

• Maintain stable voltage output in fluctuating load environments.
• Reduce energy losses and operating costs.
• Improve power system reliability and efficiency.
• Suitable for modern smart grid and industrial power systems.
• Ensure uninterrupted power supply during voltage adjustments.

Maintenance of OLTC Power Transformer

• Regularly check transformer oil level and oil quality.
• Inspect OLTC mechanism for smooth switching operation.
• Monitor operating temperature and load conditions.
• Ensure the radiator and cooling system remain unobstructed.
• Conduct periodic insulation and electrical testing.

Why Choose Lugao?

• Professional 35kv Low-Loss and on-Load Regulation Transformer manufacturer with years of industry experience.
• High-quality raw materials including silicon steel sheets and premium windings.
• Low-loss and energy-efficient design to reduce operating costs.
• Strict international testing standards ensuring reliable performance.
• Fast delivery with minimum order of one unit.
• Professional technical support and after-sales service.
• Products exported to Central Asia, Africa, and other global markets.

FAQ

What is the typical service life of a 35kV Low-Loss and on-Load Regulation Transformer?

With proper maintenance, the transformer can operate reliably for more than 25 years.

What cooling method is used?

The transformer uses oil-immersed cooling. Transformer oil transfers heat from the windings and core to the radiator for effective heat dissipation.

Can the voltage be adjusted during operation?

Yes. The OLTC system allows voltage adjustment without interrupting the power supply.

What industries commonly use this transformer?

Power utilities, substations, heavy industries, mining operations, and renewable energy projects commonly use the 35kV Low-Loss and on-Load Regulation Transformer.

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