Medium voltage transformers

Largely reduce non-load losses by adopting amorphous or high quality silicon steel core, LV winding has stronger resistance to short circuit, Low noise solution

Low noise solution

Efficient transformers with reduced losses

High frequency-low losses

Environmental friendly

Manintance free

Reliability

Customized design

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Our product advantages

Iron core

The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel lamination insulated on both sides, guaranteeing low losses and low noise. These values are even improved by laser treatment. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise.
The Tank

The transformer is fully sealed, which ensures the stability of oil quality, extends the service life, maintenance. At the same time, the tank composed of corrugated radiator adopts phosphating and multi-layer anti-rust spraying technology to produce, which has good weather resistance.
winding

The windings are made of oxygen-free copper , so the load loss of is lower and the electric performance is better.
insulation bushing

Insulated ceramic bushing, excellent insulation capability, effective in preventing breakdown

Related product parameters

Main Specifications
Transformer type	Oil-immered type
Phases	Thres phases or single phases
Capacity	30 - 31500kva (customization is available)
Voltage	up to 36kv
Frequency	50/60HZ
Oil preservation	Hermetically Sealed/ Conservator/ Free Breathing
Tap changer	off-load or on-load
Winding material	Aluminum/ copper
Coolers	corrugated wall or radiator
Cooling mode	ONAN /ONAF
Dielectric liquid	Mineral oil / Dimethyl Silicone/ Vegetable Oil
Impedance	4% to 8%
Losses	according to customers requirements
Vector groups	Dyn11, Yyn11 (according to customers requiements)

Factory Advantages

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Personalized customization

Only Focused on transformers, but we offer customized different types of transformers.
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+20 years experience

+20 years experience R&D team, derived from a 60 years history transformer factory in Changsha city of China.
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Drew up the National Standard for Mining Explosion-proof Substation

GB8286 (Mining explosion-proof Mobile Substations)the product of National standard that origin and inheritor，Unique designing for customers' convenience,like “Vertically Lifting”

Applications

Varelen offers a complete range of power and distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial,and commercial applications. Our oil-immersed transformers are manufactured in accordance with the most demanding industry and international standards. Transformers can be used for indoor or outdoor applications and can be provided with off-load and on-load tap changers.