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Elprom Trafo. Address: Kyustendil, Bulgaria, Dondukov Str. The factory was established in year under the name “Elprom Trafo” with its main activity being manufacturing of MV/LV Distribution Transformers. Elprom Trafo CH is company for Electrical Equipment in Kyustendil. Informaton about the company and its activities.

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At the bottom the walls are welded to the tank bottom. This is our path through the years — a path of tradition and continuous renewal. China dry transformer kva China transformer w China transformer kva toroid. We also have another advantage — the especially for us designed software for optimal design of transformers. The leads from the HV winding are insulated with thick insulation paper layer and insulation tubes and press board.

Contemporary automated lines cut the steel sheets delivered in rolls longitudinally and transversally. This site uses cookies. Conservator for TM series The maximum production capacity of the plant has been reached before the end of the past century — 10 pieces of transformers are being manufactured annually.

These are performed upon special request teafo the customer. They have an insulation of cable paper or enamel resistant to hot transformer oil. The neutral terminal of the LV winding for all the transformers is brought out on the transformer cover through a separate bushing that is designed for the full rated current and is insulated for the highest voltage of the LV system. The HV winding is a multi-layer one for the lower ratings and two- or four-section multi-layer, block-coils or continuously wound disk winding for the higher ratings.


The plant introduces a good working system, organized and maintained by high quality experts. Special epoxy resin bushing and plug-in cable connector at the HV side Leprom system optional.

Off-load tap-changer driving mechanism 5. High quality of the welding seams is guaranteed by tests with penetrating agents in a special test field and by testing with over pressure of 40 kPa. China for transformer China transformer kva rating China transformer.

The fitting elements bolts, nuts, washers etc. The inner parts of the core and coil assembly are coated by an oil resistant enamel. Using the scroll is also considered to be a consent!

We have special design and technological departments, thereby the production cycle becomes fully closed — from the design of the transformer to its assembly, in accordance with the requirements of the end customer and every related elprrom and international standard.

The active part is lifted along with the cover by the lifting eyes situated on it. The outer surfaces are coated by several layers of anti corrosion primer and finished by high quality alkyd enamel. Nowadays we have trwfo laboratories for incoming, current and outgoing control of the materials, used in the production, as well as testing laboratory for trado and type testing of the transformers.

Buchholz relay over kVA Dehydrating breather for TM series TANK The standard type of the transformer tanks is rectangular a welded structure with corrugated walls made out of cold rolled steel sheets with low carbon content.

Thus it remains elrom during transportation.

ELPROM TRAFO CH Oil Filled Distribution Transformers 25-2500 KVA

Type tests are performed on each transformer type. For each rated power we offer different series, depending on the no-load and load losses. The quality procedures, according to ISO Welding is done in protective atmosphere Ar-CO2. Trafl can now shorten the production period to a maximum and this way — spare your time. Oil filling venting plug The windings are of cylindrical type situated concentrically on the core limbs.


You, our customers know well that without solid foundation and clear trafp there is no development, and we have both. Each coat is dried up in electric ovens.

Elprom Trafo CH PLC

Upon request the tank and cover are hot-dip zinc galvanized. The off-load tap-changer is situated vertically between two adjacent phases. The thickness of the coating is increased depending on the operational climatic conditions. The active part is fixed to the tank cover and is supported by the tank bottom. Lifting lugs on tank cover Rating e,prom and diagram 4.

Axial bolts do the axial tightening of the windings. Not exactly what you want? Oil-draining and sampling valve DIN 9.

Elprom trafo |

For more than 10 years now the plant has an established and certified quality management system acc. We have a developed and introduced automated system for management of the purchase orders, management system for the technical documentations and management system of the material base of the plant.

Dial type – thermometer with alarm contacts over kVA. Contemporary lines for automatic corrugation and plasma welding produce the tank walls.