• June 12, 2019

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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Upon request the tank and cover are hot-dip zinc galvanized.


Elpprom automated lines cut the steel sheets delivered in rolls longitudinally and transversally. China dry transformer kva China transformer w China transformer kva toroid.

The fitting elements bolts, nuts, washers etc. Not exactly what you want? We are on the market traof Nowadays we have control laboratories for incoming, current and outgoing control of the materials, used in the production, as well as testing laboratory for routine and type testing of the transformers.

The leads from the HV winding are insulated with thick insulation paper layer and insulation tubes and press board. Contemporary lines for automatic corrugation and plasma welding produce the tank walls. The transport carriage with wheels is fitted to the tank bottom allowing bi-directional movement of the transformer. You, our customers know well that without solid foundation and clear goals there is no development, and we have both.

Dial type – thermometer with alarm contacts over kVA. Special epoxy resin bushing and plug-in cable connector at the HV side Elastimold system optional. Thus it remains stable during transportation. Type tests are performed on each transformer type.


In the upper part the walls are welded to a flange frame to which the tank cover is bolted. This site uses cookies. Thus a sufficient thickness of the protective coating of min. 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.

Rating plate and diagram 4. 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 trao the full rated current and is insulated for the highest voltage of the LV system. We also have another advantage — the especially for us designed software for optimal design of transformers.

Elprom Trafo CH PLC

The plant introduces a good working system, organized and maintained by high quality experts. These are performed upon special request of the customer. The maximum production capacity of the plant has been reached before the elpfom of the past century — 10 pieces of transformers are being manufactured annually. Oil filling venting plug The outer surfaces are coated by several layers of anti corrosion primer and finished by high quality alkyd enamel.

The thickness of the coating is increased depending on the operational climatic conditions. For each rated power we offer different series, depending on the no-load and load losses.


Elprom-trafo Sn Ad, Ul. Dondukov 63 , CO. REGISTRATION NO

Axial bolts do the axial tightening of the windings. One decade later the plant achieves significant development, it is renewed technologically, expands and the production range is extended. The windings are of cylindrical type situated concentrically on the core limbs.

We can now shorten the production period to a maximum and this way — spare your time. Dehydrating breather for TM series The active part is lifted along with the cover by the lifting eyes situated elpro, it. The active part is fixed to the tank cover and is supported by the tank bottom. Conservator for TM series Using the scroll is also considered to be a consent! Special elpom are performed on each transformer type elpfom short-circuit test and noise level measurement.

The inner parts of the core and coil assembly are coated by an traof resistant enamel. They have an insulation of cable paper or enamel resistant to hot transformer oil. 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 national and international standard.