Transformer station doors are manufactured in accordance with panel and profile doors technology. The selection of technology depends on the project of a particular transformer station as well as the requirements of the power distribution companies containing basic technical requirements for doors to be installed in the transformer station. The regulations of particular power distribution companies standardize the technical solutions used while designing, constructing, and modernizing of power facilities subjected to them, establishing very often additional requirements in the scope of implementation and door fittings. Panel doors intended for the external closing of electrical substations are architecturally matched to the form and coloring of building facades through appropriate selection of fittings and finishing of the sheathing of door leafs and a door frame. The sheathing of door leafs and door frames can be laminated, powder-coated in RAL colors, or made of stainless steel.
Profile doors used in electrical substations ensure maximum use of space for assembling of ventilation louvers, while steel panel doors guarantee a high level of protection as well as broad possibilities of door fittings that meet the requirements of power distribution companies. Due to the requirements relating to heat dissipation ventilation from transformer chambers and protection against condensation water on electrical devices, door leafs are equipped with ventilation grates or louvers with a defined, active surface of ventilation; the selection of appropriate ventilation grates units ensure a proper level of air infiltration to transformer stations. While planning the location of ventilation grates on a door leaf, it is necessary to remember that minimum frieze of a steel panel door leaf is 200 mm and a minimum plinth block is 300 mm; ventilation louvers should guarantee a proper level of IP protection. On request, ventilation louvers with the appropriate structure of lamellae are manufactured along with additional mesh that prevents penetration and hampers the passing of foreign elements to the inside of a transformer station.
The doors are equipped with corner door frames with sockets connected with door leafs by means of LGY cable; it is possible to order the doors with fixed door frames or adjustable door frames.
The door fittings with a panic lock, which facilitates opening the doors from the interior in case of any threat, may be provided.
are manufactured in both versions: non-fire and fire-resistant classes EI30 or EI60, soundproof doors are also used in order to reduce the noise level emitted by a transformer station. The projects of transformer station buildings often provide the usage of doors with proper thermal insulation for heating reduction of electrical devices during hot summer days.
Doors for power industry used in aggressive environment are made of stainless steel. Above-standard door fittings for a transformer station are: emergency closure of door leafs with a padlock made of a flat steel bar, door opening sensors, automatic interior lightening switches for transformer stations, restrictor stays for door leafs opening and door blocking, as well as lock cylinders with identical coding or with a Master key system.
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