Product synopsis:
Underground transformer: a can be installed in a hole in the ground of distribution transformer or combined transformer. General installation in a hole in the ground, do not take up the surface effective space, do not affect visual result, make the power equipment and the surrounding environment harmony, and can avoid unconscious or by external damage to equipment to the influence of peripheral environment and the personnel can also to minimize the extent.
With urban development and urban network reconstruction unceasingly thorough, safe, reliable, and do not take up the surface of the space underground transformer are gradually applied in the city centre's road lighting, residents of electricity and airport, city square, highway, bridge, tunnel lighting, etc.
Product features:
1, suitable for urban environment (installed in the basement or cellar inside), especially for the center populated city;
2, suitable for streets, highway, bridge, tunnel, parking lot, airports, ports, tourist attractions, etc lighting and power system;
Three, high and low voltage into outlet use waterproof totally-sealing, fully insulated, full screen of the connection mode;
4, the body outer covering adopt anticorrosive steel or stainless steel production, the seal, in a period of time can be submerged in water;
5 and protection system fully consider convenient operation and safety by American COOPER, fittings with performance of the company or domestic high-quality products;
6, adopt operating great operation underground transformer are, with a combined transformer the same operation mode;
7, fully consider the particularity of cooling condition, transformer taken low loss and low temperature abandon design;
8, transformer installed inside the cellar into protection and automatic waterproof drainage measures.
The product structure:
Underground transformer into the ground and underground two parts, its ontology with concrete structures installed in the pit, and the earth surface did not take up space, underground transformer and the box cover installed a high-pressure casing well and low-pressure terminals, fuse, plug type recuperators lightning arrester, pressure relief valves, these parts can be on the ground for observation and operation.
Tank adopt stainless steel (or is made of high qualified steel plate multi-layer anticorrosion technology, all made measures) structure of sealing and box along the closed welding structure, reduce seal area, can special environment within long-term safety operation.
Underground transformer are part of the ground for set billboards and low pressure switch box in the integration of mixed structure, cabinet for low-voltage distribution box, inside box on both sides can design for neon billboards, can be used for public welfare advertising, transportation guide, road information etc, has good visual effect.
Using underground transformer and billboards with low-voltage structure of urban ecological design concept, beautify the environment, cover an area of an area small, applicable in the city the main road, airports, highways and the use of residential areas, etc.
Underground type of whole transformer comprehensive control device can through RS485, cable Moden, wireless GSM, GPRS or wireless communications signals foreign send. If use wireless GPRS communication signals foreign send, users need only through the web site to designated landing various parameters of transformer run real-time monitoring.
A about underground transformer waterproof measure
1, basic design and production of waterproof consider when
Top: ducts have effective rainproof waterproof capability
Side parts of concrete material with waterproof, lateral surface treatment, make ooze water can't from pit side invasion;
Bottom: installation of underground transformer waterproof concrete bearing pedestal 300mm den than to face high from the ground, at ordinary times the water flow to the pit is flowing to base the following ring road, not soaked to the underground transformer.
2, basic bottom laid, water can be applied sandy pebble into the ground more quickly.
Three, underground transformer allows certain baptized in water phase-specific operation, but below 0.5 m, effectively improve against floods the reliability of power supply system. But in order to underground transformer are safe and reliable operation, the proposal is in flood, long time heavy rains and after the rainy season, check water pit, such as water more, to advise a pumping and clean.
A about underground transformer are measures for controlling the temperature
For the temperature control of underground transformer, through the following four aspects guarantee:
1, transformer low temperature rise design, top oil temperature control in 45K or so, far below 60K stipulated by the state, design ideas for:
(1) thermal load is directly proportional to the loss and the design production, my company of underground transformer the material used for products, and low loss, compared GB6451-1999 no-load loss low 30%, load low dissipation 15 percent; Compared with 9 series, 20% lower no-load loss, so the heat load is low.
(2) using ring alkyl transformer oil, no need to add additive can make oil medium at extremely low temperatures, and the free flow of good viscosity - time properties make in the flow of oil temperature rises faster, guarantees the product has good heat capacity.
2, body structure
Underground transformer tank wall mainly by radiation heat. Heat wave form always from the radiation to the lower temperature of the surrounding media. Radiation energy depends on temperature, heating element shape and its surface colour. So, underground transformer are used for flat tank and flat fin, to enhance the radiation.
3, surface treatment:
For underground transformer installed in a cool ontology beneath the surface, with special surface treatment technology, ensure its has good heat radiation ability and strong corrosion resistance ability.
4, basic production
Foundation and external heat conduction and air convection, by based top can be set vents and ventilation board, in order to strengthen the air circulation.
Technical performance parameters: