S13(22)-MD Underground Transformer
1.1 Types and meanings of underground distribution transformers
Product Overview
Buried transformer is a kind of distribution transformer or combination transformer which can be installed in the pit, and it can realize the compact combination power distribution facility with transformer, high-voltage load switch and fuse for protection installed in the tank. Citation standard: JB/T 10544-2006.
Buried transformers can be used for both roads, bridges, tunnels and other long-distance, small load high-voltage transmission system, overhead lines into the underground project of combined transformers and community power supply system. Widely used in power supply with high reliability, no impact on the surrounding environment, three groups of 50HZ, voltage level 10kV and the following underground transmission and distribution network for urban arterial roads, airports, bridges, tunnels, large green areas, parks and other venues to cooperate with the power distribution and lighting.
Pre-assembled buried transformer box-type substation consists of buried transformer, advertising light box-type switchgear and prefabricated pit combination, is pre-assembled in the factory, factory test qualified complete sets of equipment. The product consists of two parts of equipment below and above the ground surface, the part below the ground surface includes prefabricated (or on-site concrete casting) pit and buried transformer, and the part above the ground surface includes advertisement light box type (or traditional) outdoor switchgear and ventilation and heat dissipation channel. The products are suitable for various power distribution systems in the city, especially the cable underground transformation and other municipal construction power supporting projects.
Landscape buried box transformer is the company's independent research and development production, by the buried combination transformer, outdoor high and low voltage cabinet, light box type protection shell and prefabricated buried transformer foundation composed of a new type of transformer. The transformer can also according to the characteristics of the environment, tailor-made and the surrounding environment combined style, further to do into and beautify the environment.
Product Features
Small footprint, no surface area, good landscape effect, simple construction.
It realizes the way of installing near the load center and decentralized power supply, saves the number of low-voltage cables and investment, reduces the loss on the line, and operates economically.
Protection class IP68, anti-explosion, can be completely flooded operation in a certain period of time, effectively improve the reliability of the power supply system.
The fuel tank adopts full insulation, full sealing, full welding structure, can withstand 70kPa pressure without oil, no deformation, effectively improve the comprehensive mechanical properties of the fuel tank; no need for insulation distance, reliably guarantee personal safety; the use of a unique heat sink, to ensure that the mechanical strength of the heat sink and the ability to dissipate heat.
High and low voltage cable connections can be realized in the following ways:
1, the use of three-phase simultaneously inserted into the transformer internal three-phase cable connectors and special forms of cable plug connector (applicable to the voltage level of 10KV and below, the capacity of 400kVA and below the three-phase buried transformer)
2, Using single-phase cable connector and elbow-type pull-out cable plug connector (applicable to three-phase buried transformer with voltage level of 10KV and below and capacity of 1600KVA or below).
3, connector loaded with specific gravity greater than water patented insulating wave body, clamor connector insulation liquid and transformer separate, to ensure that in the capillary phenomenon of water seepage under normal operation.
It can be equipped with oil-immersed load switch. Realize on-off and off operation with load; realize ring network and terminal power supply mode, which is very convenient for conversion and improve the reliability of power supply.
Pre-installed buried transformer box substation light box type switchgear easy to install, display advanced sensory, and, advertising light box media advertising can also create better economic benefits.
Pre-installed buried transformer box variable using natural ventilation to transformers, pits and light boxes for the overall temperature rise design, the transformer in the pit rated load operation of the temperature rise value to meet the requirements of GB1094.2.
The pit can be fitted with an automatic drainage system, which is activated automatically when affected by special circumstances such as flooding.
