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YBD Prefabricated underground box transformer

1、 Overview

China's urban construction is entering the urban beauty stage aimed at improving the street view and city appearance. The pedestrian commercial streets, leisure centers and high-quality areas successively launched in advanced cities can be said to be close to the international standard, and the requirements for the renovation and landscape of the road occupied by box type substations are becoming more and more commercial.

Pre installed underground box type transformer is our company's idea of advocating green power and optimizing urban environment, learning foreign advanced technology, integrating modern urban ecological design concept, and gradually embedding the transformer underground for installation.

Buried transformer, also known as underground transformer, is called underground combined transformer in China. It is installed in the pit, does not occupy the surface space, and can be submerged in water for a period of time. It is applicable to urban distribution networks such as urban residential quarters, industrial parks and urban traffic trunk roads. The use of underground transformer can save the floor area of urban power distribution facilities and improve the utilization rate of urban land. However, the isolated underground transformer does not solve the problem of low-voltage configuration, so its popularization in China is greatly affected.

With advanced technology, the company has carefully created a new generation of underground power distribution equipment - pre installed underground box transformer. This product is composed of underground combined transformer, outdoor low-voltage cabinet, lamp box low-voltage protection shell and prefabricated underground combined transformer foundation. It is a complete set of underground power transformation and distribution equipment pre assembled in the factory. It can also add lamp box cable branch box and lamp box high-voltage metering according to user needs to provide a perfect solution for 10kV power distribution. The prefabricated underground box transformer provided by the company provides brand-new and reliable technical equipment for the transformation of urban power grid into the ground, and is favorable for the transformation of power grid in areas with tight land and housing under environmental constraints. It is mainly used to replace the traditional civil substation, European box substation and American box substation to realize the functions of power transformation and distribution.

2、 Model and description

YBD 口 - 口/口 (口) / 口 - /口

口type: H: ring network, Z: terminal

口 transformer capacity

口 spring operating mechanism

口 load switch and fuse

口 rated voltage (HV / LV)

口 design serial number

YBD prefabricated underground box transformer

3、 Use environment

*Altitude: no more than 1000m;

*Ambient temperature: maximum temperature: + 40 ℃; Minimum temperature: - 45 ℃; Maximum monthly average temperature: + 30 ℃; Maximum annual average temperature: + 20 °℃;

*Installation environment: no explosive and corrosive liquid, gas and dust, no violent vibration and impact at the installation site, and it is allowed to operate partially or completely immersed in water within a certain period of time;

*Ground acceleration caused by earthquake, Ag; Lower than 3m / s in horizontal direction; Lower than 1.5m/s in vertical direction;

*Waveform of power supply voltage: approximate to sine wave;

*Symmetry of three-phase power supply: for three-phase underground transformer, the three-phase power supply voltage shall be roughly symmetrical.

4、 Main features

*Underground box type transformer has the characteristics of corrosion resistance, waterproof, low temperature rise, low noise, convenient installation and maintenance free; It is a typical energy-saving product.

*The oil tank is made of low-alloy structural steel, which has excellent comprehensive mechanical properties, welding properties and low-temperature toughness. The tank adopts thermal zinc spraying technology and plastic spraying treatment, which has strong corrosion resistance.

*The fully sealed structure is adopted, and the exposed parts of high and low voltage terminals are isolated from the environment through imported sealing waterproof materials. When the local buried transformer is installed, it is placed in the pit. When the local pit is flooded or even submerged, it can still operate safely, resist flood disasters, and effectively improve the reliability of the power supply system.

*The unique heat sink structure is adopted to ensure the heat dissipation capacity and anti rust capacity of the heat sink.

*The protective shell of the low-voltage cabinet adopts the patented outdoor light box type protective shell. Both sides of the light box type shell can be equipped with all-weather advertising boards, and the LED light-emitting components with small volume and green energy saving are adopted.

*The foundation of underground transformer is a prefabricated structure, which can be prefabricated flexibly with different materials according to customer requirements.