After the power of the urban and rural power grids is transformed to 12KV through primary high - voltage transformation, a large number of regional secondary substations are required to distribute the power to user terminals. The safety and reliability of power distribution equipment directly affect the stability of the power distribution network. Combining years of product R & D and production experience, Siwu Electric Group has developed a new type of SF6 gas - insulated switchgear, which not only meets the requirements of network nodes or user terminals but also satisfies the needs of various secondary substations for the flexible use of compact switchgear.

Product Features

1. Normal operating conditions of the product

− Temperature conditions

Maximum temperature+40°C, minimum temperature - 25°C, and the average temperature is not more than 35°C.

− Humidity conditions

1. The daily average humidity is not more than 95%. The daily average value of water vapor pressure is not more than 2.2kPa.

2. The monthly average humidity is not more than 90%. The monthly average value of water vapor pressure is not more than 1.8kPa.

− Environmental conditions

1. Places without fire, explosion hazards, chemical corrosion, severe pollution, and severe vibration.

2. The seismic intensity does not exceed 8 degrees.

− Altitude

1. The insulation level of the primary high - voltage circuit has nothing to do with the altitude.

2. When the altitude of the SF6 gas - insulated switchgear is greater than 2000m and that of the environmentally friendly gas - insulated switchgear is greater than 4000m, the insulation requirements of the secondary control and auxiliary circuits or other special operating requirements can be negotiated.

− Others

If the operating conditions exceed the above - specified ones andthe normal operating conditions specified in C/T11022, please consult our company for confirmation..

2. Technical features

Modular design

The switchgear is divided into unit cabinet module solutions and common - tank type solutions. In the common - tank solution, in the same insulating gas chamber, a maximum of6 modules can be configured. Expansion busbars should be used to connect the switchgear to achieve a semi - modular structure. Full - module configuration can also be achieved by using expansion busbars between all unit modules. Through different module combinations, power distribution solutions from simple to complex can be formed to meet various configuration requirements of secondary substations and switchgear stations.

Compact structure

According to different functions, the maximum width of all modules does not exceed600MM, and the minimum width is 420MM. The ground - to - height of the cable connection bushings of all units is the same, which facilitates on - site construction.

Unaffected by the environment

All high - voltage live parts are installed in a sealed box. The box shell is made of stainless - steel welded and filled with0.02MPa of dry air. The protection level is IP67. The expansion busbar is fully insulated and shielded to ensure that it is not affected by external environmental changes. It can be installed in places such as humid, sandy, dusty, salt - foggy, mining areas, box - type substations, and places where air pollution is likely to cause surface flashover.

High - reliable personal safety

All live parts are enclosed in the gas chamber. The switchgear has a reliable pressure - relief channel. The isolation and grounding switch is an integrated three - position switch, which simplifies the inter - locking between them. There is a reliable mechanical inter - lock between the cable chamber cover and the switch.