In response to the standardization construction of national distribution network, meeting the principles of safety, reliability, robustness, universality and interchangeability, and improving the operation and maintenance reliability of ring main unit. The products are fully introduced with advanced production equipment and manufacturing technology, and the combination scheme is flexible. The unit or common box structure can be used. At the same time, the air box uses the safe and environmentally friendly mixed gas to replace SF6 as the insulating medium, which solves the problem of SF6 gas leakage and pollution, and reduces the delivery cycle.

High strength, high sealing

The core parts of the switching equipment are covered with 2.5mm thick high-quality stainless steel by laser welding, which ensures the airbox sealing reliability, high mechanical strength, good corrosion resistance, and the protection  level of the inflatable enclosure reaches IP67; The air box is equipped with explosion-proof diaphragm, which can effectively prevent the damage to people and equipment when the air pressure is too high. All conductive parts are enclosed in the air box, which not only avoids the influence of external environmental factors, but also improves the operation reliability, making it maintenance-free and conforming to the features of miniaturization.

Environmental protection and pollution-free

The insulating medium is zero-level dry air or 99.99% pure N2 in accordance with GB/T 8979-2008. The leakAge of gas will not cause any impact on the external environment, without any recycling treatment.

Perfect mechanical interlocking

With perfect five-guard mechanical interlocking function, all the interlocking functions have been configured in the internal, please operate according to the order of operation instructions, very easy to use.

Flexible and changeable extended design

Modular design, can be a variety of modules through the special busbar connector, diversified unit combination, the maximum to meet the complex and diverse distribution design scheme in China.

Visible fracture

① The earth inspection window adopts the optical imaging principle to maximize the viewing Angle inside the switch.

② The light source is set inside the air box, and the inspection window is used to make the field of vision clear.

③ The lighting source uses LED lamp design, which guarantees the design life of the lamp reliably.

Installation conditions

Altitude: ≤ 2000m;

Environment temperature :-40℃ ~+40℃ , the average temperature within 24 hours does not exceed 35℃ ;

Environment humidity: The average 24-hour relative humidity does not exceed 95%. The average monthly relative humidity does not exceed 90%;

Installation environment: the surrounding air is free from explosive and corrosive gases and fire, and the installation site is free from violent vibration impact;

Seismic capacity :8 degrees, ground horizontal acceleration ≤ 0.4g, ground vertical acceleration ≤ 0.2g.

Note: If the operating environment exceeds the above range, please contact our company.