1. Strctural features

l The cubicle is made of the imported alloy-coated steel sheet or high-quality cold-roll steel sheet, and processed by the CNC machining and the multiple folding technology, and then assembled by the rivets and the high-strengthen bolts. With the application of the electrostatic spraying technology, the door has great impact and corrosion resistance capability, and high mechanical strength and elegant appearance.

l With the adoption of the solid insulating material and epoxy covered insulating technology, and optimization of the electrode shape, the cabinet has the advantages of compact structure so as to reduce occupying space.

l Equipped with new compound insulation vacuum breaker, the handcart of the same type can be interchanged reliably, and provide with domestic ZN85-40.5 vacuum breaker and Schneider SF serial breaker for different client’s requirement.

l The switchgear chamber is equipped with metal diaphragm packer, and a separate pressure release channel.

l The breaker and the earthing switch are operated under the condition of the closed high voltage room

l It is provided with the mandatory mechanical blocking interlocking between the circuit breaker cart and the switchgear door, fully meeting the requirement of Fail Safe.

l There has sufficient linking and maintenance room in the cable chamber. The height of the cable linking is around 800mm which is high enough to connect several cables and easy for the maintenance.

l The cubicle is divided into four independent chambers, supporting overhead incoming and outgoing lines, incoming and outgoing cables and other functional schemes. After the permutation and the combination, it can form various power distribution devices.

2. Ambient conditions

l For the normal design, the altitude should be not more than 1,000m. If above 1,000m, it will design according to the altitude correction factor of the highland.

l The ambient air temperature ranges -35℃~+40℃, and the average temperature within 24h ≤ +35℃. If exceeding the specified time, it has to reduce the capacity according to the actual condition;

l The relative humidity should not exceed 50% at +40℃, while at lower temperatures, larger relative humidity is acceptable, e.g. 90% at +20℃. Considering the change of temperature may sometime cause the condensation, the daily average should be less than 95% and the monthly average less than 90%;

l The water vapour average should be 2.2*10^-3Mpa or below while the monthly average not larger than 

1.8*10^-3Mpa;

l The gradient between installation surface and vertical plane is ≤  5°;

l The seismic intensity should be not more than 8 degree;

l Frequent severe violation is acceptable;

l No pollution is allowed to the ambient air, such as corrosive substance, flammable gas, vapour and so on.

3. Technical parameters

4. Size specification