1. Strctural features

l The main frame of the cubicle is firstly pressed by the cold-roll steel sheet and then formed by welding,. The side column is modularized (E=20mm). The door of the cubicle is processed with the epoxy resin electrostatic spraying technology. The inlet lines are led in from the top and led out from the bottom. Besides, it is small in size, elegant in appearance and easy for installation;

l The vacuum circuit breaker and the disconnector can be installed both at side or in front. The bus bar chamber is separated from the vacuum circuit breaker and the disconnector by the steel sheet. The inlet and the outlet are equipped with the earthing switch;

l There has the mechanical interlocking mechanism between the circuit breaker and the disconnector . Till the circuit breaker and the disconnector are off, the door can be opened, fully realizing the function of Fail Safe;

l If requested by the user or necessary for the design, it can adopt the vacuum circuit breaker or SF6 switch. Besides, CT, PT and arrestor are optional inside the cubicle;

l According to the requirement of user and the design, it can provide the vacuum breaker inside the cubicle  

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 and manufacture as per the requirements suitable for the highland altitude.

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  1.8*10^-3 Mpa or below while the monthly average not larger than 1.8*10^-3 Mpa; 

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