Removable AC Metal-clad Switchgear

Ambient Air Temperature: Maximum temperature +40°C, Minimum temperature-15C Humidity Conditions: Daily average relative humidity:≤95% Daily average water vapor pressure does not exceed 2.2kPa Monthly average relative humidity: s90% Monthly average water vapor pressure does not exceed 1.8kPa Altitude: 2500m and below
Seismic Intensity: Not exceeding 8 degrees 
The ambient air should not be subject to corrosive or flammable gases, steam, or other obvious pollution. No places with constant severe vibrations. If used beyond the normal conditions specified in GB3906, it should be negotiated between the user and the manufacturer.

Note: 1. The short-circuit capacity of current transformers should be considered separately.
2. Technical parameters for ZN63A-12 can be found in the corresponding sample.
3. For altitudes of 1000m, rated current should be s1250A, and rated short-circuit breaking current should be s31.5kA.

A.Bus compartment 
B.Circuit breaker handcart compartment 
C.Cable compartment 
D.Metering compartment
1.Shell
2.Branch busbar
3.Busbar bushing
4.Main busbar
5.Static contact device
6.Contact box
7.Current transformers
8.Earthing switch
9.Cable
10.Lightning arrester
11.Earthing busbar
12.Loading and unloading partition
13.Partition（valve）
14.Secondary plug
15.Circuit breaker handcart
16.Heating device
17.Detachable horizontal partition
18.Earthing switch operating mechanism
19.Bottom plate
20.Pressure relief device
21.Control wire trough Schematic diagram of switchgear structure