Explosion Proof Cabinet for Low Voltage Switchgear Cubicle with Power Distribution

Key Specification   
WM series low voltage withdrawable electric cabinet is suitable for power generation and supply systems with power levels of 3-phase AC 50Hz, rated working vlotage 400V(690V) andrated current up to 4000A, satisfying power distribution, motor centralized control and apacitance compensation.
The cabinet has its function unit adopted with modular design, enabling flexible and convenient unit combination, which can achieve and replace all proposals and functions owned by modified MNS, standard GCS, modified GCS as well as GCK available in the market.
Dimension of Cabinet
Height      *     Width      *        Depth
2200mm       600mm            800/1000mm
                      800mm            800/1000mm
                     1000mm           800/1000mm
Main Characteristics 
1. Main circuit plug: It is of stainless material, with stable and reliable performance, the waffled plug with four copper sheets as a gang, each has a separate contact spring fixation structure with strong withstand overload current capability.
2. Sencond conncetor: more convenient and more attracive.
3. Hinge: Used at drawer doors and fixed doors, installation of embedded type(without welding studs), all with high-precision allumen hinges, can improve the overall outlock of the cabinet, to ensure consistency of protection degree.
 
Applicable Standards:
GB3906-97 "AC metal closed switchgear 3-35kV"
GB/T11022 "Technical Requirements on High Voltage Switch Device & Control Device Standards"
IEC60298  "AC Metal Enclosed Switch and Control Device above 1kV, below 50kV"    
DL404-97 "ordering technical qualification of in-door AC high-voltage switch cabinet"
 Working Conditions of Cabinet
          Environment temperature:-10°C--40°C
Environment humidity: the daily average value should be no greater than 95%, the monthly average value should be no greater than 90%
Altitude: lower than 1000m
Earthquake proof degree: earthquake intensity no more than 8 degrees
The around atmosphere should not contain distinct pollutions such as corrosive or flammable gas or steam
No severe contamination or frequency severe vibration, and the design of rigid grade under condition should meet the requirements of grade 1
If the working conditions can not meet the environmental requirements of GB3906,please negotiate with the manufacturer
Notes: 1. Electric heater should put in operation when relative humidity exceeds 70%
           2. When working site is beyond the altitude of 1000m,it should conform to JB/Z101-71

Technical parameter
 

items			Unit	parameter
Rate voltage			kV	12
Rate frequency			Hz	50
Rated main bus bar current			A	630 ,1250,1600,2000,2500 ,3150
Rated branching bus bar current			A	630 ,1250,1600,2000,2500 ,3150
Short-time withstand current(4S)			kV	20,25,31.5,40
Peak withstand current(peak.)			kV	50,63,80,100
Rated short drop out current			kV	20,25,31.5,40
Rated short circuit open and cut(Peak)			kV	50,63,80,100
Rated insulation level	1min power frequency withstand voltage	ph-ph,ph-ground	kV	25,30,42
		breaker gap	kV	27,34,48
Rated lighting impulse withstand voltage(Peak)		ph-ph,ph-ground	kV	40,60,75
		breaker gap	kV	46,70,85