Detailed Product Description 
GGD alternating current low pressure switchbox is suited for alternating current
50Hz, nominal working voltage 380V, rated working current 3,150A of power station,
electric substation, industrial and mining establishment. It is used for electric
energy transfer, distributing and control of power, lighting and distributing
facility.
GGD alternating current low pressure switchbox made from "FA28" model material or
"c" model low-alloy channel steel, which have high breaking capacity, good hot
stability, electric project agility, easy assembly, strong practicability, attractive
frame, high degree of protection. It conforms with GB7251-97 and IEC439-1
standards.
Main technical parameters:
1) Main circuit nominal insulation voltage: 660V
2) Main circuit nominal voltage: AC 380V
3) Auxiliary circuit nominal voltage: AC 220V, 380V, DC 110V, 220V
4) Rated frequency: 50 / 60Hz
5) Rated current (main bus): ≤3,150A
6) Nominal short time withstand current (IS): 50kA, 80kA
7) Nominal peak reliability current: 105kA, 176kA 
8) Power frequency test voltage:
9) Main circuit: 2,500V/min
10) Auxiliary circuit: 1,760V/min
11) Peel level of protection: IP3LO, IP4LO
Order instructions:
1) Circuit project, signal system diagram and solid wire system diagram 
2) Arranged diagram of switchbox and the floor plan diagram of switch room
3) Sensitive electronic components list in box 
4) Adjustment variable as voltage, current, time etc in circuit
5) The location and dimension of earth wire 
6) About other requirements, please explained in order 
Usage conditions: 
1) Working altitude limit: 2,000m
2) Indoor, no dust, aggressive gas or rain   
3) Ambient temperature and relative humidity: no higher than 40°C, no lower
    than -5°C, average temperature limit of 35°C, relative humidity limit
    of 85% 
4) No shock and bump
5) Fixing inclination pitch is not over 5%