Detailed Product Description

GCK, GCL series low pressure shaft cabinet model switchbox are used for 
electric motor control central, power distributing centre. They are applied to 
power stations, electric substations, buildings, edifices, airports, hospitals, 
industrial and mining establishments as three-phase 50Hz, voltage 380V and 
as follow electric system suited for the electricity, the feed, the illumination,
the motor control and the power compensates. It conforms with the GB7251-97,
ZBK36001-89 and IBC439-1 standards.

GCK, GCL switchbox skeleton is made from "FA28" model material or "c" model 
low-alloy channel steel. The main bus stood parallel to the top of cabinet, door
sealed by silicon adhesive tape, on the upper and lower part of cabinet have 
trepanning for ventilation or heat exchanger systems.

Technical parameters: 
1) Main circuit nominal insulation voltage: 660V
2) Main circuit nominal voltage: AC 380V
3) Auxiliary circuit nominal voltage: AC 220V, 380V, 110V
4) Rated frequency: 50 / 60Hz
5) Rated current: 
    a) Level bus: ≤3,200A
    b) Vertical bus: 1,600A
6) Nominal short time withstand current (IS): 50kA, 80kA
7) Nominal peak reliability current: 105kA, 176kA 
8) Power frequency test voltage:
    a) Main circuit: 2,500V/min
    b) Auxiliary circuit: 1,760V/min
9) Peeling levels of protection: IP3LO, IP4LO
10) Protection:
      a) In circuit design, operating power source adopted electric move measure
          (with isolation transformer)
      b) In mechanism design, we set much value on design between cabinet and 
          insulating; it up to IP40 standards provided by IEC529 and GB4208 and 
          gives a guarantee for personal security of fixing, mending and operator

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%