◇Introduction
    GCS Low-voltage withdrawable switchgear for power distribution system in power plants, petroleum, chemical industry, metallurgy, textile, high-rise buildings and other industries. Place in large power plants, petrochemical and other high degree of automation, requirements, and the computer interface as a three-phase AC frequency of 50 (60) Hz, rated working voltage of 400V, rated current of 4000A and below the hair, the power supply system power distribution, motor centralized control, low voltage power distribution equipment used by the reactive power compensation. 
    Implementation of national standards and specifications:
    IEC439 "Low-voltage switchgear and control equipment"
    GB7251 "Low-voltage switchgear"
    ZBD36001 "Low-voltage withdrawable switchgear assembly"

◇Model defined
   

◇Working conditions
1.Temperature: not higher than +40℃, not lower than -5℃, 24-hour average temperature shall not exceed +35℃。
2.Altitude: not exceed 2000m.
3.Relative Humidity: 90% at +20 ℃.
4.The installation of the device with vertical gradient of not more than 5%.
5.Use of premises: indoor.
6.Devices should be installed in a severe vibration and shock as well as enough to make electrical components should not have a place in corrosion.

◇Main technical parameters
 

◇Structural characteristics
1.The GCS cabinet to improve the transfer capacity of more substantial reduction in the additional temperature rise due to temperature rise of the transition pieces to the connectors, cable head, plate interval.
2.GCS cabinet between the functional units, the isolation between the separated clear, reliable, and not affect other units due to the failure of a unit, so that the fault is limited to the minimum range.
3.GCS cabinet flat arrangement of the device dynamic and thermal stability, can withstand 80/176kA the impact of short-circuit current.
4.The number of loop of the MCC cabinet single cabinet to 22, to give full consideration to the needs of the group of large unit capacity of power generation, petrochemical and other industries automatic electric gate (machine).
5.Device with an external cable connected to the cable in the isolation room, the cable can be up and down and out. Zero sequence current transformer set the cable compartment, easy installation and maintenance.
6.The same power distribution system can match the current limiting reactors to limit short-circuit strength and requirements.
7.The drawer unit has a sufficient number of the second plug (one unit more than 32 pairs, 1/2 unit of 20 pairs), which can meet the requirements of the computer interface and automatic control circuit on the contact number