General
GCK low-voltage withdrawable switchgear is widely used in power
plants, substations, factories and mining enterprises and power
distribution centers PC and motor control centers MCC in high-rise
buildings, as AC 50-60Hz, rated working voltage of 660V and below,
and rated current Low-voltage complete set of power distribution
equipment used for power distribution and electric motor
centralized control and reactive power compensation in power
generation and power supply systems of 4000A and below.
Standard
GB7251 Low-voltage switchgear and control equipment
JB/T9661 Low Voltage Withdrawable Switchgear
Gb14048 Low Voltage Switchgear Control Equipment
GB4942 low voltage electrical enclosure protection class
GB3047 Basic dimensions of panels, frames and cabinets
GB9466 Low voltage switchgear basic test method
GB2681 Wire color in electrical installations
IEC439 Low-voltage switchgear and control equipment
Service environment
1. The ambient air temperature should not be higher than +40℃, not
lower than -5℃, the average temperature within 24h should not be
higher than +35℃ if it exceeds, it needs to be derated and run
according to the actual situation;
2. Indoor use: the altitude of the place of use shall not exceed
2000m
3. The relative temperature of the surrounding air should not
exceed 50% when the temperature is +40℃. A larger relative
temperature is allowed at a lower temperature, such as 90% when the
temperature is +20℃. It should be considered that condensation may
occur accidentally due to temperature changes. The impact of
exposure;
4. When the device is installed, the inclination from the vertical
plane does not exceed 5°C, and the entire group of cabinets is
relatively flat (in accordance with the GBJ232-82 standard);
5. The device should be installed in a place where there is no
severe vibration and impact, and where the electrical components
are not corroded;
6. If the user has special requirements, it can be resolved through
consultation with the manufacturer
