GCK low-voltage withdrawable switchgear is widely used in power plants, metallurgical steel rolling, petrochemical industry, light industry and textiles, ports and terminals, buildings and hotels and other places as AC three-phase four-wire or five-wire system, voltage 380V, 660V, frequency of 50Hz, rated current of 5000A and below power supply system for power distribution and motor centralized control.
The GCK is type-tested is assembled as a low-voltage switchgear designed to meet the following standards:
National Standard GB7251.1-2005 “Low-voltage Switchgear”
Standard IEC60439.1-1992 “Low-voltage switchgear and control equipment”
- The ambient air temperature is not higher than +40°C and not lower than -5°C, and the average temperature is not higher than +35°C within 24 hours;
- The relative temperature is not more than 50% at +40°C, and a higher relative temperature is allowed at lower temperature, such as 90% at +20°C;
- Clean air, no corrosive and explosive gases, no conductive and insulation-destroying dust:
- When there is no shaking and shock vibration, the inclination should not be greater than 5 degrees for vertical installation;
- The altitude does not exceed 2000 meters;
- The switch cabinet is suitable for transportation and storage at the following temperatures: -25°C to +55°C, and not more than +70°C in a short time (no more than 24 hours);
- If the user cannot meet the above conditions, he or she shall negotiate with the manufacturer.
- Rated insulation voltage: 660V/1000V
- Rated working voltage: 400V/660V
- Rated working voltage of auxiliary circuit: AC 380V, 220V, DC 110V, 220V
- Bus rated current: 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 4000A, 5000A
- Rated short-time withstand current of bus: 50kA, 80kA (effective value) for 1 second
- Rated peak withstand current of bus: 105kA/0.1s, 140kA/0.1s, 176kA/0.1s
- Branch bus rated current: 630A, 1000A, 1250A, 1600A
- Rated short-time withstand current of branch bus: 30kA, 50kA (effective value) for 1 second
- Rated peak withstand current of branch bus: 63kA, 105kA/0.1s
- Enclosure protection level: IP30, IP40
- Bus setting: three-phase four-wire system, three-phase five-wire system
- Operation mode: local, remote, automatic
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