Overview
GCK low-voltage withdrawable switchgear is widely used in power plants, metallurgical rolling, petrochemical, light industry and textile, ports, buildings, hotels and other places as AC three-phase four-wire or five-wire system, voltage 380V, 660V, frequency 50Hz, rated It is used for power distribution and motor centralized control in power supply systems with currents of 5000A and below.
GCK is a high-level low-voltage switchgear assembled and assembled, and is designed to meet the following standards:
National standard GB7251.1-2005 “Low-voltage switchgear”
International standard IEC60439.1-1992 “Low-voltage switchgear and control equipment”
Model Meaning
Normal Use Environment
◆The ambient air temperature is not higher than +40℃, not lower than -5℃, and the average temperature within 24 hours is not higher than +35℃;
◆The relative temperature does not exceed 50% at the highest temperature +40℃, and a higher relative temperature is allowed at lower temperature, such as 90% at +20℃;
◆Clean air, no corrosive and explosive gas, no conductive and insulating dust:
◆In the case of no significant shaking and shock vibration, vertical installation, the inclination should not be greater than 5 degrees;
◆The altitude does not exceed 2000 meters;
◆The switchgear is suitable for transportation and storage at the following temperatures: -25°C to +55°C, not exceeding +70°C in a short time (not more than 24 hours);
◆Users should negotiate with the manufacturer if the above conditions cannot be met.
The Main Technical Parameters
◆Rated insulation voltage 660V/1000V
◆Rated working voltage 400V/660V
◆Rated working voltage of auxiliary circuit: AC 380V, 220V, DC 110V, 220V
◆Busbar rated current: 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 4000A, 5000A
◆Bus rated short-time withstand current: 50kA, 80kA (effective value) 1 second
◆Rated peak withstand current of busbar: 105KA/0.1s, 140KA/0.1s, 176KA/0.1s
◆Rated current of branch bus: 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
◆Shell protection grade: IP30, IP40
◆Bus setting: three-phase four-wire system, three-phase five-wire system
◆Operation mode: local, remote, automatic
