Product details

Use

GCK low-voltage withdrawable switchgear is widely used in power plants, metallurgy and steel rolling, petrochemicals, light industry and textiles, ports, terminals, buildings, hotels and other places as an AC three-phase four wire or five wire system, voltage 380V, 660V, frequency 50Hz, rated current 5000A and below power supply system for distribution and centralized control of electric motors.

Normal use condition

◊The ambient air temperature shall not exceed+40 ℃, not be lower than -5 ℃, and the average temperature within 24 hours shall not exceed+35 ℃;

◊The relative temperature should not exceed 50% at Langgao temperature+40 ℃, and a higher relative temperature is allowed at lower temperatures, such as 90% at+20 ℃;

◊ Clean air, no corrosive or explosive gases, no conductive or insulating dust:

◊ In situations without shaking or impact vibration, it should be installed vertically with an inclination of no more than 5 degrees;

◊The sea level shall not exceed 2000 meters;

◊The switchgear is suitable for transportation and storage at temperatures ranging from -25 ℃ to+55 ℃, with a maximum temperature of+7 ℃ within a short period of time (not exceeding 24 hours);

◊When the above conditions cannot be met, the user should consult with the manufacturer.

Main technical parameters

◊Rated insulation voltage 660V/1000V

◊ Rated working voltage 400V/660V

◊ Rated operating voltage of auxiliary circuit: AC 380V, 220V, DC 110V, 220V

◊ Rated current of busbar: 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 4000A, 5000A

◊ Rated short-time withstand current of busbar: 50kA, 80kA (effective value) for 1 second

◊ Rated peak withstand current of busbar: 105kA/0.1s, 140kA/0.1s, 176kA/0.1s

◊ Rated current of branch busbar: 630A, 1000A, 1250A, 1600A

◊ Rated short-time withstand current of branch busbar: 30kA, 50kA (effective value) for 1 second

◊ Rated peak withstand current of branch busbar: 63kA, 105kA/0.1s

◊ Shell protection level: IP30, IP40

◊ Busbar settings: three-phase four wire system, three-phase five wire system

◊ Operation mode: local, remote, automatic

Switch cabinet classification

◊Power receiving cabinet

◊ Busbar connection cabinet

◊ Power supply cabinet

◊ Motor control cabinet

◊ Power switch cabinet

◊ Power factor compensation cabinet

Structural features

The basic cabinet frame of GCK is a combination assembly structure, and all structural components of the cabinet frame are galvanized, sprayed, and connected to each other by screws to form the basic cabinet frame. After adding doors, baffles, partitions, drawers, installation brackets, busbars, and electrical components as needed, they are assembled into a complete control center cabinet. The structure of this cabinet has the following characteristics:

♦ Cabinet rack

◊ The cabinet frame is assembled using C-shaped profiles, and the cabinet frame parts and specialized matching parts are supplied by our company to ensure the accuracy and quality of the cabinet body.

◊ The molding dimensions, opening dimensions, and equipment spacing of the components are modularized (modulus E=20mm, the same below).

◊ The internal structural components are treated with galvanizing.

◊ The top cover of the cabinet is detachable, and the four corners of the cabinet top are equipped with lifting devices for lifting and transportation.

◊ The cabinet rack is divided into three mutually isolated sections: busbar room, functional unit room, and cable room, which can prevent the spread of accidents.

♦ Functional unit (drawer section)

◊ The height module of the drawer unit is 200mm, divided into five size series: 1/2 unit, 1 unit, 1.5 unit, 2 unit, and 3 unit. The rated current of the unit circuit is 630A or below.

(See the above picture for the appearance).

◊ Each MCC cabinet can install 9 1-unit drawers or 18 1/2 unit drawers.

◊ The operating mechanism is mechanically interlocked with the drawer, and the drawer cannot be pulled out when the main switch is in the closed position.

◊ The operating mechanism of the drawer can be locked in the closed or open position with a padlock, allowing for safe maintenance of electrical equipment.

◊ The back of the functional unit has a main circuit inlet and outlet plug and an auxiliary circuit secondary plug.

◊ The functional unit compartments are separated by metal partitions.

◊ The drawer unit adopts a rotating pushing mechanism with three position function, making operation simple and reliable.

◊ The GCK drawer pushing mechanism adopts a spiral trajectory movement along the positioning piece to achieve the pushing and pulling out of the functional unit. During the pushing and pulling out process of the functional unit, it realizes three position display and mechanical interlocking, and is equipped with a micro switch. Electrical interlocking can be carried out when testing the position.