Low voltage extraction switchgear GCK

The GCK low-voltage extraction switchgear is composed of two parts: the power distribution center (PC) cabinet and the motor control center (MCC). It is suitable for power plants, substations, industrial and mining enterprises and other power users as AC 50Hz, maximum working voltage to 660V, maximum working current to 3150A. In the power distribution system, it is used for power distribution, motor control and lighting and other power distribution equipment.

normal conditions of use

The altitude does not exceed 2000m;
The ambient air temperature is not higher than + 40 ° C, and the average temperature within 24 hours is not higher than + 35 ° C, and the ambient air temperature is not lower than -50 ° C.
Atmospheric conditions: The air is clean, and the relative humidity does not exceed 50 when the temperature is + 40 ° C. When the temperature is low, a higher relative humidity is allowed, for example: 90% at + 20 ° C.
No fire, explosion hazard, serious pollution, chemical corrosion and severe vibration.
The inclination to the vertical plane does not exceed 5 °;
This product is suitable for transportation and storage at the following temperatures: -25 ° C to + 55 ° C, and does not exceed + 70 ° C in a short period of time (no more than 24h).
If the above conditions of use cannot be met, the user should propose to the manufacturer at the time of ordering and negotiate a solution.


structural features


The basic cabinet of this series of products is a combined assembly structure. All structural parts of the cabinet are fastened to each other through screws to form a basic frame, and then door, baffle, drawer, mounting bracket and mother are added as needed
Wire and electrical components and other parts are assembled into a complete switchgear cabinet, which has the following characteristics:
The frame is made of shaped steel, using three-dimensional angle plate positioning, bolted connection without welding structure to avoid welding deformation and stress, and improve installation accuracy.
● Frame and component mounting holes vary according to modulus E = 20mm.
● The internal structural parts are galvanized. After pickling and phosphating treatment, the exterior is sprayed with electrostatic epoxy powder.


structural features

In the power center (PC) wiring cabinet, the top is the horizontal bus area, and the lower part of the horizontal bus area is the circuit breaker room. The circuit breaker can be configured with domestic DW15C, ME and other series | J, and can also be configured according to user needs. Various circuit breakers produced by foreign electrical companies, such as: F series circuit breakers produced by ABB company, and intelligent circuit breakers. Under normal circumstances, the PC unit has a main circuit (including the bus) with a flip row. When the rated current is 630A~ 1600A, it occupies a cabinet with an external size of 800 × 1000 × 2200 (width × depth × height). The main circuit without a flip row occupies a cabinet with an external size of 800 × 800 × 2000 (width × depth × height). When the rated current is 1600A-3150A, it occupies a cabinet with an external size of 100 × 1000 × 2200 (width × depth × height). The main circuit without inversion occupies a cabinet with an external size of 1000 × 800 × 2200 (width × depth × height). The structure of the power center (PC) feed cabinet is similar to that of the incoming cabinet. When the feed current is 630A~ 1600A, a cabinet with a 1000 × 1000 × 2200 (width × depth × height) can be installed with two circuits, which can be installed in the upper and lower arrangement.

The motor control center (MCC) switchgear has two types: wall-mounted and non-wall-mounted. The top of the switchgear is the horizontal busbar area, and the bottom of the horizontal busbar area is the drawer functional unit area. The width of this area is 600mm, and the height of the installation drawer functional unit area is 1840mm. When the cabinet is installed against the wall, the left part of the cabinet is the functional unit area, and the right part has a 200mm wide cable outlet area. The external dimensions of the cabinet are 800 × 500 × 2200 (width × depth × height). When the cabinet is installed from the wall, the width of the cabinet is 600mm. The cable outlet area is at the rear of the cabinet. The external dimensions of the cabinet are 600 × 800 (1000) × 2200 (width × depth × height). There are two types of cabinet depths: 800 and 1000. We recommend that users choose a cabinet with a depth of 1000 to be consistent with the depth of the PC cabinet. When the drawer is pulled out of the cabinet, the live part of the cabinet is not exposed, which is safe and reliable.

The drawer functional unit and the door are mechanically interlocked by the operating mechanism of the main switch. The door cannot be opened when the main switch is in the closing position, and the operating mechanism can be locked in the closing or opening position with an external padlock. The compartments of the functional unit are separated by metal plates. The drawer has good interchangeability and has a working position, a test position and a separation position. When the drawer is pushed to a certain position, the drawer is automatically positioned. At this time, the pull plate drawer on the left side of the drawer can be released from the positioning and enter the next position. When the drawer is pulled out of the cabinet, it also has an anti-falling function. The cabinet of the fixed scheme such as capacitance compensation and measurement has the same appearance shape and the same horizontal bus position as the drawer cabinet. Thus ensuring that the drawer and the fixed cabinet can be used side by side. The busbar of the busbar system cabinet adopts a three-phase five-wire system, a single busbar is used when the rated current of the horizontal busbar is 1250A and below, and a double busbar is used when the rated current of the horizontal busbar is above 1250A. The horizontal busbar between the cabinet and the cabinet is connected by a connecting block. The vertical busbar is closed by a polycarbonate engineering plastic shell, and the arc diffusion is restricted by a baffle inside. The neutral busbar is arranged at the front of the cabinet top, and the protective busbar (PE) is arranged at the bottom of the cabinet. It is connected to the baffle door of the cabinet, thus ensuring the continuity of grounding.

The bottom and top of the switchgear are provided with natural ventilation windows without reducing the protection level of the enclosure.
The cabinet shell protection grade is IP40.

Outline and installation dimensions (mm)

Product installation basic schematic diagram

Product installation basic schematic diagram

When installing this product, the horizontal line between the cabinet and the cabinet should be firmly connected and reliable;
The door of this product has an interlocking function with the main switch, that is, the door can only be opened in the case of power failure. The other sides of this product are screw sealing plates, which have no interlocking function with the main switch. Therefore, please disconnect the power supply when removing the side panel of this product for maintenance.
Non-professionals should not open the cabinet for maintenance.

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