GCK Low Voltage Withdrawable Switchgear Cabinet

Low voltage withdrawable switch Cabinet GCK

Enecell is Famous China GCK Low Voltage Withdrawable Switchgear Cabinet Manufacturers,Supplier, GCK series low voltage withdrawable switch cabinet is designed according to the needs of the majority of users. It has the characteristics of compact structure, beautiful appearance, good electrical performance, high protection level, safety and reliability, and convenient maintenance. It is an ideal power distribution equipment for low voltage power supply systems in metallurgy, petroleum, chemical industry, electricity, machinery, textile and other industries. It is listed as a recommended product for two-network transformation and energy-saving product by the state.

GCK combined assembly structure, the cabinet frame is made of hot-rolled steel STHC, FA profiles are positioned by angle plates, bolted, non-welded structure, and the forming dimensions, opening dimensions, and equipment clearances of parts are modularized.

Product Overview

GCK low-voltage withdrawable complete set of equipment is suitable for power supply systems with AC 50-60Hz, rated working voltage up to 660V, and rated current 6300A and below. It is widely used in low-voltage distribution systems in power plants, substations, industrial and mining enterprises, high-rise buildings, etc., as power receiving, feeding, reactive power compensation, power metering, lighting and motor control center, etc., for power conversion, distribution and control.

This product complies with relevant standards such as IEC60439-1, GB7251.1 "Low-voltage complete switchgear and control equipment" and GB/T 24274 "Low-voltage withdrawable complete switchgear and control equipment".

Product model meaning

Normal Use Environment Conditions

1. The ambient air temperature is not higher than +40℃, not lower than -5℃, and its average temperature within 24 hours is not higher than +35℃. The equipment should be used at reduced capacity when it exceeds the above environment.
2. The relative humidity does not exceed 50% when the maximum temperature is +40℃. A higher relative humidity is allowed at a lower temperature, such as 90% at +20℃. The influence of condensation that may occur accidentally due to temperature changes should be considered.
3. The installation site is usually installed at an altitude of no more than 2000m. For places above 2000m, the capacity should be reduced accordingly.
4. Install in a place without fire, explosion hazard, severe dust, chemical corrosion, severe vibration and impact.
5. If the above conditions cannot be met, the user and the manufacturer should negotiate to resolve.

Main Technical Parameters

Note: It is recommended to use a cabinet depth of 1000mm.

Structural Features

This equipment is a combined assembled structure. All the structural parts of the cabinet frame are galvanized (or coated with aluminum zinc plate), equipped with the required doors, baffles, partitions, drawers, mounting brackets, busbars and various electrical components, etc., to assemble a complete control center equipment. Because of the flexible and convenient assembly and the strong versatility of parts, it can meet the requirements of shorter construction period and power supply continuity. The equipment is designed to be operated in front of the cabinet, with outlets behind the cabinet, and maintenance in front and behind the cabinet. According to needs, the cabinet body can be composed of drawer cabinets, fixed cabinets, mixed cabinets, fixed partition cabinets and other combinations.

1. Area division

According to different requirements, each equipment is divided into three compartments, namely functional unit room, busbar room, and cable room. The compartments are separated from each other by steel plates and are independent of each other to effectively prevent accidents caused by arcing caused by faults of switching elements and short circuits between busbars.
1.1 The functional unit room is located in each independent compartment on the front side of the cabinet, which is used to install drawer units or fixed partition units.
1.2 The busbar room is divided into the main busbar room and the distribution busbar room. The main busbar room is located on the top of the cabinet, and the distribution busbar room is located in an independent compartment on the left side behind the cabinet.
1.3 Due to the design of the outlet at the back of the cabinet, the cable room is located at the back of the cabinet.

2. Cabinet

2.1 The basic frame is composed of C-profiles. The C-profile is made of steel plates or aluminum-zinc plates with E=25mm modular mounting holes, which are bent and connected by high-strength bolts. It can be assembled into various forms of cabinets without special tools, and has high strength and flexibility.
2.2 The internal dimensions, component dimensions, and compartment dimensions of the cabinet are modularized. According to different cabinet types or actual needs, the structure and withdrawable units can be arbitrarily combined into cabinets of different specifications and uses.
2.3 The compartments are separated by steel plates, and the upper and lower drawers are separated by partitions with ventilation holes to ensure safety and effective heat dissipation.
2.4 A variety of inlet and outlet cable options are available (upper inlet and upper outlet, lower inlet and lower outlet, upper inlet and lower outlet, lower inlet and upper outlet).
2.5 According to the needs of system control, a control busbar can be set up and installed in a dedicated compartment, which can be laid in the entire system.
2.6 The cable room is used for laying power cables and control cables. It is equipped with primary and secondary wiring terminals and corresponding cable fixings for rear-outlet wiring (the primary and secondary wiring terminals of the rear-outlet solution can be laid out separately to avoid cross wiring). According to the cable specifications and entry and exit methods, entry and exit holes are reserved on the bottom plate or top plate. The compartment design makes it very convenient for cables to enter and exit from top to bottom.

3. Busbar system

3.1 The main busbar can be arranged in an independent busbar room. Each phase consists of a single or multiple copper bars, which are installed horizontally on the top of the cabinet and supported by a high-strength busbar frame, with good dynamic stability.
3.2 The distribution busbar is used to connect the functional unit and the main busbar. Rectangular busbars are selected and distributed in the vertical metal busbar channel. 3-phase or 4-phase distribution busbars can be installed as needed. After the drawer unit is pulled out, the protection level of the vertical busbar can reach IP20.
3.3 Neutral busbars and main grounding busbars are installed in the cabinet, which are installed under the cabinet. The length of the busbar is determined by the transportation unit of the equipment. The neutral and grounding branch busbars are installed vertically in the cable room behind the cabinet, and are equipped with standard modulus holes for cable connection.
3.4 The busbars are all made of TMY-T2 series hard copper bars. The surface of the copper bar can be tinned, silvered and anti-oxidized as needed to improve the dynamic thermal stability of the busbar and improve the temperature rise of the contact surface.

4. Functional units

4.1 Drawer-type functional units
4.1.1 The height of a single-layer drawer unit is 200mm, and it is divided into five size series: 8E/4, 8E/2, 8E, 16E, and 24E. The rated current of the unit circuit is 630A or less.
4.1.2 Each drawer cabinet can be installed with a maximum of 9 single-unit drawers, 18 8E/2 unit drawers, or 36 8E/4 unit drawers.

Drawer unit size

4.1.3 The drawer unit has 5 positions, including closing (connection) position, opening position, test position, withdrawal/advance position, and isolation position. The drawer unit can be accurately positioned by the operating handle (8E/4, 8E/2) or the operating handle (8E and above). Each position has a corresponding mark, which is simple and intuitive. The operating handle can be equipped with a padlock to lock it in the corresponding position to avoid misoperation.
4.1.4 Each drawer unit is completely independent and the drawers are completely isolated. When the drawer unit is withdrawn, the main power supply of the equipment does not need to be cut off. The drawer can be pushed/pulled out without powering off the adjacent drawer units, and there will be no risk of electric shock.
4.1.5 The drawer unit adopts a JG type rotary push operating mechanism, which uses a spiral trajectory to move along the positioning piece to complete the push and pull of the drawer unit, and realizes four-position display and mechanical interlocking at the same time. It is equipped with a micro switch that can be electrically interlocked in the test position to avoid personal injury or equipment accidents.
4.1.6 During operation, it is possible to set parameters or check the internal conditions of the drawer unit. If the drawer panel needs to be opened, the front panel of the drawer unit can be opened with the corresponding tools.
4.1.7 The drawer changes only in height, and its depth remains unchanged. The same drawer unit has complete interchangeability. The drawer unit plug capacity configuration is detailed in the table below.

4.1.8 The drawer unit is equipped with an instrument panel for installing metering, measuring, operating, indicating and other devices
A: The operation of the main switch of the 8E/4 and 8E/2 drawer units is achieved by a handle installed on the instrument panel.
B: The instrument panel of the 8E and above drawer units remains in place when the front panel is opened and closed.
4.1.9 The primary outlet side is directly connected to the fixed outlet adapter, and the secondary outlet side is connected through a dedicated secondary connector. The number of secondary connectors of the 8E/4 drawer unit is up to 16 cores, the number of secondary connectors of the 8E/2 drawer unit is up to 20 cores, and the number of secondary connectors of the 8E and above drawer units is up to 24 cores.
4.1.10 The drawer unit adopts corresponding guide rails to guide the entry, exit and positioning of the drawer unit. The guide rails are equipped with anti-drop devices to effectively prevent the drawer from sliding when pulling the drawer unit.
4.2 Fixed-separation functional unit (based on fixed, plug-in, and withdrawable components)
4.2.1 This functional unit retains the advantages of simple structure and convenient operation of fixed units, and has the characteristics of clear separation and reliable isolation of drawer-type functional units, which is particularly suitable for high-current PC unit applications.
4.2.2 When plug-in or withdrawable components are withdrawn for maintenance or replacement, there is no need to cut off the power supply. The use of such components can ensure that when maintaining the equipment, only the components of the corresponding circuit need to be withdrawn without affecting other circuits of the entire distribution system.
4.2.3 The functional unit is interlocked with the rotary handle on the panel through the operating mechanism, which can ensure that the panel of the functional unit can only be opened when the circuit breaker is in the open state, thereby enhancing the safety of equipment operation.
4.2.4 When the equipment is running, if you need to set parameters or check the internal components of the unit, you can use the corresponding unlocking tool to open the front panel.

Ordering Instructions

When ordering, users should provide the following information:
1. Feng circuit scheme diagram and primary system diagram.
2. Auxiliary circuit electrical schematic diagram and terminal arrangement diagram. If there is no schematic diagram and terminal arrangement diagram, follow the manufacturer's standard.
3. Equipment arrangement and combination diagram and floor plan.
4. Model, specification and quantity of main electrical components in the equipment.
5. Inlet and outlet line mode and cable specifications. If busbar connection is required between equipment or incoming line unit, busbar span, height from the ground and other data should be provided.
6. Surface color of the equipment.
7. Other special requirements should be negotiated with the manufacturer.

Application Case

Nanjing Zhonggui Pharmaceutical Smart Factory Project
Guangzhou Nanpingshan Second Village Economic Development Zone Project
Shunde Shenghui Holdings Headquarters Park
Qingzhou Museum New Building Intelligentization Project
Dongguan China-Israel International Science and Technology Cooperation Industrial Center
Zhengzhou Tianqin Bay Project
Dongguan Country Garden Vientiane Songhu Phase IV
Putian Helenberg Jiuyuefu Project
Baoneng City Garden Project
Country Garden Zhengyang Park Phase I Project

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