Low Voltage Power Withdrawable Switchgear Cabinet GCS

Low Voltage Power Withdrawable Switchgear Cabinet GCS

Enecell is GCS Low Pressure Withdrawable Switchgear Manufacturer, Company, GCS low-voltage withdrawable switchgear is suitable for power distribution systems in power plants, petroleum, chemical, metallurgy, textile, high-rise buildings and other industries. In large power plants, petrochemical systems and other places with high automation and computer interface requirements, it is used as a low-voltage complete distribution device for power distribution, motor centralized control, and reactive power compensation in power generation and power supply systems.

GCS combined assembly structure can meet the needs of the growing power industry for centralized control of increased power, convenient installation and maintenance, and shortened accident handling time. It is safe, economical, reasonable and reliable. The product has the characteristics of strong connection and disconnection capabilities, good dynamic stability, flexible electrical schemes, convenient combination, strong series and practicality, and novel structure.

Product Overview

GCS low-voltage withdrawable complete set of equipment is a product with high technical performance indicators designed and developed by our company to meet the requirements of the majority of design departments and power users. It is suitable for power supply systems with AC 50-60Hz, rated working voltage up to 660V, and rated current 4000A and below. It is widely used in power plants, petroleum, chemical industry, metallurgy, textile, high-rise buildings for power receiving, feeding, reactive power compensation, power metering, lighting and motor centralized control. It has the characteristics of high breaking and connecting capacity, good dynamic thermal stability, flexible electrical scheme, convenient combination, strong series and practicality, novel structure, high protection level, etc. It is particularly suitable for power use occasions such as low-voltage power control centers and motor control centers in large-scale petrochemical industries with large single-unit capacity, and meets the special needs of computer interface.

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 not more than 2000m above sea level. Places above 2000m should be used at reduced capacity 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: For the rear wiring solution, a cabinet depth of 1000mm is recommended.

Structural Features

This equipment is a fully modular structure with high flexibility. It is flexible and convenient to assemble and has strong versatility of parts and components, which can meet the requirements of short construction period and power supply continuity. The equipment is designed to be operated in front of the cabinet, with outlets at the back of the cabinet, and maintained in front and back of the cabinet. According to needs, the cabinet 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 or high-strength flame-retardant plastic functional boards, which can reduce the destructiveness of fault arcs to a minimum and make each unit relatively independent and independent of each other.

1.1 The functional unit room is located in each independent compartment on the left side of the front 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 at the back or top of the cabinet, and the distribution busbar room is located in an independent compartment on the left side of the back of the cabinet.

1.3 The cable room is located on the right side of the front of the cabinet when the cable is connected to the front of the cabinet, and on the right side of the back of the cabinet when the cable is connected to the back of the cabinet.

2. Cabinet

2.1 The basic frame is composed of profile assembly. The profile is made of aluminum-zinc plate or steel plate with E=20mm as the module installation hole, and is connected by high-strength bolts. The internal dimensions of the device, the dimensions of the components, and the dimensions of the compartments are all changed according to the modules. They can be combined into cabinets of different specifications and different uses according to different cabinet types or actual needs.

2.2 The structure is compact, the cabinet volume is small, the components are highly versatile, and the assembly is flexible. With E=20mm as the module, the structure and the withdrawable unit can be arbitrarily combined to meet the needs of system design.

2.3 A variety of inlet and outlet solutions are available (upper inlet and upper outlet, lower inlet and lower outlet, upper inlet and lower outlet, lower inlet and upper outlet).

2.4 The specific heat capacity of the adapter is high, which reduces the additional temperature rise of the connector, cable head, and partition caused by the temperature rise of the adapter.

2.5 According to the needs of system control, a small 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 to lay power cables and control cables, and is equipped with dedicated primary and secondary wiring terminals and corresponding cable fixings (the primary and secondary wiring terminals of the rear outlet scheme can be laid out separately to avoid cross wiring). According to the cable specifications and the way of entry and exit, 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. It is installed on the top of the cabinet in the rear outlet scheme and on the rear or top of the cabinet in the side outlet scheme.

3.2 The distribution busbar is used to connect the functional unit and the main busbar. "L"-shaped or rectangular busbars can be selected and distributed in the vertical busbar channel. 3-phase or 4-phase distribution busbars can be installed as needed. They can be arranged in full height, half height or in two sections in the middle. After the drawer unit is pulled out, the vertical busbar protection level can reach IP20.

3.3 The neutral busbar and the main grounding busbar are installed in the cabinet and 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 or on the right side of the cabinet. They are equipped with standard modular holes for cable connection.

3.4 The busbars are all made of TMY-T2 series hard copper busbars. The surface of the copper busbars can be tinned, silvered and anti-oxidized as needed to improve the dynamic thermal stability of the busbars 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 160mm, and it is divided into five size series: 1/2 unit, 1 unit, 1.5 unit, 2 units, and 3 units. The rated current of the unit circuit is 400A or less.

4.1.2 Each drawer cabinet can be installed with a maximum of 11 single-unit drawers or 22 1/2 unit drawers.

Drawer unit size

4.1.3 The inlet and outlet wires of the drawer unit can use different numbers of the same specification of the chip structure connector according to the current size.

4.1.4 The drawer unit has a total of 5 positions: closing position, opening position, test position, withdrawal position, and isolation position. The drawer unit can be accurately positioned by the operating handle, and each position has a clear position mark. The operating handle can be equipped with a padlock to lock it in the corresponding position to avoid misoperation.

4.1.5 Each drawer unit is completely independent and the drawers are completely isolated. When the drawer unit is pulled out, the main power supply of the equipment does not need to be cut off. The drawer can be pushed in/pulled out without powering off the adjacent drawer units, and there will be no risk of electric shock.

4.1.6 The drawer unit adopts a CJG type push-in 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 five-position display and mechanical interlocking at the same time. It is equipped with a micro switch test position for electrical interlocking to avoid personal injury or equipment accidents.

4.1.7 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.

4.1.8 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.

4.1.9 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 1/2 drawer unit is realized by the handle installed on the instrument panel.

B: The instrument panel of the drawer of 1 unit and above remains in place when the front panel is opened and closed.

4.1.10 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 plug-ins for 1/2 drawer units is up to 20 cores, and the number of secondary plug-ins for 1 unit and above drawers is up to 32 cores, which can meet the needs of automation users and computer interfaces.

4.1.11 The drawer unit adopts corresponding guide rails to guide the entry and 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 partitioned functional unit (based on fixed, push-in, and pull-out components)

4.2.1 This functional unit retains the advantages of simple structure and convenient operation of the fixed unit, and has the characteristics of clear separation and reliable isolation of the drawer-type functional unit, which is particularly suitable for high-current PC unit applications.

4.2.2 When the push-in or pull-out components are pulled out for maintenance or replacement, there is no need to cut off the power supply. The use of such components can ensure that when the equipment is maintained, only the components of the corresponding circuit need to be pulled out 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 off state, thereby enhancing the safety of equipment operation. The operating handle can be locked in the corresponding position with a padlock to avoid misoperation.

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. Schematic diagram of Feng circuit, primary system diagram.
2. Auxiliary circuit electrical schematic diagram, terminal arrangement diagram. If there is no schematic diagram and terminal arrangement diagram, follow the manufacturer's standards.
3. Equipment layout combination diagram, plane layout diagram.
4. Model, specification, and quantity of main electrical components in the equipment.
5. Inlet and outlet line mode, cable specifications. If busbar connection is required between equipment rooms or incoming line units, data such as busbar span and height from the ground should be provided.
6. Equipment surface color.
7. Other special requirements should be negotiated with the manufacturer.

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