◎Overview

GCK low-voltage withdrawable switchgear consists of two parts: power distribution center (PC) cabinet and motor control center (MCC) cabinet. It is suitable for power users such as power plants, substations, industrial and mining enterprises, etc., with AC 50Hz and maximum working voltage up to 660V. The power supply system with maximum working current up to 3200A is used for power conversion, distribution and control of power distribution equipment such as power distribution, motor control and lighting.

This series of products has high breaking capacity, good dynamic thermal stability, advanced and reasonable structure, practical and series circuit scheme, strong versatility; any combination of various scheme units, more than one circuit is accommodated in one cabinet; The area is beautiful, the appearance is beautiful, the degree of protection is high, the safety is reliable, and the maintenance is convenient.

This product complies with C439 "Low-voltage switchgear" GB7251 "Low-voltage switchgear" and ZBK36001 low-voltage withdrawable switchgear).

◎Model meaning

◎Environmental conditions

1. The altitude does not exceed 2000 meters.

2. The ambient air temperature is not higher than +40 °C, and the average temperature is not higher than +35 °C within 24 hours, and the ambient air temperature is not lower than -5 °C.

3. Atmospheric conditions: The air is clean, the relative humidity does not exceed 50% at a temperature of +40 ° C, and the higher relative humidity is allowed at a lower temperature, for example, 90% at +20 ° C.

4. There is no fire, explosion hazard, no serious pollution, chemical corrosion and severe vibration.

5. When installing, it should not tilt more than 5 degrees from the vertical plane. This product is suitable for transportation and storage at the following temperatures: -25 °C - +55 °C. Do not exceed +65 ° C in a short time (not exceeding 24 hours).

6. If the above conditions of use cannot be met, it should be resolved by the user and the manufacturer.

◎The main technical parameters

◎Structure

The basic cabinet of this series is a combined assembly structure. All the structural parts of the cabinet are connected to each other by screw fastening to form a basic frame, and then add doors, baffles, partitions, drawers, mounting brackets and busbars and electrical components as needed. Wait, assemble into a complete switchgear. This cabinet has the following features:

1. The frame adopts C-shaped steel; the three-dimensional gusset is used for positioning, and the bolted connection has no welded structure, thereby avoiding welding deformation and stress and improving the installation precision.

2. The frame and mounting holes vary according to the modulus E=25mm.

3. The internal structure is galvanized. After external pickling and phosphating, it is sprayed with electrostatic epoxy powder.

4. In the power center (PC) inlet cabinet, the top is the horizontal busbar area, the lower part of the horizontal busbar area is the circuit breaker room, the circuit breaker can be configured with domestic CW1, HSW1 series, etc., and can also be configured by foreign electric company according to user needs. Various circuit breakers, such as: E series circuit breakers produced by ABB, and intelligent circuit breakers.

Under normal circumstances, the PC unit has a return main circuit (including bus coupler). When the rated current is 630A~1600A, the cabinet dimensions are 800×1000×2200 (width×depth×height). The main circuit cabinet without backflow has an outer dimensions of 800 x 800 x 2200 (width x depth x height). When the rated current is between 1600A and 3200A, the external dimensions are 1000×1000×2200 (width x depth×height). The main circuit cabinet without backflow has an outer dimension of 1000×800×2200 (width x depth×height).

The structure of the power center (PC) feeder cabinet is similar to that of the incoming line cabinet. When the feeding current is 630A-1600A, a 1000×1000×2200 (width×deep×height) cabinet can be installed with two circuits, which are installed up and down. .

5. The motor control center (MCC) switchgear has two types: wall-mounted and non-wall-mounted. The main part is the horizontal busbar area, and the horizontal busbar area is the drawer functional unit area. The width of this area is 600mm. 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 cabinet dimensions are 800×500×2200 (width×depth×height); For installation from the wall, the cabinet width is 600mm, the cable outlet area is at the rear of the cabinet, and the cabinet dimensions are 600X800(1000)×2200 (width x depth x height). The depth of the cabinet is 800 and 1000. It is recommended that the user choose a 1000-deep cabinet, which is uniform 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, safe and reliable.

6. The drawer function unit and the door are interlocked by the operating mechanism of the main switch. When the main switch is in the closing position, the door cannot be opened, and the operating mechanism can be used.

Use the external padlock to lock in the closing or opening position. The functional unit compartments are separated by a metal plate. Drawers have good interchangeability and work

Position, test position and separation position, when the drawer is pushed to a certain position, the drawer is automatically positioned, and the pull plate on the left side of the drawer can be pulled at this time, and the drawer can be

Unlocate and move to the next position. The drawer is also pulled out of the cabinet for protection against falling off.

7. The cabinet with the fixed solution such as capacitor compensation and metering has the same appearance and the same horizontal busbar position, thus ensuring that the drawer type and the fixed cabinet can be used side by side.

8. Busbar system: The busbar of the cabinet adopts three-phase five-wire system. When the rated current of the horizontal busbar is 1250A or less, the single-chip busbar is used. When the rated current of the horizontal busbar is above 1250A, the busbar is used. The level between the cabinet and the cabinet is the level between the cabinet and the cabinet. The busbars are connected by connecting blocks; the vertical busbars are closed by galvanized plates, and the internal partitions are used to limit arc diffusion: the neutral busbars are arranged at the top or bottom of the cabinet, the protective busbars (PE) are arranged at the bottom of the cabinet, and the partitions of the cabinets The doors are connected to ensure grounding continuity.

9. Natural ventilation windows are provided at the bottom and top of the switchgear without reducing the degree of protection.

10. The cabinet enclosure has a protection rating of P40 (or according to user requirements).

◎Download Google

The user provides the following information:

1. The main circuit scheme and combination arrangement;

2. Auxiliary circuit control and wiring principle;

3. The plane cloth of the switch cabinet in the power distribution room

4. Incoming and outgoing line forms and interface requirements; 5. Detailed models and specifications of components installed in the cabinet

6 switch cabinet surface treatment methods and colors; 7. other special requirements (if any)

◎Installation diagram

◎Installation and use

The installation of the product shall be carried out according to the general installation method of the power distribution equipment. The basic channel steel and the bolts fixed by bolts shall be provided by the user. When the main busbar is connected, the lap joint must be folded and flattened, otherwise the cabinet bolts are loosened for adjustment.

After the product is put into operation, it needs to be inspected and tested before it is put into operation. Check whether the surface coating (such as spray) of the cabinet is damaged, whether the cabinet is dry and clean; check whether there are foreign objects in the cabinet (such as bolts and welding rods). Whether the bolts are tightened or loosened; check whether the operating mechanism is reliable and the movement is accurate; check whether the setting current value of the switch, the scale of the meter, the ratio and polarity of the transformer meet the requirements. Finally, use 1000 megaohms of insulation resistance value, should not be less than 1 megohm, use temporary power supply to test power, electric unit and indication should be accurate before they can be put into operation.

After putting into operation, routine maintenance should be maintained. The heating of the busbar should be measured regularly. If the temperature rise is high or there is abnormal noise, the cause should be ascertained. Cleanup and maintenance work is carried out every 2 to 5 years depending on the operating environment.

GCK series cabinets are low-voltage power distribution cabinets that are installed without wall, frontal operation and double-sided maintenance. The maintenance passages and cabinet doors of the cabinet must be qualified professionals to enter or open for operation, inspection and maintenance.

The air circuit breaker and the plastic case switch have been divided and combined many times, especially after short-circuiting and closing, which will cause partial burns of the contacts and carbon materials.

The contact resistance is increased and should be maintained and serviced according to the operating instructions of the circuit breaker.

After installation or repair, it is necessary to strictly check that the isolation between the compartments and between the functional units has been restored to ensure good functional separation of the device and prevent faults from expanding.