Structural Features

● The basic frame of this product series is a modular assembly structure. All structural components of the frame are interconnected through screw fastening to form the basic framework. Subsequently, doors, panels, partitions, drawers, mounting brackets, busbars, electrical components, and other parts are added as required to assemble a complete switchgear. This cabinet possesses the following characteristics:

  ○ The frame is constructed using shaped steel materials, utilizing three-dimensional angle plate positioning and bolt connections. This welding-free structure prevents welding deformation and stress, thereby enhancing installation precision.

  ○ The frame and component installation holes follow a modular pattern with a pitch of E=20mm.

  ○ The internal structural components undergo galvanization treatment. After acid pickling and phosphating, the external components are coated with electrostatic epoxy powder spray.

  ○ In the Power Center (PC) incoming cabinet, the top section is designated as the horizontal busbar area, and the lower part of the horizontal busbar area accommodates the circuit breaker compartment. The circuit breakers can be configured from series such as DW15C, ME, or various breakers from foreign electrical companies according to user requirements, such as ABB's F-series circuit breakers and intelligent circuit breakers. In general, the PC unit with a flipped main circuit (including the main busbar) and a rated current of 630A-1600A occupies a cabinet with dimensions of 800X1000X2200 (width x depth x height). The main circuit without flipping occupies a cabinet with dimensions of 800x800x2000 (width x depth x height) for the same rated current range. For a rated current of 1600-3150A, the main circuit with flipping occupies a cabinet with dimensions of 1000X1000x2200 (width x depth x height). Without flipping, the main circuit occupies a cabinet with dimensions of 1000X800X2200 (width x depth x height) for the same rated current range. The structure of the Power Distribution Center (PC) feeder cabinet is similar to the incoming cabinet. For feeder currents ranging from 630A-1600A, one cabinet with dimensions of 1000x1000x2200 (width x depth x height) can accommodate two circuits, arranged in an upper and lower configuration.

  ○ The Motor Control Center (MCC) switchgear is available in two installation configurations: against the wall and away from the wall. In both configurations, the top section is designated as the horizontal busbar area, and beneath it is the drawer functional unit area with a width of 600mm and an installation height of 1840mm.When the cabinet is installed against the wall, the left side of the cabinet is allocated for the functional unit area, while the right side features a 200mm-wide cable exit area. The overall dimensions of the cabinet are 800/500/2200 (width/depth/height).In the case of a free-standing installation, the cabinet width is 600mm, and the cable exit area is located at the rear of the cabinet. The overall dimensions of the cabinet are 600x800(1000)x2200 (width x depth x height). The cabinet is available in two depths, 800mm and 1000mm, with a recommendation for users to choose the 1000mm depth to maintain consistency with PC cabinets. When the drawer is pulled out, the live parts inside the cabinet remain enclosed, ensuring safety and reliability.

  ○ The drawer functional unit and the door are mechanically interlocked by the main switch operating mechanism. The drawer cannot be opened when the circuit breaker is in the closed position, ensuring safety. Additionally, the operating mechanism can be equipped with an external padlock for locking in either the closed or open position.Metal plates are used to separate compartments between functional units, and the drawers exhibit excellent interchangeability. They have designated working, testing, and disconnected positions. When the drawer is pushed to a specific position, it automatically locks into place. At this point, pulling the left side plate of the drawer releases the lock, allowing it to move to the next position. The drawer also has an anti-fall feature when pulled outside the cabinet.

  ○ In fixed-type cabinets for applications such as capacitor compensation and metering, the cabinets share the same external appearance and design as the drawer-type cabinets, including identical horizontal busbar positions. This ensures that drawer-type and fixed-type cabinets can be used side by side without any visual discrepancies.

  ○ The busbar system in the busbar system cabinet adopts a three-phase five-wire configuration. For horizontal busbars with a rated current of 1250A and below, a single busbar is used. When the rated current of the horizontal busbar is above 1250A, a double busbar configuration is employed. The connection between horizontal busbars across cabinets is achieved through connecting blocks. Vertical busbars are enclosed in polycarbonate engineering plastic shells, and internal partitions are used to limit the spread of electrical arcs. The neutral busbar is positioned at the front of the cabinet's top, while the protective earth (PE) busbar is located at the bottom of the cabinet, connected to the cabinet's partitions and doors to ensure continuous grounding.

  ○ Natural ventilation windows are provided at the bottom and top of the switchgear to facilitate airflow without compromising the enclosure's protection level.

  ○ The enclosure protection level for the cabinet shell is rated as IP40.

Operating Environment Requirements

● Altitude does not exceed 4000m.

● Ambient air temperature is not higher than +40℃, and the 24-hour average temperature does not exceed +35℃. The ambient air temperature does not drop below -50℃.

● The air should be clean, with relative humidity not exceeding 50% at the highest temperature of +40°C. Higher relative humidity is allowed at lower temperatures, for example, 90% at +20°C, but considering temperature changes, occasional condensation may occur.

● Switchgear should be installed in places without severe vibration and impact, and where electrical components are not subjected to corrosion.

● This device is suitable for transportation and storage processes within the temperature range of -25°C to +55°C. In short periods (within 24 hours), it can reach up to +70°C. The device should not suffer any irreparable damage under these extreme temperatures and should operate normally under normal conditions.

● The installation inclination should not exceed 5°, and the entire cabinet row should be relatively flat (in accordance with GBJ232-82 standards).