Rated working voltage: AC 380V / 660V (400V system is common).
Rated insulation voltage: AC 660V / 1000V.
Rated frequency: 50Hz.
Main bus rated current:
Horizontal bus: 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A (depending on the design)
Vertical bus: Usually 1000A (higher specifications are also available).
Rated current of branch busbar (drawer unit): According to the drawer size and design, common ones are: 16A, 32A, 63A, 100A, 160A, 200A, 250A, 315A, 400A, 630A, etc.
Rated short-time withstand current:
Horizontal busbar (1s): Usually 30kA, 50kA, 65kA, 80kA, 100kA, etc.
Vertical busbar (1s): Usually 30kA, 50kA, 65kA, etc.
(Specific values need to refer to the manufacturer's sample and actual design).
Rated peak withstand current: Usually 2.2 times the rated short-time withstand current (when cosφ=0.5).
Power frequency withstand voltage:
Main circuit: Usually 2500V (1min).
Auxiliary circuit: Usually 1760V (1min).
Protection level:
Cabinet housing: IP30, IP40 (common).
When the functional unit door is closed: IP40, IP54 (common).
When the functional unit door is open: IP20.
Drawer unit mechanical life: Usually ≥ 2000 plug-in and pull-out operations.
Dimensions (width x depth x height):
Width: Commonly 600mm, 800mm, 1000mm.
Depth: Commonly 800mm, 1000mm.
Height: Commonly 2200mm.
(Dimensions may vary according to requirements and manufacturer design).
Temperature rise: Complies with GB standards, with different temperature rise limits for different parts (e.g. busbar connection ≤70K).
High reliability: solid structure, good isolation, standard selection of components, stable and reliable operation.
Easy maintenance and repair: The pull-out design is the biggest advantage. When a fault occurs or maintenance is required, you only need to pull out the corresponding drawer to the separated position, without cutting off the power supply of the entire cabinet, which greatly shortens the power outage time and improves the continuity of power supply.
High flexibility: The modular design makes the drawer unit configuration very flexible, and drawers with different functions and capacities can be freely combined according to on-site requirements. It is convenient for expansion and transformation.
High safety: perfect mechanical interlocking and electrical interlocking (such as circuit breaker status and drawer position interlocking), reliable grounding system, and effective separation ensure the safety of operators and maintenance personnel.
Relatively small footprint: Due to the vertical arrangement of drawers, the space utilization rate is high. Compared with fixed partition cabinets, it may be more compact (especially in height) with the same number of circuits.
Strong versatility: It is one of the standard cabinet types widely used in China, with rich experience in design, manufacturing, installation, operation and maintenance, and relatively easy to obtain spare parts.
Full-featured: It can be configured with multiple functional units such as incoming line cabinet, feeder cabinet, motor control cabinet (MCC), capacitor compensation cabinet, contact cabinet, etc. to meet various low-voltage power distribution needs.
