Introduction to GCS Drawer Cabinet Products  

I. Overview and Core Functions  
1. Basic Definition  
   GCS complies with the standards of IEC 60439, GB 7251.1 and ZBK36001, and has passed the national mandatory "3C" certification.  

2. Core Application Scenarios  
   - Voltage/Frequency: AC 50/60Hz, rated operating voltage 400V (maximum 660V), rated current 100–4000A.  
   - Functional Positioning: Power distribution, centralized motor control, reactive power compensation, and electric energy distribution, applicable to:  
   - Power plants, petrochemical industry, metallurgy, and high-rise building power distribution systems;  
   - Places with a high degree of automation and the need for interface with computers (such as large petrochemical plants).  

II. Structural Design Features  
1. Frame and Modular Design  
- Main Frame: Adopts 8MF-type open section steel with modular mounting holes (E=20mm/100mm), supporting flexible assembly and partial welding to adapt to rapid deployment.  
- Functional Area Isolation: Strictly divided into three independent compartments:  
- Functional unit room (drawer area)  
- Busbar room (horizontal busbar at the rear)  
- Cable room (supporting upper and lower incoming/outgoing lines).  
  Advantage: Avoid cross-interference, no need to touch live busbars during maintenance, improving safety.  

2. Drawer Unit Design  
- Standardized Module: The height of the drawer is based on a 160mm module, with unified width and depth, divided into five sizes:

Type	Size modules	Maximum current	Maximum configuration per cabinet
1/2 unit	8E/2	≤400A	22
1/2 unit	8E	≤400A	11
3/2 units	16E	≤400A
3 units	32E	≤400A

- Operation and Safety:  
- The drawer is equipped with five position indicators (open, closed, test, extracted, isolated);  
- Mechanical interlocking device: Ensures that the drawer door cannot be opened when the switch is closed, preventing misoperation.  
- Mixed compatibility: Supports mixed installation of withdrawable and fixed units, adapting to diverse load requirements.  

3. Busbar and Insulation Design  
- Horizontal busbar: Arranged horizontally at the rear of the cabinet to enhance electric power resistance, with a short-time withstand current of 50–80kA/1s and a peak withstand current of 105–176kA.  
- Vertical busbar: Encapsulated in a high-strength flame-retardant plastic function board, with a rated current of 1000A (2000A for some models), featuring both insulation and arc resistance.  
- Protection class: Standard **IP30/IP40** (higher classes can be customized), effectively preventing dust and foreign objects.  

III. Key Technical Parameters**

IV. Environmental Adaptability and Application Advantages  
1. Operating Environment Requirements  
- Temperature: -5℃～+40℃ (24-hour average ≤35℃);  
- Humidity: ≤50% at 40℃; ≤90% at 20℃ (condensation allowed);  
- Others: No severe vibration or corrosive gas; altitude ≤2000m (standard type).  

2. Core Advantages Compared with Competitors*  
- Convenient maintenance: Drawers support hot-swap replacement, reducing downtime by 60% compared with fixed cabinets (such as GGD).  
- Space efficiency: The same floor area capacity is 18% higher than that of MNS cabinets, and a single cabinet can accommodate up to 22 circuits.  
- Intelligent expansion: Reserved sensor interfaces (temperature, electric quantity) and support for 5G communication module access to realize remote operation and maintenance.  
- Economy: Domestic materials (aluminum-zinc coated sheets) reduce the cost by 35% compared with imported MNS cabinets, and the delivery cycle is shortened to 15 days.  

V. Selection and Operation & Maintenance Suggestions  
1. Selection Considerations:  
   - Short-circuit capacity: If the system short-circuit current ＞25kA, priority should be given to models with 80kA withstand capacity;  
   - Environmental adaptation: For high humidity/high pollution places, it is recommended to choose IP40 or higher protection level;  
   - Intelligent requirements: When reserving communication interfaces, the protocol type (such as Modbus) must be specified.  

2. Key Points for Operation and Maintenance:  
   - Regularly verify the drawer's mechanical interlock and position indicator;  
   - The insulation aging of the vertical busbar area should be checked every 2 years (especially in high-load scenarios).