Ventilated positive pressure explosion-proof electrical control cabinet application range:

Explosion-proof positive pressure ventilation distribution boxes are suitable for environments with hazardous gases or dust, such as chemical industries, offshore drilling platforms, metallurgy, light industry, textiles, food, biotechnology, and others. They are used as power supply for three-phase four-wire (380V/220V) AC low-voltage electrical distribution systems, or for monitoring and controlling elements like detection instruments, analytical instruments, microcomputer touch screens, and high-power variable-frequency drives.

2. Suitable for hazardous areas in Zones 1 and 2.

3. Suitable for hazardous gas environments classified as IIA, IIB, IIC, with temperature groups T1-T4.

4. Indoor and outdoor installation.

Technical Principle of Ventilated Positive Pressure Explosion-Proof Electrical Control Cabinet

Utilize explosion-proof measures with medium-isolation ignition sources. That is, install the electrical components used by the user within a cabinet filled with clean, positive-pressure gas. This prevents flammable and explosive mixtures in the external environment from coming into contact with the electrical sparks or hazardous temperatures generated by the components during normal operation, thereby achieving the goal of electrical explosion-proofing.

Ventilation-type positive pressure explosion-proof electrical control cabinet product features:

1. This product is mainly composed of the cabinet, an automatic control system, a gas-supplying system, an alarm system, and a power distribution system; the cabinet consists of a positive pressure chamber and a secondary chamber, with the positive pressure chamber housing the user's power distribution system components and the secondary chamber containing the automatic control system.

2. Cabinet products feature GGD cabinet frames, with the main and auxiliary plates in a left-right configuration. The cables are installed in a trench seat, with entry from below, operation via the front door, and maintenance through the rear door.

3. Boxed products feature high-quality steel plate welding structure, with the main and auxiliary plates in an up-down configuration, mounted horizontally, with line entry at the bottom, front door operation, and maintenance access.

4. The piano stand-style products are made from high-quality steel plates, folded and welded into shape. The main and auxiliary disks are in a front and rear structure, mounted in a pedestal style, with line entry from below, piano stand operation, and rear door for maintenance.

5. Divided into ventilation and compensation types based on the intake method. The ventilation type provides continuous gas supply without interruption, allowing the working heat of the components inside the positive pressure chamber to be carried away through the gas circuit, offering excellent heat dissipation capabilities. It is suitable for addressing the heat dissipation issues of high-power explosion-proof variable-frequency inverters. The compensation type, on the other hand, supplies gas intermittently, requiring the positive pressure chamber to have good sealing to ensure minimal gas consumption.

6. Customers must provide a gas source, which should be purified air or nitrogen, with a pressure of 0.2～0.8Mpa; typically, the instrument air at the customer's site can meet the requirements.

7. Steel plate materials generally use GB710-88 cold-rolled steel plates, or stainless steel materials according to GB3280-84, as per customer requirements.

Ventilation-type Positive Pressure Explosion-proof Electrical Control Cabinet Ordering Instructions:

This series of explosion-proof control boxes requires customers to provide specific electrical schematics or wiring diagrams upon ordering. Our company will select the corresponding casing specifications based on customer requirements, issue the corresponding technical proposal for customer confirmation, and then proceed with production.

Please specify detailed model numbers, specifications, explosion-proof markings, and quantities when placing an order.

If the brand of the internal components is not consistent with our company's standard, it must be noted when placing the order.

The components inside this product can also be provided by the customer to meet the explosion-proof standard requirements.

South Defense Meirun specializes in manufacturing: explosion-proof control boxes, explosion-proof control cabinets, explosion-proof electrical control boxes, explosion-proof electrical equipment control boxes, explosion-proof electrical control units, explosion-proof electrical control cabinets, BXK explosion-proof control boxes, explosion-proof button control boxes, stainless steel explosion-proof control boxes, explosion-proof power supply control boxes, explosion-proof corrosion-resistant control boxes, explosion-proof instrument control boxes, explosion-proof valve control boxes, PLC explosion-proof control boxes, dust explosion-proof control boxes, explosion-proof touch screen control boxes, aluminum alloy explosion-proof control boxes, positive pressure explosion-proof electrical control cabinets, explosion-proof booths, etc.