Frequency Converter Explosion-Proof Pressurized Cabinet Power Distribution Box Control Box

Scope of Application

1. Suitable for hazardous areas in gas environments Zone 1 and Zone 2;
2. Suitable for gas environments of Class IIA, IIB, IIC;
3. Suitable for combustible dust environments Zone 20, Zone 21, Zone 22;
4. Suitable for environments with temperature classes T1 to T6;
5. This product is applicable in industries such as petrochemicals, offshore drilling platforms, metallurgy, pharmaceuticals, light industry, textiles, brewing, paints, coatings, food, bioengineering, aerospace engineering facilities, etc.;

Product Features

1. The explosion-proof pressurized cabinet mainly consists of the cabinet body, automatic control system, gas distribution system, alarm system, and power distribution system; the cabinet body is composed of a positive pressure chamber and an auxiliary chamber. The positive pressure chamber houses the user's power distribution system components, while the auxiliary chamber contains the automatic control system.
2. The cabinet-type explosion-proof pressurized cabinet adopts the "Ergong Explosion-Proof" frame structure, with the main and auxiliary panels arranged in left-right, top-bottom, or console-style configurations. It is installed via cable trench base, with bottom entry for wiring, front door operation, and maintenance access from the front or rear door.
3. The box-type explosion-proof pressurized cabinet is made of high-quality steel plate or stainless steel welded structure, with the main and auxiliary panels arranged in a top-bottom configuration. It is mounted as a hanging unit, with bottom entry for wiring, and front door operation and maintenance.
4. The console-type explosion-proof pressurized cabinet is formed by folding and welding high-quality steel plates, with the main and auxiliary panels arranged in a front-back structure. It is base-mounted, with bottom entry for wiring and console operation.

5. The explosion-proof pressurized cabinet is divided into ventilation type and compensation type based on the air intake method. The ventilation type provides continuous uninterrupted air supply, allowing the heat generated by components in the positive pressure chamber to be carried away by the airflow, offering excellent heat dissipation. It is suitable for addressing the heat dissipation issues of high-power explosion-proof frequency converters. The compensation type provides intermittent air supply, requiring the positive pressure chamber to have good sealing to ensure low air consumption.
6. Users must provide the air source for the explosion-proof pressurized cabinet, which should be: purified air or nitrogen, with an air source pressure of 0.2–0.8 MPa. Typically, the instrument air available at the user's site can meet this requirement.
7. The steel plate material for the explosion-proof pressurized cabinet is generally GB710-88 cold-rolled steel plate, but GB3280-84 stainless steel material can also be used based on user requirements.

Frequency Converter Explosion-Proof Pressurized Cabinet Power Distribution Box Control Box

Technical Parameters

Explosion-proof marking: ExdeIIBT4/T5/T6, ExdeIICT4/T5/T6, DIPA20TA,T4/T5/T6;
Rated voltage: AC220/380V, non-standard voltages: 12V/24V/36V/127V/660V;
Main switch current: 10A–800A; branch switch current: 1A–630A;
Protection level: IP54/IP55/IP65;
Thread specification: DN15-DN100/G1/2-G4 inch
Inlet wire specification: diameter 6mm–80mm; outlet wire specification: diameter 6mm–80mm;
Inlet and outlet direction: top entry top exit, bottom entry bottom exit (can be customized as per customer requirements without restrictions)

Explosion-Proof Principle
The explosion-proof pressurized cabinet adopts the explosion-proof measure of isolating the ignition source with a medium. Specifically: the electrical components used by the customer are installed in a cabinet filled with positive pressure clean gas, preventing flammable and explosive mixed gases in the external environment from coming into contact with the electric sparks or hazardous temperatures generated during normal operation of the electrical components, thereby achieving the purpose of electrical explosion protection.