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Matters Needing Attention

Code of Practice for Operating Explosion-Proof Power Distribution Boxes

Standard 1: Considerations for Explosion-Proof Power Distribution Boxes in Hazardous Environments

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When installing explosion-proof power distribution boxes, it’s crucial to anticipate risks such as spark hazards. This includes:

1. Implementing waterproofing, moisture-proofing, anti-corrosion, and heat-resistant measures, based on relevant professional literature. This involves enhancing the design with waterproof and rainproof features.

2. Addressing potential spark hazards at junctions: Electrical equipment, static electricity, lightning, and electromagnetic radiation pose risks that require personnel with professional electrical knowledge. Beyond initial product stability, ongoing maintenance is key.

3. Proper maintenance and care significantly extend the operational life of equipment. When replacing, repairing, or adjusting electrical devices, it’s essential to reassess the classification of hazardous areas or changes in electrical equipment setups, ensuring that the explosion-proof structure type, grade, and temperature classifications meet new conditions.

4. Operations should be carried out by personnel trained in explosion-proof techniques.

5. Awareness Raising: Given that explosion-proof control boxes are often used in harsh environments, awareness of corrosion risks is vital. Even if the outer casing is made of aluminum alloy, its interaction with airborne chemicals can compromise its integrity. Minor installation errors can impact the equipment’s operational life. Thus, awareness among the installation staff is as crucial as the maintenance carried out at the production site.

Standard 2: Wiring of Explosion-Proof Power Distribution Boxes

Wiring should be carried out in compliance with technical documents provided by manufacturers, such as electrical system diagrams, wiring diagrams, terminal diagrams, and user manuals, tailored to the specific application of the explosion-proof distribution box.

Standard 3: Ensuring Seal Integrity in Cable Wiring

The sealing integrity of the cables entering and exiting the box must be maintained. This includes utilizing explosion-proof putty for sealing, based on the tightness of the cables.

Standard 4: Testing and Counting Mechanisms

After wiring and testing, the control panel, including decimal counters, registers, decoders, and digital displays, should be operational as follows:

Count pulses are directed through the main gate to the decimal counter, which tallies the pulses. After the main gate is closed, the register displays the cumulative pulse count via the decoder.

Quartz crystal oscillators produce precise and stable pulses, used as time bases after frequency division or multiplication. The explosion-proof positive pressure cabinet’s doors should maintain their sealing ability for normal operation.

Standard 5: Grounding Considerations During Installation

Ensure that the grounding wire is connected to a dedicated grounding screw during installation.

In summary, these five points are essential in the installation process of explosion-proof power distribution boxes, including the installation of surge protectors, ammeters, and voltmeters. Proper installation of explosion-proof equipment is crucial for the safe continuation of industrial operations.



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