I. Key Installation Points
1. Pre-Installation Preparation: Don't Lose at the Starting Line
Equipment Identity Verification: The first thing to do upon receiving the equipment is to verify that its explosion-proof marking (e.g., Ex d IIC T6 Gb) matches the hazard level of your location, and confirm that the explosion-proof certificate is valid.
Location Planning: The lens should be protected from direct sunlight and obstructions from pipes. The installation location should be as far away as possible from leaks and high-temperature equipment, and sufficient maintenance space should be provided.
Dedicated Tools and Accessories: Spark-free tools (such as brass wrenches) must be used. Cable protection conduits, explosion-proof junction boxes, sealing rings, and other accessories must also be explosion-proof certified products; ordinary materials cannot be substituted.
2. Installation Process: Several Critical "High-Voltage Lines"
Strictly Maintain Cable Inlet Sealing: This is the most critical step. Cable inlets must be sealed with the equipment's own rubber sealing ring; do not use sealing putty, asbestos rope, etc. as substitutes. Any excess cable inlets must remain blind-plugged as they were at the factory and tightened securely. Structural Modification Prohibited: Drilling and welding on the explosion-proof casing are strictly prohibited. Screws must not be replaced or gaskets removed arbitrarily. Internal wiring and components must not be modified without authorization.
Reliable Grounding and Lightning Protection: The equipment must be reliably grounded using a yellow-green wire. The grounding resistance is generally required to be ≤4Ω (stricter requirements apply in coal mines and other areas, ≤2Ω). When installed outdoors at high altitudes, a dedicated explosion-proof lightning arrester must be installed.
Standardized Wiring: Signal lines must be run in separate conduits from high-power power lines, maintaining a distance of at least half a meter to prevent interference. Explosion-proof flexible conduits must be used when connecting equipment, and the connections must be tightened securely.
The installation process can be summarized as follows: Secure the base → Install the explosion-proof flexible conduit and safety rope → Connect to the explosion-proof junction box (internal wiring) → Tighten all sealing bolts → Fine-tune the mirror angle (slightly tilt downwards). II. Post-Maintenance Guidelines
1. Three-fold Protection for Routine Maintenance
Moisture-proof, dust-proof, and corrosion-proof: Dust and oil stains, which are corrosive, will adhere to the explosion-proof cover and glass surface. The lens and housing must be wiped regularly with anhydrous alcohol swabs to ensure clarity.
Regular Inspections are Essential:
Monthly: Check for loose bolts, aging seals, and rust on the housing.
Yearly: Conduct a comprehensive explosion-proof performance test. Record all equipment data from installation to disposal, documenting every maintenance step.
2. Two "Deadly Commands" for Maintenance
Never Open the Cover While Powered: In explosion-hazardous areas, before maintenance or opening the housing, disconnect the power supply and display a "Personnel Working, Do Not Power On" warning sign. Never schedule power restoration.
Protect the Explosion-Proof Surface: If the explosion-proof housing is opened, the removed explosion-proof surface must be placed upwards and not in direct contact with the ground. After the inspection is completed, the explosion-proof surface must be coated with 204 anti-rust oil or phosphating paste before it can be replaced.
