Environmental Conditions for Explosion-Proof Electric Hoist Electrical Appliances

Temperature and Humidity:

The operating environment temperature should generally be between -20°C and +40°C.

Relative humidity should not exceed 85% (at 25°C).

If the altitude exceeds 1000 meters or the temperature exceeds 40°C, specific adjustments should be made according to relevant standards (e.g., GB755).

Ventilation:

The environment should have good ventilation to prevent the accumulation of explosive gases or dust.

Explosion-Proof Zones:

In explosive gas environments, the hoist should operate in Zone 1 or Zone 2 as defined by GB3836.14-2000.

In combustible dust environments, it should operate in Zone 21 or Zone 22 as defined by GB12476.3-2007.

Principles for Selecting Electrical Appliances for Explosion-Proof Electric Hoists

Explosion-Proof Type and Classification:

Select electrical appliances based on the explosion-proof zone and the nature of the hazardous substances.

Ensure the electrical appliances have appropriate explosion-proof markings (e.g., "Ex") and are certified by national explosion-proof inspection units.

Temperature Group and Surface Temperature:

The maximum surface temperature of electrical appliances should not exceed the ignition temperature of any explosive gases or vapors present.

Match the temperature group of the electrical appliances with the explosive environment.

Material and Construction:

Use non-sparking materials for components that may come into contact with each other during operation.

Ensure all electrical parts are housed in explosion-proof enclosures to prevent the escape of sparks or overheating.

Connection and Cabling:

Use heavy-duty rubber-sheathed copper-core multi-strand cables with a grounding core.

The grounding core should be reliably connected to the grounding terminal in the junction box.

Avoid joints in the cables; if necessary, use explosion-proof junction boxes.

Safety Devices:

Include overload protection, limit switches, and emergency stop buttons.

For explosive gas environments, use flameproof brakes; for combustible dust environments, install brakes in dust-tight enclosures.

Environmental Adaptability:

Consider chemical, mechanical, thermal, electrical, and moisture effects on the electrical appliances.

Ensure the electrical appliances can withstand the specific environmental conditions of the workplace.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment