The equipment requirements for an explosion-proof electric hoist trajectory system are critical to ensuring safety and operational reliability in hazardous environments. Below are the key requirements and considerations:

1. Explosion-Proof Design and Certification

Certification Standards: The hoist and trajectory system must comply with relevant explosion-proof standards, such as ATEX (for Europe), IECEx (international), or NEC/CEC (for North America). The equipment should be certified for use in the specific hazardous zone (e.g., Zone 1, Zone 21) and gas/dust group (e.g., IIA, IIB, IIC for gases; Group III for dusts).

Enclosure Type: The hoist and trajectory components should be housed in explosion-proof enclosures (e.g., flameproof "d", increased safety "e", or intrinsic safety "i") to prevent the ignition of explosive atmospheres.

2. Material Selection

Non-Sparking Materials: All components that may come into contact with each other or with the environment should be made of non-sparking materials (e.g., brass, stainless steel, or coated surfaces) to minimize the risk of ignition.

Corrosion Resistance: Materials should be resistant to corrosion, especially if the environment contains corrosive gases or chemicals.

3. Electrical Safety

Cable Management: Cables should be armored or routed in explosion-proof conduits to prevent damage and ignition sources.

Grounding and Bonding: Proper grounding and bonding of all metallic parts to prevent static discharge.

Overload Protection: The hoist should be equipped with overload protection devices to prevent overheating and potential ignition sources.

4. Mechanical Safety

Limit Switches: The hoist should be fitted with explosion-proof limit switches to prevent overtravel and mechanical damage.

Braking System: A reliable braking system should be in place to ensure safe operation and prevent uncontrolled movement.

Lubrication: Lubricants used should be non-flammable and suitable for the operating temperature range.

5. Environmental Conditions

Temperature Rating: The equipment should be rated for the ambient temperature range of the hazardous area, including any potential temperature rises due to operation.

Humidity and Moisture: The hoist and trajectory system should be designed to operate in environments with high humidity or moisture, with appropriate sealing and protection.

6. Installation and Maintenance

Qualified Personnel: Installation and maintenance should be carried out by personnel trained in explosion-proof equipment.

Regular Inspections: The system should be regularly inspected and maintained to ensure continued compliance with explosion-proof standards.

7. Documentation and Labeling

Clear Labeling: The hoist and trajectory system should be clearly labeled with explosion-proof certification marks, hazard zone ratings, and other relevant information.

Manuals and Guides: Comprehensive manuals and safety guides should be provided, detailing installation, operation, and maintenance procedures.

8. Emergency Stop and Control

Emergency Stop: The system should include explosion-proof emergency stop buttons to quickly halt operation in case of an emergency.

Remote Control: If remote control is used, it should be explosion-proof and comply with relevant standards.

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