The classification of protection levels for explosion-proof electric hoists can be mainly explained from the following aspects:

1、 Explosion proof grade

The explosion-proof rating of explosion-proof electric hoists is one of their most important protective features, usually classified according to relevant international or national standards. For example, according to the European standard ATEX, explosion-proof levels may include EX II CT4, etc., which indicate the safety and suitability of the equipment for use in specific explosive environments.

2、 Protection level (IP level)

In addition to explosion-proof rating, explosion-proof electric hoists also have protection rating (IP rating), which is used to describe their dustproof and waterproof performance. The IP rating consists of two digits, the first digit representing the dustproof rating and the second digit representing the waterproof rating. For example, IP66 protection indicates that the device has complete dust resistance and can operate normally under strong water spray conditions.

3、 Classification criteria

The protection level classification of explosion-proof electric hoists usually follows the following standards or specifications:

International Electrotechnical Commission (IEC) standards, such as the IEC 60079 series of standards, are specifically used to describe the design and manufacturing requirements for electrical equipment in explosive environments.

European standards (EN), such as EN 60529/IEC 529, are used to describe the protection level of electrical equipment.

National standards: Different countries may have their own classification standards for the protection level of explosion-proof electric hoists, such as China's GB 3836 series standards.

4、 Specific classification

Although it is not possible to directly provide a specific classification table for the protection levels of all explosion-proof electric hoists, they can be summarized based on the general principles of the above standards:

Explosion proof level: Classified according to the usage area of the equipment in explosive gas environments (such as Zone 1, Zone 2) and explosive dust environments (such as Zone 21, Zone 22).

Protection level (IP level):

Dust proof level: from 0 to 6, the larger the number, the stronger the dust proof ability.

Waterproof rating: from 0 to 8 (or 9, but less commonly), the larger the number, the stronger the waterproof ability.

5、 Application examples

Taking a certain brand of explosion-proof electric hoist as an example, it may have the following classification characteristics of protection levels:

Explosion proof grade: EX II CT4, suitable for explosive gas environments in Zone 1 and Zone 2.

Protection level: IP66, with complete dust-proof and strong water spray protection capabilities.

6、 Precautions

When choosing an explosion-proof electric hoist, the appropriate explosion-proof level and protection level should be determined based on the type, concentration, and temperature of explosive gases or dust in the actual working environment.

There may be differences in the protection level of explosion-proof electric hoists of different brands and models, so when selecting, the technical parameters and performance indicators of each product should be carefully compared.

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