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TheDifferenceBetweenExplosion-ProofLevelandProtectionLevel|TechnicalSpecifications

Technical Specifications

The Difference Between Explosion-Proof Level and Protection Level

Many customers often inquire about the specific parameters of protection and explosion-proof levels when purchasing explosion-proof products. However, these crucial aspects are frequently overlooked, leading to widespread confusion between the two concepts. Today, let’s clarify the distinct differences between the protection level and explosion-proof level:

explosion proof level and protection level
Explosion-Proof: This term refers to the classification level of electrical equipment used in hazardous areas.
Protection: Relates to water and dust resistance.

Explosion-Proof Level:

For example, the explosion-proof symbol “Ex (ia) IIC T6” signifies:

Logo contentSymbolMeaning
Explosion proof declarationExMeets certain explosion-proof standards, such as China's national standards
Explosion proof methodiaAdopting IA level intrinsic safety explosion-proof method, it can be installed in Zone 0
Gas categoryIICPromised to involve IIC explosive gases
Temperature groupT6The surface temperature of the instrument shall not exceed 85 ℃

Protection Level:

For instruments used in explosive hazard zones, it’s essential to specify the protective level of their enclosures. This is represented by the IP rating.

The first level of protection prevents human contact with live and moving parts inside the enclosure, as well as the ingress of solid objects.

The second level of protection safeguards against harmful effects caused by water entering the product.

The first digit after “IP” indicates the level of dust protection.

NumberProtection rangeExplain
0UnprotectedNo special protection for external people or objects
1Prevent solid foreign objects with a diameter greater than 50mm from enteringPrevent the human body (such as the palm) from accidentally coming into contact with internal electrical components, and prevent larger external objects (with a diameter greater than 50mm) from entering
2Prevent solid foreign objects with a diameter greater than 12.5mm from enteringPrevent human fingers from touching internal parts of electrical appliances and prevent medium sized (diameter greater than 12.5mm) foreign objects from entering
3Prevent solid foreign objects with a diameter greater than 2.5mm from enteringPrevent tools, wires, and similar small foreign objects with a diameter or thickness greater than 2.5mm from invading and coming into contact with internal parts of electrical appliances
4Prevent solid foreign objects with a diameter greater than 1.0mm from enteringPrevent tools, wires, and similar small foreign objects with a diameter or thickness greater than 1.0mm from invading and coming into contact with internal parts of electrical appliances
5Prevent external objects and dustCompletely preventing foreign objects from entering, although it cannot completely prevent dust from entering, the amount of dust intrusion will not affect the normal operation of the electrical appliances
6Prevent external objects and dustCompletely prevent the intrusion of foreign objects and dust

The second digit signifies the level of water protection.
NumberProtection rangeExplain
0UnprotectedNo special protection against water or moisture
1Prevent water droplets from soaking inVertically falling water droplets (such as condensate) will not cause damage to electrical appliances
2When tilted at 15 degrees, water droplets can still be prevented from soaking inWhen the appliance is tilted vertically to 15 degrees, dripping water will not cause damage to the appliance
3Prevent sprayed water from soaking inPrevent rain or damage to electrical appliances caused by water sprayed in directions with a vertical angle of less than 60 degrees
4Prevent splashing water from enteringPrevent water splashing from all directions from entering electrical appliances and causing damage
5Prevent sprayed water from soaking inPrevent low-pressure water spraying that lasts for at least 3 minutes
6Prevent large waves from soaking inPrevent excessive water spraying that lasts for at least 3 minutes
7Prevent water immersion during immersionPrevent soaking effects for 30 minutes in water up to 1 meter deep
8Prevent water immersion during sinkingPrevent continuous soaking effects in water with a depth exceeding 1 meter. The accurate conditions are specified by the manufacturer for each device.

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