Shenhai Explosion-Proof
Different types of explosion-proof electrical equipment necessitate distinct casing protection standards. These standards, known as protection grades, denote the casing’s capability to block external objects from penetrating its interior and to provide resistance against water ingress. According to the “Degrees of Protection Provided by Enclosures (IP Code)” (GB4208), a casing’s protection grade is denoted by the IP code. This code comprises the initials IP (International Protection), followed by two numerals and sometimes optional additional letters (which are occasionally omitted).
| Number | Protection range | Explain |
|---|---|---|
| 0 | Unprotected | No special protection against water or moisture |
| 1 | Prevent water droplets from soaking in | Vertically falling water droplets (such as condensate) will not cause damage to electrical appliances |
| 2 | When tilted at 15 degrees, water droplets can still be prevented from soaking in | When the appliance is tilted vertically to 15 degrees, dripping water will not cause damage to the appliance |
| 3 | Prevent sprayed water from soaking in | Prevent rain or damage to electrical appliances caused by water sprayed in directions with a vertical angle of less than 60 degrees |
| 4 | Prevent splashing water from entering | Prevent water splashing from all directions from entering electrical appliances and causing damage |
| 5 | Prevent sprayed water from soaking in | Prevent low-pressure water spraying that lasts for at least 3 minutes |
| 6 | Prevent large waves from soaking in | Prevent excessive water spraying that lasts for at least 3 minutes |
| 7 | Prevent water immersion during immersion | Prevent soaking effects for 30 minutes in water up to 1 meter deep |
| 8 | Prevent water immersion during sinking | Prevent continuous soaking effects in water with a depth exceeding 1 meter. The accurate conditions are specified by the manufacturer for each device. |
The first numeral indicates the degree of protection against solid objects, while the second numeral represents the water resistance level. Protection against solid objects ranges across 6 levels: level 0 signifies no protection, and level 6 indicates complete dust-tightness, with protection increasing progressively from 0 to 6. Similarly, water protection spans 8 levels: level 0 denotes no protection, and level 8 indicates suitability for prolonged submersion, with protection increasing progressively from 0 to 8.