Protection level, IP is an international protection level symbol (INTERNATIONAL PROTECTION RATINGS), followed by two digits, the first digit represents the dust-proof ability of the device, known as the first characteristic number, the second digital represents the waterproof ability of the device, known as the second characteristic number.
- Classification of explosive hazardous environment: According to the form of explosive substances, explosive hazardous environment can be divided into two categories: gas explosive hazardous environment and dust explosive hazardous environment.
- Zoning of explosive gas environment:
The explosive gas environment is divided according to the frequency, duration and danger degree of explosive gas mixture. That is to say, the explosive gas mixture is divided into different zones according to its continuous or long-term occurrence or short-term occurrence.
The explosive gas environment is divided into three dangerous zones:
(1) Zone 0: Continuous or long-term occurrence of explosive gas mixtures;
(2) Zone 1: An environment in which explosive gas mixtures may occur during normal operation;
(3) Zone 2: An environment in which explosive gas mixtures are impossible to occur in normal operation, or where explosive gas mixtures exist only for a short time, even if they occur.
- IP protection level test introduction:
IP is the abbreviation of Ingress Protection.
Protective-level systems such as IP provide a way to classify products by their dust, waterproof and collision-proof degree of electrical equipment and packaging. This system has been approved by most European countries and drafted by the International Electrotechnical Commission (IEC).
The protection level is usually expressed by two numbers followed by IP, which are used to define the protection level.
- Numbers indicate the range of dust resistance of the equipment, or the extent to which people are protected from hazards in a sealed environment. I stands for the level of preventing solid foreign bodies from entering.
The second word indicates the degree of waterproofing of the equipment. P stands for the level of water intake prevention, and the most is 8.
- Classification requirements of IP protection level:
IPXX Dust-proof and Waterproof Grade
Dust-proof grade (* denoted by X)
0: No protection
1: Prevent large solid intrusion
2: Prevent medium-sized solids from intruding
3: Prevent small solids from intruding
4: Prevent the entry of solids larger than 1mm
5: Prevent harmful dust accumulation
6: Completely prevent dust from entering
Waterproof grade (second X)
0: No protection
1: Dropping water into the shell has no effect.
2: When the enclosure tilts to 15 degrees, the droplets drop into the enclosure without affecting the enclosure.
3: Water or rain from a 60 degree corner to the shell has no effect
4: The liquid poured from any direction to the shell has no harmful effect.
5: Rinse with water without any harm.
6: Can be used in the cabin environment
7: It can withstand immersion (1m) in a short time.
8: Immerse in water for a long time under certain pressure
Example: The IP protection level of the display instrument is marked IP65, indicating that the product can completely prevent dust from entering and can be washed with water without any harm.