IP stands for Ingress Protection. The IEC IP protection level is an important criterion for evaluating the safety protection of electrical equipment. The IP protection level system provides a standard for evaluating products based on the degree of dust, water and collision resistance of electrical equipment and packaging. Classification method, this system has been recognized by most European countries, drafted by the International Electro technical Association IEC, and announced in IEC529 (BS EN 60529: 1992) outer packaging protection class (IP code).

The protection level is usually expressed by two numbers followed by IP, and the numbers are used to clarify the level of protection. The first number indicates how well a device is resistant to fine dust, or how well people are protected from hazards in a sealed environment. I stands for the level of protection against ingress of solid foreign objects, with the highest level being 6; the second number indicates how waterproof the device is. P represents the level of water protection, the highest level is 8. For example, the protection level of the motor is IP65, the protection level is IP55 and so on.

Degree of protection against contact with electrical equipment and protection against foreign objects (first number) Degree of protection against water for electrical equipment (second number). The first number is the dust protection range and the second number is the water protection range.