A cooling fan IP protection grade is introduced

IP（ 进入保护) Protection grade system is by IEC ( 国际电工委员会) The draft. Electric appliance according the characteristic of the dust-proof and moisture to be graded. Here refers to foreign object contains tools, man's fingers are not in contact with the electrical appliances within the live part, in order to avoid electric shock. In a cooling fan industry, often have the customer needs to dustproof moisture-proof function, and according to the different environment, choose a different IP rating. R 5 e - such as commonly used The level of 230 b can be done to IP54. Taiwan letter bay of some products can reach a higher level of IP55.

IP protection grade is composed of two Numbers, the first digital representation from the dust of lamps and lanterns, the level of the external things out, the second the figures show that the moisture proof, waterproof lamps and lanterns into airtight degree, the greater the number said the higher degree of protection. Two marked number represents protection grade as shown in table 1 and table 2:

table 1: the first marked feature number ( Number) Referred to in the protection degree

0 no protection to people or things no special protection from the outside.

1 invasion more than 50 mm solid objects to prevent the human body, Like the palm of your hand) Due to accidental access to the internal parts of lamps and lanterns. Prevent the larger, Diameter greater than 50 mm) The external things of invasion.

2 invasion more than 12 mm solid objects to prevent human fingers touch the internal parts of lamps and lanterns to prevent medium size ( Large diameter 12 mm) The external things of invasion.

3 prevent greater than 2. Solid objects into prevent diameter or thickness of 5 mm larger than 2. 5 mm tools, electrical, or similar small objects into the details of and access to the internal parts of lamps and lanterns.

4 to prevent greater than 1. 0 mm solid objects into prevent diameter or thickness is greater than 1. 0 mm tools, electrical, or similar small objects into the details of and access to the internal parts of lamps and lanterns.

5 dust invasion external things completely, cannot completely prevent dust to enter, but into the amount of dust will not affect the normal work of the lamps and lanterns.

6 dust completely prevent outside intrusion, and can completely prevent dust entering.

table 2: the second marked feature number ( Number) Referring to protective degree

0 no protection, no protection.

1 to prevent water invasion of vertical drop of water droplets ( If the condensate) The lamps and lanterns is not cause harmful effects.

2 tilt 15 degrees still can prevent water intrusion when lamps and lanterns from vertical inclined to 15 degrees, dripping of lamps and lanterns is not cause harmful effects.

3 to prevent spray water into rain, or prevent and the direction of the vertical Angle is less than 60 degrees by spraying water into the damage of lamps and lanterns.

4 prevent splash water intrusion prevent various directions of water into the damage of lamps and lanterns.

5 prevent injection of water into the jet of water from the nozzle to prevent their each direction into the damage of lamps and lanterns.

6 invasion of the big waves installed on the deck of lamps and lanterns, prevent into the damage by waves of invasion.

7 lamps and lanterns of invasion of the immersed in water immersion time in the water or water pressure under certain standards to ensure that no damage caused by water.

8 invasion of the sinking water indefinitely the sinking of the lamps and lanterns in the specified hydraulic conditions, to ensure that no damage caused by water.

in addition to the above 2 digits, there are two optional letters:

additional letters: keep close to the dangerous part

A hand, fingers, B C tools, D wire,

add letters: specially added information

H high voltage equipment, M do waterproof test sample run, S when do waterproof test sample static, W climate conditions attached A ADDA IP rating given to

sketch, can be more intuitive to see the level of these characteristics