Lighting knowledge - — IP protection class definition

IP（ 国际保护) Protection grade system is by IEC ( 国际电工委员会) The draft. According the characteristic of the dust-proof and moisture to the lamp. Here refers to foreign object contains tools, man's fingers are not in contact with the lamps and lanterns of charged part, in order to avoid electric shock. 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 swallow words said the higher their level of protection, two marked number represented by protection grade as table 1 and table 2. Table 1:

the first marked characteristics number ( Number) Referred to the protective degree

a: in the table marked the first number level prevention and other fixed meaning 0 no protection to the outside world in people or things without special protective 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 to 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. The content into 5 dustproof prevent completely, although not completely prevent dust from entering the, 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 from entering the

table 2: the second marked feature number ( Number) Referred to in the protection degree

the second label digital proofing and other level set righteousness 0 no protective no protective prevent drip into vertical drop of water droplets (1 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, drop 3 to prevent harmful effects on the lamps and lanterns is not spraying 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. May prevent injection water invasion to prevent from the direction of the damage caused by a nozzle injection of water into the lamps and lanterns. Invasion of the big wave 6 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. Eight lamps and lanterns of invasion of the sinking water indefinitely, sunk in a specified pressure condition, to ensure that no damage caused by water.

editor: China lighting network liu