Protection level IP55 means dustproof level 5 (completely prevent the intrusion of foreign objects, although not completely prevent the intrusion of dust, but the amount of dust intrusion will not affect the normal operation of the appliance), waterproof level 5 (anti-low-pressure water spray that lasts at least 3 minutes).
IPIngress Protection abbreviation, translated into Chinese is the meaning of the level of protection, X and Y represent a number, the first number X indicates that the electrical dust, to prevent the intrusion of foreign objects level (here referred to as foreign objects containing tools.
People's fingers and so on can not touch the electric appliances within the charged part, in order to avoid electric shock) the highest level is 6, the second number Y indicates that the electric appliances against moisture, water immersion in the degree of confinement, the highest level is 8, the larger the number means that the higher its level of protection.
Protection level:
1, fire pump control cabinet set up in a special fire pump control room, its protection level should not be less than IP30; and fire water
pump set up in the same space, its protection level should not be less than IP55.
2, fine water mist pump control cabinet (disk) should be arranged in dry, ventilated areas, easy to operate and Inspection and maintenance, its protection level should not be lower than IP54.
3, (1) fire emergency lighting fixtures and evacuation indicator lamps and lanterns set up outdoors or on the ground, the protection level should not be lower than IP67, set up in tunnels, wet places, the protection level should not be lower than IP65, the protection level of the B-type lamps and lanterns should not be lower than IP34.
(2) Emergency Lighting Distribution box, centralized power supply, emergency lighting controller in the tunnel places, wet places, should choose the protection level of not less than IP65 products; in the electrical shaft, should choose the protection level of not less than IP33 products.
4, gas station canopy in the non-explosive hazardous areas under the lamps and lanterns, should be selected protection level of not less than IP44 lighting fixtures.