In order to protect the dust, solid foreign matter and water into the light cavity, touch or accumulate on the live parts to produce jump fire, short circuit or damage electrical insulation and other dangers, there are a variety of shell protection to protect the role of electrical insulation. With the characteristic letter "IP" followed by two numbers to characterize its shell protection level. The first number indicates the protection against people, solid foreign objects or dust. Explosion proof light is a kind of sealed lamps and lanterns, its dustproof ability is at least 4 levels, the second number indicates the protection ability of water, divided into 0-8 levels.
Explosion proof sign composition and meaning
01
Explosion proof mark EX - indicates that the equipment is explosion-proof electrical equipment.
02
Explosion-proof structure form - indicates that the device uses what measures for explosion-proof, such as d for explosion-proof, p for positive pressure; i for intrinsically safe, etc..
03
Explosion-proof equipment category - divided into two categories, I for underground coal mine electrical equipment, II for factory electrical equipment.
04
Explosion-proof level - divided into A, B, C three levels, indicating the strength of its explosion-proof capacity.
05
Temperature group - divided into T1 ~ T6 six groups, indicating the maximum allowable surface temperature of the device.
Zhongtong Intelligence || The structure type and protection level of explosion-proof lamps and lanterns
Such as: explosion-proof mark for EXdIIBT4, the meaning of
EX - Explosion-proof general sign.
d - structure form, explosion-proof.
II - category, for factory use.
B - explosion-proof level, class B
T4 - temperature group, T4 group, the highest surface temperature ≤ 135 ℃.
