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Anonymous users2024-02-15Group name: Representative gas or dust.
a Acetylene. b Hydrogen.
c Ethylene. d Propane.
e Metal dust.
f Coal dust.
g Grain dust.
Gas temperature group division:
Temperature Group Safe surface temperature Common ** gases.
T1 450 hydrogen, acrylonitrile, etc. 46 kinds.
T2 300 acetylene, ethylene, etc. 47 kinds.
T3 200 gasoline, butenal, etc. 36 kinds.
T4 135 acetaldehyde, tetrafluoroethylene, etc. 6 kinds.
T5 100 carbon disulfide.
T6 85 Ethyl nitrate and ethyl nitrite.
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Anonymous users2024-02-14EX explosion-proof general mark; d
Structural form, flameproof type; ii
Category, for factories; b
Explosion-proof level, class B. t4
Temperature group, t4
group, the maximum surface temperature.
Temperature group. Constituencies.
Ignition temperature. The maximum allowable surface temperature of the device
ti 450< t
t2iib < mesg<
micr ≤
t. s3 ~&
The order of ignition spark level from lowest to highest is:
a, b, c7 k6
The order of the surface temperature rating from low to high is:
t1t2...t6
CT grade ratio.
BT has a high grade, CT
The range available is the widest, CT
It is acetylene level explosion-proof, etc.
Level. Whereas. bt
It cannot be used for acetylene, only a medium level of explosion protection.
From: Xi'an Electric Machinery Repair Factory.
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Anonymous users2024-02-13The explosion-proof grades of the motor are as follows:
The unprotected motor is not tested without special protection, but it should comply with the regulations.
Motors that protect against solids larger than 50 mm prevent large areas of the human body from accidentally touching or approaching live or rotating parts of the shell. It can prevent solid foreign objects with a diameter of more than 50mm from entering the pants shell.
Motors that protect solids larger than 12mm can prevent solid foreign objects with a diameter of more than 12mm from entering the shell.
Larger-than-solid motors prevent larger-diameter tools or wires from touching the land liquid or approaching live or rotating parts inside the shell.
Motors that protect solids larger than 1 mm prevent wires or strips with a diameter or thickness greater than 1 mm from touching or approaching live or rotating parts within the shell.
The dust-proof motor should withstand splashing water in any direction without harmful effects.
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Anonymous users2024-02-12The explosion-proof level is the same, and the specific T2 can be used depends on the regional environment in which the macro motor is rented, which is related to the ** gas in the poor environment, and the temperature and sparks on the surface of the equipment have nothing to do with it.
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Anonymous users2024-02-11The explosion-proof level is the same, but the temperature group is different, it should be said that T4 is better, and T4 motor has a smaller temperature rise.
Dustproof and waterproof are not the same concept, of course, when underwater, it can be waterproof, and the level of waterproof is high, and of course it is good to be dustproof. >>>More
Flameproof type - D refers to the electrical equipment that encloses the parts that can ignite the ** sex mixture in a shell, which can withstand the ** pressure of the internal ** sex mixture and prevent the explosion of the ** sex mixture around it (advantages: easy to over-target large products, disadvantages: high cost, heavy items, materials: >>>More
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The material of the shell of the explosion-proof motor in the underground coal mine shall be divided into the place of use, and the motor used for the mining face must be made of steel or cast steel, and the available cast iron material for other coal mine sites.