Is the explosion-proof grade and protection grade of explosion-proof motor the same thing
The parameters of explosion-proof motors are generally: explosion-proof grade, protection grade, green grade, etc., explosion-proof grade refers to the washing type of explosion-proof structures of various electrical equipment in different explosive gas environments and dangerous areas, such as Exd1BT4, and protection grade refers to the waterproof and dustproof grade of electrical equipment such as motors. For example, IP55. Sometimes it is easy to confuse the explosion-proof level with the protection level, so let's talk about the meaning and difference between the explosion-proof level and the protection level:
1, motor explosion-proof grade
The explosion-proof grade of the motor consists of three parts:
(1) In the explosive gas area (zone 0, zone 1, zone 2) the use of different electrical equipment safety level division. Such as explosion-proof motor selection is divided into flameproof type (code d) positive pressure type (p), increased safety type (e), n type
(2) The classification of gas or vapor explosive mixture grades, divided into A, TB, TC three kinds, these grades are mainly divided according to the maximum test safety gap (MESG) or minimum ignition current (MICR) to distinguish.
(3) The temperature grouping of igniting a medium is mainly divided into T1-450C <T, T2-300 <Ts 450%, T3-200 <Ts300°C, T4.135< Ts200°C, T5-100 < Ts135, T6-85 Ts100°C
2, motor protection level:
The protection grade of explosion-proof motor under normal conditions is IP55. It can also be made into IP65 and other protection grade motors according to the special needs of users. The symbol of the protection level consists of the letter "IP" and two symbolic numbers appended after it. Examples are as follows:
(1) The first characteristic digit indicates the protection level of the shell to the person and the shell interior. The meaning of numbers:
0. No protection motor without special protection is not tested.
1. The motor with solid protection greater than 50MM can prevent a large area of the human body from accidentally touching or approaching the charged or rotating parts in the shell. It can prevent solid foreign bodies with a diameter greater than 50MM from entering the shell
2. The motor with solid protection greater than 12MM can prevent solid foreign bodies with a diameter greater than 12MM from entering the shell
3. A solid motor with a protection greater than 2.5MM can prevent tools or wires with a diameter greater than 2.5MM from touching or approaching live or rotating parts in the shell
4. A motor with solid protection greater than 1MM can prevent guides or strips with a diameter or thickness greater than 1MM from touching or approaching live or rotating parts in the shell 5. Dust-proof motor withstand any direction of the splash should have no harmful effects
(2) The second representative number indicates the level of protection due to harmful effects caused by water intake of the enclosure. The meaning of the numbers :0. No protection motor without special protection
1. The vertical dripping of the drip-proof motor should have no harmful effects
When the motor is tilted from its normal position in any direction to any Angle within 15 degrees, there should be no harmful effect of vertical dripping 3. There should be no harmful effect on the drenching in the range of 60 degree Angle between the drenching motor and the cover
4. Anti-splash machine, the splash in any direction next to the construction should have no harmful effect
5. The anti-spray motor should have no harmful effects when it is sprayed in any direction
6. When the anti-wave motor is subjected to violent wave impact or strong water spray, the water intake of the motor should not reach harmful levels.
7. Waterproof motor When the motor is immersed in the specified pressure of water after the specified time, the amount of water into the motor should not reach the harmful degree
8. Submersible motor The motor can dive for a long time under the conditions specified by the manufacturer. The motor is generally watertight, so water can also be allowed to enter some types of motors, but it should not reach a harmful degree.
Summary: The explosion-proof grade is set for the use of explosion-proof motors, and different explosion-proof motors with different explosion-proof grades are used in
