Explosion-proof motor grade classification

In the production of today, many places of production will produce certain combustible material. About 2/3 of underground coal mines are explosive substances, chemical industry, about 80% of the workshop area is explosive material. Oxygen: oxygen in the air is ubiquitous.

在生产过程中大量使用电气仪表，各种磨擦的电火花 , 机械磨损火花、静电火花、高温等不可避免，尤其当仪表、电气发生故障时。 客观上很多工业现场满足爆炸条件。当爆炸性物质与氧气的混合浓度处于爆炸极限范围内时，若存在爆炸源，将会发生爆炸。因此采取防爆就显得很必要了。

In the production process of a large number of electrical instruments, various friction electrical discharge, mechanical wear sparks, electrostatic sparks, high temperature, etc., especially when the instrument, electrical failure. Objectively, many industrial sites meet the explosive conditions. When explosive substances and oxygen concentrations in the explosive range of the explosion, if there is explosive source, will explode. So it's necessary to take explosion-proof..

电机按防爆原理可分为隔爆型电机、增安型电机、正压型电机、无火花型电机及粉尘防爆电机等。

Motor according to explosion-proof principle can be divided into the explosion-proof motor, the increased safety motor, the positive pressure motor, no spark motor and dust explosion-proof motor, etc..

电机防爆等级由3部分构成

Motor explosion-proof level is composed of 3 parts

1)气体或蒸气爆炸性混合物等级的划分，分为ⅡA、ⅡB、ⅡC三种，这些等级的划分主要是依照最大试验安全间隙（MESG）或最小点燃电流（MICR）来区分的。

1) gas or vapor explosion mixture grade is divided into II A, II B, II C three. Division of these grades is mainly in accordance with the maximum experimental safe gap (MESG) or the minimum ignition current (MICR) to distinguish.

2)引燃某种介质的温度分组的划分。主要分为T1－450℃<T、T2－300<T≤ 450℃、 T3－200<T≤300℃、 T4－135<T≤200℃、 T5－100<T≤135 、 T6－85<T≤100℃.

2) into a medium of ignition temperature group. Can be divided into T1450 DEG C <T, T2300<T is equal to or less than 450 DEG C, T3200<T is less than or equal to 300 DEG C, T4135<T < 200 DEG C, T5100<T below 135, T685<T < 100 DEG C.

3)在爆炸性气体区域（0区、1区、2区）不同电气设备使用安全级别的划分。如旋转电机选型分为隔爆型（代号d）、正压型（p）、增安型（e）、无火花型（n）

3) division of the use of safety levels in the use of different electrical devices in the explosive gas area (0, 1, and 2). Such as the type of the rotary motor selection is divided into the explosion-proof type (code D), positive pressure type (P), the increase safety type (E), no spark type (n)

防护等级：

Protection level:

1 防护大于50MM固体的电机能防止大面积的人体偶然意外地触及或接近壳内带电或转动部件。能防止直径大于50MM的固体异物进入壳内

1 the motor that is protected more than 50MM solid can prevent large areas of accidental accidental touching or near the shell or rotating parts.. Can prevent the diameter of solid foreign body into the shell larger than 50MM

2 防护大于12MM固体的电机 能防止直径大于12MM的固体异物进入壳内

2 the motor of the protection greater than 12MM can prevent the solid foreign body diameter greater than 12MM from entering the shell

3 防护大于2.5MM固体的电机 能防止直径大于2.5MM的工具或导线触及或接近壳内带电或转动部件

3 the motor of the protection greater than 2.5MM can prevent the diameter of the tool or wire that is greater than 2.5MM touch or close the shell or the rotating member

4 防护大于1MM固体的电机 能防止直径或厚度大于1MM的导线或片条触及或接近壳内带电或转动部件

4 door more than 1mm solid motor can prevent the diameter or thickness greater than 1mm wire or strip touching or near the inner shell charged or rotating parts

5 防尘电机 承受任何方向的溅水应无有害影响

5 dust motor bear in any direction should be no harmful effects of splash

1 防滴电机 垂直滴水应无有害影响

1 drip machine without vertical drop of water should have no harmful effect

2 15度滴电机 当电机从正常位置向任何方向倾斜至15度以内任一角度时，垂直滴水应无有害影响

215 degree drop motor when the motor from normal position to any direction from the angle of 15 degrees or less, the vertical drop should have no harmful effect

3 防淋水电机 与垂直线成60度角范围内的淋水应无有害影响

3 no harmful effect of water pouring water in the range of 60 degree angle of the water motor and vertical line.

4 防溅水电机 承受任何方向的溅水应无有害影响

4 splash proof motor under any direction splash should be no harmful effects

5 防喷水电机 承受任何方向的喷水应无有害影响

5 no harmful effect of spraying water in any direction of the spray motor

6 防海浪电机 承受猛烈的海浪冲击或强烈喷水时，电机的进水量应不达到有害的程度。

6 anti - wave electric machine to withstand the violent wave of the impact or strong water, the motor intake should not reach the extent of the harmful.

7 防浸水电机 当电机浸入规定压力的水中经规定时间后，电机的进水量应不达到有害的程度

7 when the motor is immersed in the prescribed pressure of the motor in the water immersion motor, the amount of the water intake should not reach the harmful degree

8 潜水电机 电机在制造厂规定的条件下能长期潜水。电机一般为水密型，便对某些类型电机也可允许水进入，但不应达到有害的程度

8 submersible motor motor in the conditions of the factory can be long-term diving. Motor is generally watertight type, and some types of motor can also allow water to enter, but should not reach the extent of harmful

防爆电机就是主要用于煤矿、石油天然气、石油化工和化学工业。此外，在纺织、冶金、城市煤气、交通、粮油加工、造纸、医药等部门也被广泛应用。防爆电机作为主要的动力设备，通常用于驱动泵、风机、压缩机和其他传动机械，为人们创造更安全的生产环境，保障生产和人生安全。

Explosion proof motor is mainly used in coal mine, petroleum gas, petrochemical and chemical industry. In addition, in the textile, metallurgy, urban gas, transportation, oil processing, paper, medicine and other departments are also widely used. As the main power equipment, explosion-proof motor is usually used in driving pumps, fans, compressors and other transmission machinery to create a more secure environment for people to produce and protect the safety of production and life..