1、Isolation explosive electric equipment
Withstanding for explosion pressure from interior mixed air also avoiding it spread out to exterior mixed air, mark“d”.
2、Increasing safety electric equipment
In normal condition, it withoutelectric arc spark and high temperature up to ignite mixturer, it structure adopts, safety step to avoid appearing electric, spark and high temperature, mark“e”
3、Powder&dust electric equipmentOn stated condition the enclosure can prevent dust entering or the interior dust will not ignite mixed air, so that ensure the surrounded explosive mixed air will not be ignited.
注: Note:
1、粉塵防爆電氣設(shè)備的溫度組別與氣體防爆電氣設(shè)備的組別劃分相同。
2、粉塵防爆電氣設(shè)備根據(jù)美標(biāo)和歐標(biāo)的差異，為分A、B兩種型式。A、B兩種采用的試驗方法不同，但保護的等級是等同的。
1、Dust explosive electric equipment and air explosive electric equipment temperature classes is the same.
2、According to America and europe standard difference. There are two kinds, the test ways of A and B is different, but protective class is the same.
溫度組別 Temperature class
溫度組別
氣體引燃溫度
設(shè)備允許最高表面溫度
T6
85＜T≤100
85
T5
100＜T≤135
100
T4
135＜T≤200
135
T3
200＜T≤300
200
T2
300＜T≤450
300
T1
450＜T
450
防爆標(biāo)志舉例 Explosive mark exemplify
1、如電氣設(shè)備為ⅡB類隔爆型T3組，標(biāo)志為Exd Ⅱ BT3。
2、如電氣設(shè)備為Ⅱ類增安型，溫度組別為T2組，標(biāo)志為ExeⅡT2。
3、如電氣設(shè)備采用一種以上的復(fù)合型式，則先標(biāo)出主體防爆型式，后標(biāo)出其它防爆型式，如主體采用增安型內(nèi)裝ⅡC類隔
爆部件，溫度組別為T4，標(biāo)志為ExedⅡCT4。如果主要部件采用隔爆型ⅡB類，T4組，其余部件為增安型，則防爆標(biāo)
志為ExedⅡCT4。
4、DIPA20 TA T4，DIP表示粉塵防爆，A20表示可使用于20區(qū)的A型設(shè)備，TAT4表示設(shè)備的溫度組別為T4(135℃)。
1、Class ⅡB, group T3 isolation explosive electric equipment, mark“ExdⅡBT3”.
2、Class Ⅱ, group T2 increasing safety explosive electric equipment, mark“ExeⅡT2”.
3、It adopts multiple type, First mark main explosive proof type. Then mark other explosive-proof type. The main body adopt increasing
safety and built-in classⅡC isolative explosion parts, temperature T4, mark“EexdⅡCT4”,if main part adopts isolative explosive
ⅡB T4, other adopt increasing safety, then it marks“ExdeⅡBT4”.
4、DIPA20TA, T4, DIP means dustignition explosion-proof A20
means type A explosive-proof equipment and used for Zone 20, TA T4 means temperature T4 (135℃).
