1. 隔爆型電氣設備

 具有(you)能承受(shou)內(nei)部爆(bao)炸性氣體混合物(wu)的爆(bao)炸壓力，并阻(zu)止內(nei)部的爆(bao)炸向外殼周圍爆(bao)炸性混合物(wu)傳(chuan)播的外殼電氣設備，標志為“d"。

2. 增安(an)型電氣(qi)設(she)備

 在(zai)正常運行條件下不會(hui)產生電弧(hu)、火花或可(ke)能點燃爆(bao)炸性混合物(wu)的高溫，結構上采(cai)取措施提(ti)高安全裕(yu)度，以避免在(zai)正常和認可(ke)的過

 載條(tiao)件下出現電(dian)弧、火花或高溫電(dian)氣設備，其標志為“e"。

3. 粉塵防爆電氣設(she)備

 按規(gui)定條(tiao)件設(she)計制造，使其外(wai)殼能阻(zu)可(ke)燃粉塵進(jin)入(ru)或進(jin)入(ru)量不會(hui)防礙設(she)備(bei)安全(quan)運行，內部(bu)堆積的(de)粉塵也不易(yi)的(de)產生點燃，從而保證

 使用時不(bu)會引起周圍爆炸(zha)性混合(he)物的(de)爆炸(zha)的(de)電(dian)氣設備。

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's without electric arc spark and high temperature up to ignite mixturer, it's structure adopts, safety step to avoid

 appearing electric, spark and high temperature, mark "e".

3. Powder&dust electric equipment

 On 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(zhu)：

1. 粉塵防爆電(dian)氣(qi)設備的溫度(du)組(zu)別與氣(qi)體防爆電(dian)氣(qi)設備的組(zu)別劃分(fen)相同(tong)。

2. 粉塵(chen)防爆(bao)電氣設備根據美標和歐標的(de)(de)差異分為(wei)A、B兩種型式。A、B兩種采用(yong)的(de)(de)試驗方法不同，但保護的(de)(de)等級(ji)是等同的(de)(de)。

Note:

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.