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Manual BVS 19 ATEX E 080 X
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Cable glands must have a protection class
greater than IP54.
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If the Ex pzc-housing has surface made of
synthetics (e.g. windows) with an area
greater than 100 cm², than a warning sign
against electro static discharge is neces-
sary.
Caution ! Danger of static discharge. Clean
only with humid cloth!
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There is no danger of static discharge, if the
synthetic surface has a thickness of ≤ 0,2
mm (Group IIC) respectively 2 mm (Group
IIB) or less and it is mounted on a metallic
ground.
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If the Ex pzc-housing posses internal com-
partments the installer has to obey the fol-
lowing rules:
a) Components with a free internal volume
less than 20 cm³ are not considered to
be internal compartments requiring
purging as long as the total volume of all
such components is not more than 1%
of the free internal volume of the pres-
surized apparatus. (IEC 60079-2; Abs.
5.5.4)
b) Provide not less than 1 cm² of vent area
for each 1000 cm³, with a minimum vent
size of 6,3 mm diameter should be allow
for adequate purging. (IEC 60079-2;
Abs. 5.5.2)
c) Place the vents in a diagonal order, as
shown on the picture below, with a min-
imum vent size of 6,3 mm diameter
drillings
Edition July 2020
Copyright
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小心！ 静电危险。 只用湿布清洁！
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电缆格兰必须具有大于IP54的保护级。
如果防爆正压腔体表面由合成材料制成(
例如窗玻璃)面积大于100cm²，防止静电
放电的警告标志是必要的。
如果合成表面的厚度分别为小于0.2毫米(II
C组)，2毫米（II B组）或更小，并且安装
有金属接地，则不存在静电的危险。
如果防爆正压腔体拥有内部隔间，安装程
序必须遵守以下规则
a) 自由内部体积小于20cm³的部件不被
认为是需要吹扫的内部隔间，只要所有
这些部件的总体积不超过正压装置自由
内部体积的1%。 (IEC 60079-2,
Abs. 5.5.4)
b) 为每1000cm³提供不少于1cm²的通风
口面积，最小通风口直径为6.3毫米，
应允许适当的吹扫。 (IEC 60079-2,
abs. 5.5.2)
c) 将通风口按对角线顺序放置，如下图所
示，最小通风口直径为6.3毫米
thuba Ltd., CH-4002 Basel
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drillings
Switzerland
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