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The Common Sense of Explosion |
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| 一、Choice for explosion protection electrical apparatus |
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| 1、According the area to choose explosion protection electrical apparatus |
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ICC60079-15 |
American electrical law NEC500 |
GB50058-92 |
GB3836.15-2000 |
0 District |
ia Essence safety electrical apparatus and circuit |
1 District |
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Separated xplosion，
Essence quiet can bear
two broken-down,airiness. |
d,p,e,(Carefuluse)
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d,p,e（Only imited for
junction box, case and
single insert fluorescence
light. etc.） |
| d，p，e，i，q，o，m |
i，q，o，m |
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| 2 District |
(1)1 area using apparatus1
(2)Type“n”
(3)Under the normal workingcondition doesn't produce sparkle apparatus |
(1)1 area using apparatus
(2)Type"n"
(3)Under the normal working
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(1)1 area using apparatus |
(1)1 area using apparatus |
| (2)Type“n” |
(2)Type“n” |
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Record1：As for the special equipment that marked " S", people use it should according to the
related area type, and notice the special terms for fixing and using.Record 2：According to our country condition, allowing type"e"using at section 1 only as
following:
a）Under the normal working condition cannot produce sparkle, electrical arc, or the
junction box or connect case under the dangerous temperature, including electrical products
that bodies are type "d"or"m", and connection is type "e".
b）Type "e" low press asynchronism electromotor with the protect-setting (GB3836.4 appendix D) ,expect frequently startup and bad environment.
c）Single insert type "e" fluorescence light.
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| 0 District:The occasions for the explosive gas atmosphere continue appear or long time exist |
| 1 District:Under the normal working, the occasions maybe appear explosive gas atmosphere. |
| 2 District:Under the normal working, the occasions impossible appear explosive gas if it |
| appears once in a while does short time exist. |
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| 2、 |
Choose the electrical explosion protection apparatus according to the ignition temperature
of the gas or steam. |
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The choice for explosion protection apparatus should be according to the max surface
temperature less than ignition temperature of any gas or steam. |
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Explosion protection electrical apparatus and environment temperature -20℃~+40℃（If the
electrical apparatus marked temperature scope, only the equipment used at this range. ） |
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| The relationship among the temperature group, surface temperature, and ignite temperature |
| Temperature group |
Max surface temp. |
Ignite temp.for gas or steam |
| T1 |
450℃ |
＞450℃ |
| T2 |
300℃ |
＞300℃ |
| T3 |
200℃ |
＞200℃ |
| T4 |
135℃ |
＞135℃ |
| T5 |
100℃ |
＞100℃ |
| T6 |
85℃ |
＞85℃ |
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Max surface temperature for electric equipment is the
mean that max surface temperature for explosion
protection electric equipment under the environment
of blast gas,and the temperature should lower than
ignite temperature for the gas and steam of this dangerous area. |
The ignite temperature is the mean
that the gas or steam burning
temperature under the environment of
blast gas, that is the self
character for the gas and steam. |
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| 3、Gas among the occasion /Steam classifying /Classification and Sorts of using equipment/Relationship |
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| Gas among the occasion /Steam classifying |
Sorts of using
equipment/Relationship |
| ⅡA（For example:Propane, Pentane, Benzene, petrol, Ethanol,
Aldehyde, Acet. Amine） |
ⅡA、ⅡB、ⅡC |
| ⅡB（For example:Ethene, Biaether, burnt stove gas, etc.） |
ⅡA、ⅡB |
| ⅡC（For example:Hydrogen, Acetylene, and carbon bisulfide |
ⅡC |
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| Using criterion： |
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| GB3836.1-2000（Means IEC60079-0:1998）:《Electrical apparatus for explosive gas atmospheres-Part 1:
General requirements》
GB3836.2-2000（Means IEC60079-1:1990）:《Electrical apparatus for explosive gas atmospheres-Part 1：
Separated explosion“d”》
GB3836.3-2000（Means IEC60079-7:1990）:《Electrical apparatus for explosive gas atmospheres-Part
3:Increased safety“e”》
GB3836.4-2000（Means IEC60079-11:1990）:《Electrical apparatus for explosive gas atmospheres-Part4:
Essence safety“i”》
GB3836.13-2000（Means IEC60079-13:1990）:《Electrical apparatus for explosive gas atmospheres-Part13：
Repairing the electric equipment of explosive gas atmosphere》
GB3836.14-2000（Means IEC60079-10:1990）:《Electrical apparatus for explosive gas atmospheres-Part14：
Dangerous area classify 》
GB3836.15-2000（Means IEC60079-14:1990）:《Electrical apparatus for explosive gas atmospheres-Part15：
Fixing electric at the dangerous area （Except coal mine）》 |
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