:
( ) . .

.
.
.
. ( ) ( ) .
(Intrinsically safe) .
(enclosures) .
.
(auto ignition) .
.
Classification of Hazardous Areas :
. . .
.
. . .
. (Divisions) (Zones) .
(Class) (Group) . . .
1- (Divisions and Zones)
.
(Zone 0, Zone 1 & Zone 2) (Division 1 & Division 2) .
() (Zone 0) : .( 1000 /) .
(1) (Zone 1) : ( 10-1000 /) .
(2) (Zone 2) : ɡ .(10 /).
2- (Class) :
- Class I
- Class II
- Class III
(Class I) . Dusts Fibers & Flyings Class II & Class III NECɡ Class I .
(1) (Division 1) () (1) (Zone 0 & Zone 1) .
3- (Group) :
: Group A
: Group B
: Group C
: Group D
: Group E
: Group F
: Group G
(Flame Paths) (Gaps) ɡ .
4- (Temperature Classifications)
.
T1 T6 450 85 IEC T2 A B C D T3 A B C T4 A . . 80% .
Ambient Temperature 40 40 .
VDE (G1 to G5) (T1 T5) .
(T1 T6) :
Maximum Surface Temperature in C
Temperature Class
450 T1
300 T1
200 T3
135 T4
100 T5
85 T6
5- (Ingress Protection Codes) :
(IP)







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