Euroclima ZHK, Руководство пользователя

Страница: 131 / 142

Instruction Manual ZHK
130/140 V07-21.0
Temperature classes at gases:
Temperature class
gas
T1 T2 T3 T4 T5 T6
Max.
surface tempera-
ture [°C] gas
450 300 200 135 100 85
Explosion group:
IIA
Acetone
Ammonia
Benzene
Acetic acid
Ethane
Ethyl acetate
Ethyl chloride
Carbon mono-
xide
Methane
Methanol
Methyl chloride
Naphtalin
Phenol
Propane
Toluene Cyclohexa-
none
Acetic acid-an-
hydride
n-Butane
n-butyl alcohol Petrol
Diesel
Fuels
Aviation
fuels
Fuel oils
n-Hexane
Explosion group:
IIB
City gas Ethyl alcohol
Ethylene Hydrogen
sulfide
Ethyl glycol Ethyl Ether
Explosion group:
IIC
Hydrogen Acetylen Carbon
disulfide
Use of AHUs only possible in addition with other measures, e.g. special explosive atmosphere
Use of AHUs in appropriate design possible
Table 23:
Temperature classes and explosion groups for gases
Maximum surface temperature for dust
For combustible dusts, no classification into temperature classes is made. The maximum surface
temperature is given in absolute values in °C, e.g. T 200°C.
Dust Explosion groups
Electrical equipment of group III is further subdivided according to the features of the hazardous
atmosphere for which it is intended, see
Table 24
. The hazard potential of dust rises in connection
with the operation of electrical equipment from IIIA to IIIC. A device with IIIC classification is also
suitable for group IIIA and IIIB.
IIIA
Combustible fibres and lint
e.g.: textiles
IIIB
Non-conductive dusts
e.g.: wood dust, flour dust
IIIC
Conductive dusts
e.g.: metal dust, carbonaceous dust
Table 24:
Explosion groups for dust