WEG W22Xdb C 315 - Page 54

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II 2 GD
Ex db IIB T4 (or T3) Gb or Ex db eb IIB T4 (or T3) Gb or Ex db ia (or ib) IIB T4
(or T3) Gb or Ex db eb ia (or ib) IIB T4 (or T3) Gb or
Ex db IIC T4 (or T3) Gb or Ex db eb IIC T4 (or T3) Gb or Ex db ia (or ib) IIC
T4 (or T3) Gb or Ex db eb ia (or ib) IIC T4 (or T3) Gb and/or
Ex tb IIIC T125ºC (or T135ºC ) Db IP 65 (or IP 66) or
Ex ia (or ib) tb IIIC T125ºC (or T135ºC) Db IP 65 (or IP 66)
European symbol for “Ex” products
II
Group of material designed for places with potentially
explosive atmospheres, other than mines susceptible to
firedamp
2
Area where an explosive atmosphere, is likely to occur in
case of abnormal working conditions of the installation
GD
Explosive atmospheres with gas and/or dust
Ex
Symbol which indicates that the material complies with one
or several of the protection modes in accordance with
European Standards
db
Enclosure with flameproof protection
eb
Component with increased safety protection
ia
Intrinsic safety protection level ia
ib
Intrinsic safety protection level ib
B
Subdivision of group II
C
Subdivision of group II
T3/T4
Temperature class
Gb
Equipment protection level
tb
Protection by enclosure for zone 21