Installation Area; Cautions For Electrical Connection - Bernard Controls SQX TOTAL N31272 Manuel De Mise En Service

1.2 INSTALLATION AREA

This actuator is a category 2 explosion-proof equipment and can be used in the following areas
depending on the marking :
Actuator type
Protection
Category
Areas
Atmosphere
EPL = Equipment's Protection Level. b= high level Gas (G) and Dust (D).
Zone 1 (gas) & 21 (dust): the explosive atmosphere is likely to occur occasionally in normal operation.
Zone 2 (gas) & 22 (dust): the explosive atmosphere is not likely to occur in normal operation but
if it does occur, it will persist for a short period of time only.
This device has not been designed to be operated in areas where the risk
of getting explosive atmosphere, frequently or during long periods, is high (Zone 0).
(*) Other gas, please consult a notified body (INERIS or LCIE i.e)
The temperature class corresponds to the actuator maximum surface temperature.

1.3 CAUTIONS FOR ELECTRICAL CONNECTION

Opening the covers
To avoid any risk of explosion, do not open when explosive atmosphere may be present. It is prefe-
rable that the actuator electric control and power supply are switched off before opening the cover.
Be careful not to damage the joint surfaces of the cover.
The explosion proof joint may be lubricated with a grease that does not become hard and is anticorrosion.
Be careful not to damage the gaskets when repositioning the cover onto the actuator body. Tighten
each cover screw.
Screws of explosion-proof actuator body must be of a minimum 8.8 quality grade or made of
stainless steel Class A2 or A4 with a minimum 80 daN/mm2 tensile strength.
In case of use in explosive dust atmosphere, check that cover tightness gaskets are intact and make
4
STX..,
Ex db h, Ex db eb h, Ex tb
2 (EPL Gb, Db)
1 or 2 21 or 22
G Gas D Dust
WARNING
Group Typical gas (*)
IIB
IIB + H2
IIC Hydrogen, Acetylene
Class Max surface temperature
T4
T5
T6
SQX
Ex db h, Ex db eb h, Ex tb
2 (EPL Gb, Db)
1 or 2 21 or 22
G Gas D Dust
This product is desig-
Ethylene ned for a use in surface
industries
Hydrogen
IIB+H2 or IIC.
135°C
100°C
85°C
group IIB,