Electrical And Temperature Parameters; Special Operation Conditions Including Uncorrect Practices - Bernard Controls ST Seie Instructions

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).
This actuator has been designed for surface industries group IIB, IIB+H2 or IIC
The temperature class corresponds to the actuator maximum surface temperature.
Check group and temperature class on the actuator tag.

6 ELECTRICAL AND TEMPERATURE PARAMETERS

The power supply voltage and frequency are indicated on the identification tag and (or) on the electric
wiring diagram. The minimum ambiant temperature is -20°C and the maximum +40°C unless an
other information is mentioned on the identification tag.

7 SPECIAL OPERATION CONDITIONS INCLUDING UNCORRECT PRACTICES

Duty cycle: the motors are designed for an intermittent operation ; it means that they should
be stopped for a sufficient period of time after each operation in order to enable it to cool down
(see §3 operation).
If the operating time is too high, the motor temperature will raise and will eventually activate
the thermal protection. This event must remain exceptional and everything must be carried out to avoid
switching the thermal protection during normal operation phases.
Covers opening: removing the covers only if there is no explosive atmosphere. It is important
not to degrade the explosion-proof protections (surfaces, cable glands, joints, ...). Use the notches
or bossages in order to preserve the joints integrity.
10
WARNING
Group Typical gas (*)
IIB
IIB + H2
IIC Hydrogen, Acetylene
Class Max surface temperature
T4
T5
T6
Ethylene
(*) Other gas, please
Hydrogen
consult a notified body
(INERIS or LCIE i.e)
135°C
100°C
85°C