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Les langues disponibles
Water-proofness
Because the NPT cable gland thread is not IP68, it's necessary to mount it with a thread sealant for ex: Loctite
577 (Henkel). In case of ISO thread, sealing is assured by an O ring or by a thread sealant as noticed above.
Please note : For Exd enclosure, thread type (NPT or ISO) is indicated in the connection box to avoid any mistake.
1.4 OPERATION
Do not open the cover when an explosive atmosphere may be present.Never leave the cover open,
in order to avoid any risk of water inlet.
Respect the actuator duty cycle indicated on the identification plate. For example, for a 30%
duty and a 40s operating time, the minimum time
between two operations is 93 s. In case of over-
heating, the thermal protection will disrupt the mo-
tor power supply in order to limit the actuator body
temperature elevation.
1.5 MAINTENANCE
Regularly check that the actuator explosion-proof body has not been degraded by a mechanical
shock or any other type of agression. The cable glands are explosion-proof components and, as
such, must be kept intact.
Check that the glands and the cables aspect is normal and also that there is no risk of water
entering into the actuator (avoid placing the cable glands upwards i.e).
The actuator mechanical parts are lubricated and do not necessitate any specific maintenance.
In the event of a dismounting/remounting operation, make sure that all moving parts are correctly
lubricated in order to prevent any electric spark. The oil for lubrification must have an auto-ignition
temperature ≥200°C. Please consult Bernard Controls.
Although a thermal protection is built in the motor,
it is important to check that there is no risk of bea-
rings jamming.
Bearings change frequency: 10000h of operation.
1.6 REPAIRS AND MODIFICATIONS
Do not bring any modification of any kind to the actuator.
Any repair on the explosion proof or the increased safety device requires a prior manufacturer
agreement and generally necessitates to return it to the manufacturer workshop in order to secure
the explosion proof and increased safety protection integrity. The dimensions of flameproof joints
are different from the values specified in the tables of the the EN/IEC 60079-1 standard ; the fla-
meproof joints are not intended to be repaired
Consult BERNARD CONTROLS for information.
Paint coating repair
In case actuator operates in group IIC and painting must to be repaired, make sure that
max. thickness of paint coating is 0,2 mm.
This limitation does not apply in case paint coating has a surface resistance inferior to
9
10
ohms for a relative humidity of 50±5 % or 10
Centerings and flanged faces of housing parts must not be painted.
1.7 ELECTRICAL AND TEMPERATURE PARAMETERS
The power supply voltage and frequency are indicated on the identification tag and (or) on the electric
6
« WARNING– DO NOT OPEN WHEN
AN EXPLOSIVE ATMOSPHERE
« Risk of electrostatic discharges in Dust
atmospheres - Please regularly remove
dust deposits from the surface of the
actuator using a damp fabric »
WARNING
11
ohms for a relative humidity of 30±5%.
CAUTION:
MAY BE PRESENT »
CAUTION:
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