Electrical Connections And Preliminary Tests - Bernard Controls SQ Serie Anleitung Für Die Inbetriebnahme, Lagerung Und Wartung

SQ25/SQ60/SQ80 models:
Some of these actuators are equipped with declutchable intermediate
gears. By moving the clutch lever, the motor is physically disengaged from
the gears. Once the manual handwheel operation has been completed,
do not forget to clutch the motor back. Otherwise, once started-up,
it would run and heat up until the motor thermal protection switch closes.
If repeated, these conditions can generate a motor breakdown .

4 ELECTRICAL CONNECTIONS AND PRELIMINARY TESTS

If the actuator is equipped with INTELLI+®, INTEGRAL+, POSIGAM, MINIGRAL
or MINIGAM commands, please report to the specific documentation for wi-
ring details.
Otherwise, all components of the actuator are wired to a common
terminal strip. Remove the cover and pass the cables through the cable
glands (M20). Refer to the wiring diagram for details on the terminals
numbering system.
Both torque and travel limit switches must be integrated into your
control system (see wiring examples) in order to prevent potential
damage to the actuator or valve.
The following points must be checked:
a) Make sure that power supply voltage is in accordance with the data
engraved on the actuator nameplate,
b) Check that all cable glands are correctly tightened,
c) Move the valve manually to an half-open position,
O
d) perate an electrical opening and check that the motor rotates
in the right direction. Press manually on the «OPEN» travel limit
switch ; the motor should stop.
In the same way, check that the closing electrical command as well as
the «CLOSED» travel limit switch are working correctly,
e) All models except SQ4 to SQ15: operate an electrical opening. Press
manually on the «OPEN» torque limit switch ; the motor should
stop.
In the same way, operate an electrical closing check that
the «CLOSED» torque limit switch is working correctly,
If any misfunction was detected at this stage, please check the overall
wiring.
For safer working conditions, we recommend that the power supply now
be switched off especially if the actuator output max. torque exceeds
300 N.m.
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