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7 Start-up
When commissioning the vibrators, the rules and regulations of the local asso-
ciations for electrical engineering (e.g. VDE) and the valid accident prevention
regulations must be observed.
The vibrators must always be switched on and off at the main switch.
When operating the external electric vibrators with a frequency converter, com-
IMPORTANT
pliance with the EMC directive must be ensured.
If the speed is controlled with a frequency converter, the maximum centrifugal
force must not be exceeded. The unbalances must be reduced if necessary.
The vibrators must not be oper-
ated without the covers for the
unbalances! The rotating un-
balances cause a risk of injury!
WARNING
In zone 22, the frequency converter may control the frequency between 20 Hz
and 50 Hz or 20 Hz and 60 Hz at constant torque (linear Volt-Hertz curve). Ob-
serve maximum frequency on the type plate.
Explosion-protected vibrators may only be operated in atmospheres that do not
damage the material of the equipment.
The terminal box cover must never be opened in a potentially explosive atmos-
DANGER
phere or in the presence of voltage.
The supplementary regulations and instructions applicable in Ex-areas must be
observed.
On initial start-up, the current consumption must be measured individually in all
three phases and must correspond to the specifications on the type plate.
DANGER
The vibrators must be adapted to your application by adjusting the unbalances.
You can directly influence the oscillation bandwidth, centrifugal force and current
consumption, see chap. 8 "Adjustment of unbalances".
Retightening:
Screw connections must be checked and, if necessary, retightened after 1 h
WARNING
operating time (after initial commissioning) and thereafter regularly (generally
monthly).
15
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