Operating manual 17.410+411
Pos.: 20
Dateiname
Firma
Datum
Rev
BK-DH 700 x 1000 eng.doc
BRUKS-KLÖCKNER
27.02.09
00
Seite 14 von
61
3.1.14 Run-up device (if requested)
The run-up device is a hydraulic donkey drive that with reduced electrical power in
combination with hydraulic power transmission shall overcome the existing inertia of
masses of the system of chipping rotor ? pulley ? electric driving motor.
The reason is to reduce or prevent the starting currents that would generate with di-
rect start by the main motors.
For this purpose, the system chipping rotor ? pulley ? electric driving motor is
dragged up to the rated speed of the main motors by an installed hydraulic motor.
When reaching the rated speed the main motors are hooked up into the electric net-
work with the result that high power withdrawal of the electric network is prevented.
Subsequent to reaching the rated speed and join-up of the main motors into the elec-
tric network, the hydraulic motor respectively the hydraulic power transmission is un-
coupled via a specifically previewed coupling.
3.1.15 Rotor hood locking device (if requested)
The hood locking is a hydraulically operated safety device ensuring the automated
operation of the drum chipper. The hood can only be opened e.g. for replacing the
blades at the chipping rotor, with the chipping unit stopped or out of operation. For
this there is an electric link to the hood locking allowing opening of the hood only if
the a.m. conditions are met.
