ABB VM1 Installation And Service Instructions Manual page 41

M E D I U M V O LTA G E P R O D U C T S
Fig. 13a
Note
By means of the transmission chain, truck handling carried out using the
manual lever makes the truck motor armature rotate which, behaving
like a generator, can cause inverse voltage at the connection terminals.
Max. 25 Nm
Fig. 13b
This may damage the permanent magnet of the motor, therefore all
the truck racking-in and racking-out operations carried out using the
manual lever must be done without power supply in the motor circuit.
Racking-in
Racking-out
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