Installation, Operating and Maintenance Instructions (Translation)
English
.
VEM motors GmbH-2013
19
11. Commissioning
Please follow the Safety Regulations closely. All work is to be carried out only when there is no voltage on the mo-
tor. The installation must be carried out according to the valid regulations by qualified skilled personnel. Initially the
mains conditions (voltage and frequency) must be compared with the data on the rating plate of the motor. The
dimensions of the connecting cables must be adjusted in line with the rated currents of the motor.
The connection points of the motor are marked in accordance with EN 60034-8 (VDE 0530 Part 8). In Section 19 of
these instructions the most common circuit diagrams for three phase motors in basic design are provided, accord-
ing to which the connection will be implemented. For all other versions, the special circuit diagrams are glued to the
inside of the terminal box cover or placed in the terminal box. An additional terminal box can be provided for the
connection of auxiliary and protection devices (e.g. anti-condensation heaters); the same regulations apply as for
the main terminal box.
Always start the motors with an over-current protection device that is set in accordance with the relevant nominal
values of the motor (
1.05 I
nom
). Otherwise warranty claims with respect to damaged windings become void. Before
the motor is connected for the first time it is recommended to check the insulation resistances between winding and
earth and between phases (see Section 9). After prolonged storage it is absolutely essential that the insulation
resistance is measured. Before coupling the motor to the driven machine, check the direction of rotation of the mo-
tor to prevent possible damage being caused to the driven machine. If the power lines are connected with the
phase sequence L1, L2, L3 to U, V, W, the direction of rotation is clockwise (view to shaft end on drive side DS). If
two terminals are changed, the direction of rotation is counter clockwise (i.e. L1, L2, L3 to V, U, W). For machines
with only one direction of rotation the required sense of rotation is marked by an arrow on the machine. For the
permissible tightening torques for the terminal board bolts refer to the table below:
Tightening torques for bolts (terminal box, end shield, bearing cover)
Thread Ø
M8
M10
M12
M16
M20
M24
Attachment eyes
-
-
-
150
250
400
End shield
25
45
75
170
275
-
Bearing cover
15
20
20
-
-
-
Terminal box
7,5
12,5
-
20
-
-
Before closing the terminal box make absolutely sure that:
- the connection has been made in accordance with the wiring diagram
- all terminal box connections are tightened
- all minimum values of air paths are maintained (see ch. 7)
- the interior of the terminal box is clean and free from foreign particles
- unused cable entries are blanked off and the threaded plugs with seals are tightened
- the seal in the terminal box cover is clean and tightly glued and all sealing surfaces
are in the correct state to ensure that the relevant degree of protection is maintained.
Before starting up the motor check that all safety regulations are strictly adhered to, that the machine is correctly
installed and aligned, that all fixing parts and earthing connections are tightened, that the auxiliary and additional
devices are functionally and correctly connected and if a second shaft end is fitted that the key is secured against
being thrown aside.
If possible the motor is to be connected without load. If the motor is running smoothly and without any abnormal
noises, the load of the driven machine is to be applied onto the motor. When the motor is started up it is recom-
mended to monitor the current consumption if the motor is loaded with its driven machine so that any possible over-
loads and asymmetries occurring in the mains can be recognised immediately.
For mountings like encoders, brakes and others please observe the corresponding operating and maintenance
instructions of the manufacturer.
12. Maintenance
You are once again referred to the Safety Regulations, in particular to isolation, to securing against reconnection,
to checking whether all components connected to a voltage source are in dead state. If it is necessary to discon-
nect the motor from the mains for maintenance work particular care must be taken to ensure that any possibly ex-
isting auxiliary circuits (e.g. anti-condensation heaters, forced ventilators, brakes) are also disconnected from the
mains.
If the motor is to be dismantled during maintenance work, the sealing compound on the centring shoulders is to be
removed. When re-assembling the motor these need to be re-sealed using a suitable motor sealing compound.
Existing copper sealing washers must always be refitted.
Careful and regular maintenance, inspections and revisions are necessary to detect and clear faults in time, before
consequential damages will happen. As individual operating conditions cannot be defined for all applications the
