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of the sensor circuit must never exceed 810 Ohms; a measurement of the hot resistance is not
necessary.
With motors that are fitted with thermal winding protection, care must be taken that
when the thermal winding protection responds and after the cooling down of the motor,
no hazards can occur due to spurious automatic reconnection.
Anti-condensation heating
The input supply voltage is indicated on the name plate of the motor. For their connection either in the
main terminal box or in the auxiliary terminal boxes suitable clamps for auxiliary circuits are provided.
The connection is done according to the attached connection diagram. The anti-condensation heating
has to be switched on only after disconnection of the motor. It shall not be switched on while the
motor is in operation.
Forced ventilation unit
The forced ventilation unit is dissipating the lost heat at operation of the main motor. During operation
of the main motor the motor of the forced ventilation unit has to be switched on. After disconnection of
the main motor the forced ventilation has to continue depending on the temperature. For motors with
forced ventilation units that are dependent of the sense of rotation, the sense of rotation has to be
observed unconditionally (see rotation mark). Only manufacturer approved forced ventilation units
shall be used. The forced ventilation unit has to be connected according to the connection diagram
that is supplied inside of the terminal box.
7. Commissioning
Start with putting into operation and
use only after placing the engine in
accordance with the regulations!
Please follow the Safety Regulations closely. All work is to be carried out only when there is no
voltage on the motor. 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. Circuit diagrams are
glued to the inside of the terminal box cover or placed in the 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 Inom). 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. 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 motor 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 counterclockwise (i.e. L1, L2, L3 to V, U, W).
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
- 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.
