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7.2.2 Conductors
Type
Stranded or solid copper conductors.
Temperature rating
Temperature rating for conductor insulation: 60 °C
(140 °F).
Temperature rating for outer cable sheath: 75 °C
(167 °F).
7.3 Mains supply
DANGER
Electric shock
Death or serious personal injury
- Use the recommended fuse size. See
section
22. Technical data, three-phase
motors.
7.3.1 Three-phase supply voltage
Three-phase motors are available for the voltages
below:
•
3 x 380-480 V - 10 %/+ 10 %, 50/60 Hz, PE
Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
The wires in the motor terminal box must be as short
as possible. Excepted from this is the separated
protective-earth conductor which must be so long
that it is the last one to be disconnected in case the
cable is inadvertently pulled out of the cable entry.
In order to avoid loose connections, make sure that
you have pressed home the terminal block for L1, L2
and L3 in its socket when you connect the supply
cable.
For maximum backup fuse, see section
22. Technical data, three-phase
Motors cannot be supplied through an IT
network.
RCD,
type B
L1
L2
L3
PE
Fig. 4
Example of a mains-connected motor
with main switch, backup fuses and
additional protection
8
motors.
L1
L2
L3
Fig. 5
Mains connection, three-phase motors
7.4 Additional protection
DANGER
Electric shock
Death or serious personal injury
- Only use residual-current circuit
breakers (ELCB, GFCI, RCD) of type B.
The residual-current circuit breaker must be marked
with the following symbol:
The total leakage current of all the electrical
equipment in the installation must be taken into
account. You find the leakage current of the motor in
sections
22.1 Supply voltage
current
(AC).
This product can cause a direct current in the
protective-earth conductor.
Overvoltage and undervoltage protection
Overvoltage and undervoltage may occur in case of
unstable power supply or a faulty installation. The
motor is stopped if the voltage falls outside the
permissible voltage range. The motor restarts
automatically when the voltage is again within the
permissible voltage range. Therefore, no additional
protection relay is required.
The motor is protected against transients
from the power supply according to EN
61800-3. In areas with high lightning
intensity, we recommend external lightning
protection.
and
22.2 Leakage
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