English (GB)
8
6.3 Mains supply
6.3.1 Single-phase supply voltage
Single-phase motors are available for the voltages below:
• 1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz, PE
• 1 x 90-240 V - 10 %/+ 10 %, 50/60 Hz, PE or 30-300 VDC
(power supply from a renewable-energy source).
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 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.
For maximum backup fuse, see section 15.1 Supply voltage.
Fig. 6 Example of a mains-connected motor with mains
switch, backup fuse and additional protection
Fig. 7 Mains connection, single-phase motors
6.3.2 Three-phase supply voltage
• 3 x 380-500 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 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.
For maximum backup fuse, see section 16.1 Supply voltage.
Fig. 8 Example of a mains-connected motor with mains
switch, backup fuses and additional protection
Fig. 9 Mains connection, three-phase motors
If the motor is supplied through an IT network, a
dedicated IT network motor should be used.
Contact Grundfos.
MGE 71 and MGE 80
TM05 4034 1912
MGE 71 and MGE 80
TM05 3494 1512
In order to avoid loose connections, ensure that
the terminal block for L1, L2 and L3 is pressed
home in its socket when the supply cable has
been connected.
Corner grounding is not allowed for supply
voltages above 3 x 480 V, 50/60 Hz.
If the motor is supplied through an IT network, a
dedicated IT network motor should be used.
Contact Grundfos.
MGE 90
TM05 3942 1812
MGE 90
TM05 3495 1512
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