Grundfos MGE Series - Cable requirements; Mains supply

English (GB)
9
7.2 Cable requirements
7.2.1 Cable cross-section
Single-phase supply
Three-phase supply
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
7.3.1 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 22.1 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
DANGER
Electric shock
- Death or serious personal injury
- Always comply with local regulations as
to cable cross-sections.
Conductor
type
Conductor
material
Cross section
[mm
2
][AWG]
Solid
Copper
0.5 - 2.5 28-12
Stranded 0.5 - 2.5 30-12
Conductor
type
Conductor
material
Cross section
[mm
2
][AWG]
Solid
Copper
0.5 - 10 18-8
Stranded 0.5 - 10 18-8
DANGER
Electric shock
- Death or serious personal injury
- Use the recommended fuse size. See
section 22.1 Supply voltage.
If you want to supply the motor through an
IT network, make sure that you have a
suitable motor variant. If you are in doubt,
contact Grundfos.
MGE 71, 80, 90
TM05 4034 1912
MGE 71, 80, 90
TM05 3494 1512
RCD,
type B