Power Supply - Grundfos CRE Instrucciones De Instalación Y Operación

4.2.3 Power supply

DANGER
Electric shock
- Death or serious personal injury
- Use the recommended fuse size. See section
10.3.1 Supply voltage.
Single-phase supply voltage
• 1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz, PE.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
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.
The wires in the motor terminal box must be as short as possible.
Excepted from this is the separated ground 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
RCD, type B
Fig. 4 Example of a power supply-connected motor with
power supply switch, backup fuse and additional
protection
Fig. 5 Power supply connection, single-phase motors
10.3.1 Supply voltage.
Three-phase supply voltage
• 3 x 440-480 V - 10 %/+ 10 %, 50/60 Hz, PE
• 3 x 200-240 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 ground 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
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.
Corner grounding is not allowed for supply voltages
above 3 x 480 V, 50/60 Hz.
RCD, type B
L1
L2
L3
PE
Fig. 6 Example of a power supply-connected motor with
power supply switch, backup fuses and additional
protection
Fig. 7 Power supply connection, three-phase motors
10.4.1 Supply voltage.
L1
L2
L3
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