Grundfos CRE User Manual

Conductors
Type
Stranded or solid copper conductors.
Temperature rating
Temperature rating for conductor insulation: 140 °F (60 °C).
Temperature rating for outer cable sheath: 167 °F (75 °C).
6.3 Power supply
DANGER
Electric shock
‐ Death or serious personal injury
‐ Use the recommended fuse size. See the section on
supply voltage.
Single-phase supply voltage
• 1 × 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 the section on supply voltage.
L(L1)
N(L2)
PE
L1
L2
TM083397
Example of a power supply-connected motor with power supply
switch and backup fuse
N
L
PE
TM053494
Power supply connection, single-phase motors
Terminal L of the motor is the input for L1. Terminal N of the motor
is the input of L2.
Three-phase supply voltage
• 3 × 440-480 V -10 % / +10 %, 50/60 Hz, PE
• 3 × 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 the section on 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.
Corner grounding is not allowed for supply voltages above
3 × 480 V, 50/60 Hz.
L1
L2
L3
PE
L1
L2
L3
TM083398
Example of a power supply-connected motor with power supply
switch and backup fuses
PE
L2
L1
L3
TM053495
Power supply connection, three-phase motors
Related information
11.3.1 Supply voltage
11.4.1 Supply voltage
14
English (US)

Grundfos CRE Specifications

General

Protection Class	IP55
Material	Stainless Steel
Applications	Water supply, pressure boosting, irrigation
Impeller Material	Stainless Steel
Pump Housing Material	Stainless Steel
Connection Size	DN32 to DN200 (depending on model)
Power Supply	3-phase
Control	Integrated frequency converter