9
6.2.2 Wiring diagram
The wires in the terminal box must be as short as possible.
Excepted from this is the protective 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.
Fig. 6 Wiring diagram, three-phase mains connection
6.2.3 Mains connection, enclosures A2 and A3
For information about enclosure, see table in section 16.1.
1. Fit the mounting plate with two screws.
Fig. 7 Fitting the mounting plate
2. Connect the ground conductor to terminal 95 (PE) and the
mains conductors to the terminals 91 (L1), 92 (L2), 93 (L3) of
the mains plug. Put the mains plug into the socket marked
MAINS.
Fig. 8 Connecting the ground conductor and mains
conductors
3. Fix the mains cable to the mounting plate.
Fig. 9 Fixing the mains cable
TM03 8799 2507
Terminal Function
91 (L1)
Three-phase supply92 (L2)
93 (L3)
95/99 (PE) Ground connection
96 (U)
Three-phase motor connection, 0-100 % of
supply voltage
97 (V)
98 (W)
For single-phase connection, use L1 and L2.
Cable sizing:
To determine the conductor gauge size for
single-phase mains input cable, multiply the
CUE's max. current output by 2, and choose the
gauge size based on that amperage.
For three-phase input, use the same conductor
gauge size as selected for the motor.
For CUE to motor, use standard published three-
phase wiring charts based on motor size.
Check that mains voltage and frequency
correspond to the values on the nameplate of the
CUE and the motor.
TM03 9010 2807
TM03 9011 2807
For single-phase connection, use L1 and L2.
TM03 9014 2807
Grundfos.bk Page 9 Friday, July 30, 2010 10:10 PM
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