Wilo Rexa CUT GI Instrucciones De Instalación Y Funcionamiento página 23

6.5.4 Connection of the three-phase
current motor
PE L1 L2 L3
M 3~
Fig. 8: Connection diagram of the three-phase
current motor
6.5.5 Connection of the monitoring de-
vices
6.5.5.1 Monitoring the motor winding
6.5.5.2 Sealing chamber monitoring (ex-
ternal electrode)
Installation and operating instructions Wilo-Rexa CUT GI
Installation and electrical connection
Technical data for the starting capacitor and operating capacitor
Capacitors must be provided on-site.
▪ For motor power: 1.5 hp und 2 hp
– Starting capacitor (C
– Operating capacitor (C
▪ For motor power: 3 hp
– Starting capacitor (C
– Operating capacitor (C
▪ Operating time of starting capacitor: max. 1 s
The three-phase current version is equipped with bare cable ends. Connection to the mains
is established by connecting the power supply cable in the switchgear. Electrical connec-
tion must always be carried out by a qualified electrician!
For the correct direction of rotation, a clockwise phase sequence must be present.
NOTICE! The individual wires are designated according to the connection diagram. Do
not cut the wires! There is no additional assignment between the wiring diagram and
connection diagram.
Wire color
20 21
Orange (og)
Blue (bu)
Black (bk)
White (wh)
Red (rd)
Green (gn)
All monitoring devices must be connected!
Single phase AC motor
For AC motors the thermal motor monitoring is auto-switching. The monitoring function is
always active and does not need to be connected separately.
Three-phase current motor with bimetallic strip
Bimetallic strips are directly connected to the switchgear or via an evaluation relay.
Connection values: max. 250 V (AC), 2.5 A, cos φ = 1
When the threshold is reached, deactivation must take place.
In the version with an attached plug, the thermal motor monitoring is pre-wired and set to
the correct value in the plug.
Connect the external electrode via an evaluation relay. Relay "NIV 101/A" is recommended
for this. The threshold is 30 kOhm.
Once the threshold is reached, a warning must be output or the unit must be switched
off.
): 70 µF, 440 V, 60 Hz
S
): 35 µF, 440 V, 60 Hz
R
): 120 µF, 440 V, 60 Hz
S
): 60 µF, 440 V, 60 Hz
R
Designation
20
21
U
V
W
Ground
en-US
Terminal
WSK
WSK
L1
L2
L3
PE
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