Installation and electrical connection
en
Installation and operating instructions Wilo-Rexa CUT GE
21
6.5.2.3
Testing the resistor of the ex-
ternal electrode for sealing cham-
ber control
Measure the resistor of the electrode with an ohmmeter. The measured value must ap-
proach “infinity”. For values ≤ 30 kOhm, if there is water in the oil – change the oil!
6.5.3
Connection of the single-phase
motor
The single-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
connection must always be carried out by a qualified electrician!
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.
U1/Z1
3
U2
4
C
r
Z2
5
C
S
M 1~
gn-y
e
L
N
PE
1
2
6
3
4
gn-y
e
1
2
6
21
20
DK
Fig. 7: Connection diagram single-phase motor
Wire
Designa-
tion
Terminal
1, 2
20, 21
Monitoring of motor winding
3
U1/Z1
L
4
U2
N
5
Z2
Connection for start and operating capacitor
6
DK
Monitoring of motor compartment
Green/yellow (gn-
ye)
PE
Earth
6.5.4
Three-phase motor connection
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
connection must always be carried out by a qualified electrician!
For the correct direction of rotation, a clockwise rotating field must be available.
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.
5
1
2
4
3
M 3~
gn-y
e
W
V
21
20
U
PE
6
DK
Fig. 8: Connection diagram: Bimetallic strip,
direct starting
Wire
Designa-
tion
Terminal
1, 2
20, 21
Monitoring of motor winding
3
U
L1
4
V
L2
5
W
L3
6
DK
Monitoring of motor compartment
Green/yellow (gn-
ye)
PE
Earth
