22
WILO SE 2015-07 V05 Letter
US English INSTALLATION
•
For further measurements: value must be larger
than 2 MΩ.
For motors with an integrated capacitor, the
windings must be short circuited before checking.
Temperature sensor and pencil electrode (avail
-
able as an option) for sealing chamber control
Before connecting the monitoring devices, these
must be checked with an ohmmeter. The following
values must be complied with:
•
Bimetallic strip: Value = “0” passage
•
PTC thermistor sensor: A PTC thermistor sensor
has a cold resistance of between 20 and 100 Ω.
If there are 3 sensors in series, this results in a
value of 60 to 300 Ω.
If there are 4 sensors in series, this results in a
value of 80 to 400 Ω.
•
Pencil electrode: This value must approach infin
-
ity. If the value is low, there is water in the oil. Also
observe the instructions of the optional evalua-
tion relay.
5.5.3. Single phase AC motor
The single-phase version has a capacitor switchgear
(start and operating capacitor) and free cable ends.
The connection to line power is made in the switch-
gear.
Electrical connections may only be made by a
qualified electrician!
If the pump is fitted with a plug, it is connected
to the power supply by inserting the plug into a
socket.
Fig. 5.: Connection diagram
7-wire connection cable
Wire number Terminal Designation
1
20/21
Temperature monitor for winding
2
3
L
U1/Z1
4
N
U2
5
Z2
Connection for start and operating
capacitor
6
DK
Leakage detection for motor com-
partment
green/yellow
(gn-ye)
PE
Ground
Connection WITHOUT capacitor switchgear
If the unit is connected without a capacitor switch-
gear, the two capacitors have to be present in the
switchgear.
The following capacitor sizes need to be used here:
•
Start capacitor: 70 µF, 440 V, 60 Hz
•
Operating capacitor: 35 µF, 440 V, 60 Hz
5.5.4. Three phase AC motor
The three phase version is supplied with bare cable
ends. The connection to line power is made in the
switchgear.
Electrical connections may only be made by a
qualified electrician!
If the pump is fitted with a plug, it is connected
to the power supply by inserting the plug into a
socket.
The following wire assignments apply to the stan-
dard pumps in the PRO series.
Fig. 6.:
Connection diagram: Direct starting P 13 motor
7-wire connection cable
Wire number Terminal Designation
1
10/11
20/21
Temperature monitor for winding
2
3
U
Line power
4
V
5
W
6
DK
Leakage detection for motor com-
partment
Green/yellow PE
Ground
Fig. 7.:
Connection diagram: Direct starting P 17 motor
7-wire connection cable
Wire number Terminal Designation
1
10, 20
Temperature monitoring: Center
terminal
2
11, 21
Temperature monitoring: High
temperature
3
U
Line power
4
V
5
W
6
12, 22
Temperature monitoring: Low
temperature
Green/yellow PE
Ground
Fig. 8.:
Connection diagram: Star-delta starting P 17 motor
10-wire connection cable
Wire number Terminal Designation
1
U1
Line power
2
U2
3
V1
4
V2
5
W1
6
W2
Содержание Rexa PRO Series
Страница 5: ...Fig 9 1...
