38
WILO SE 05/2016 V05 DIN A4
English INSTALLATION
Fig. 2: Overview of individual components
A Switchgear for direct starting
B Switchgear for star-delta activation
1 Switchgear main switch 5 Fuse protection of
pumps
2 Main printed circuit
board
6
Contactor combina-
tions including motor
protection
3 Terminal strip
7 HAND-0-AUTO- switch
for each pump
4 Earthing rod
5.4.1. Switchgear mains connection
Insert the cable ends of the power supply cable
laid on-site through the threaded cable connec-
tions and secure them accordingly.
Connect the wires to the terminal strip according
to the wiring diagram.
The protective earth conductor (PE) is connected
to the ground rod.
•
Mains connection 1~230 V:
•
Cable: 3-core
•
Wire: L, N, PE
•
Mains connection 3~400 V:
•
Cable: 4-core
•
Wire: L1, L2, L3, PE
• A
clockwise
rotating field must be present!
5.4.2. Pumps mains connection
Insert the cable ends of the pump power supply
cable laid on-site through the threaded cable
connections and secure accordingly.
Connect the wires to the terminal strip according
to the wiring diagram.
The protective earth conductor (PE) is connected
to the ground rod.
•
Direct activation 1~230 V:
•
Wire: L, N, PE
•
Direct activation 3~400 V:
•
Wire: U, V, W, PE
• A
clockwise
rotating field must be present!
•
Star-delta activation:
•
Wire: U1, V1, W1, U2, V2, W2, PE
• A
clockwise
rotating field must be present!
After the pumps have been connected correctly,
the motor protection needs to be adjusted and
the pump enabled.
Adjusting the motor protection
The max. permissible motor current must be set
directly on the overload relay.
• Direct activation
At full load, the motor protection should be set to
the rated current shown on the rating plate.
At partial load, we recommend that the motor
protection be set 5% above the current measured
at the duty point.
• Star-delta activation
Set the motor protection to 0.58 x the rated
current.
The maximum start-up time in star connection is
3 seconds.
Pumps enabled
Set the separate HAND-0-AUTO switch to “AUTO
(A)” in the switch cabinet for each pump. This is
factory-set to the position “0 (OFF)” .
5.4.3. Winding temperature monitoring connection
Bimetal or PTC sensors can be connected to each
connected pump for temperature monitoring.
Connect the wires to the terminal strip according
to the wiring diagram.
NOTE
No external voltage may be applied!
5.4.4. Leakage detection connection
A moisture probe can be connected to each con-
nected pump for leakage detection. The threshold
value is fixed in the switchgear.
Connect the wires to the terminal strip according
to the wiring diagram.
NOTE
No external voltage may be applied!
5.4.5. Connection for level measurement signal trans-
mitter
Level measurement can be performed via three
float switches or a level sensor. Connection of
electrodes is not possible!
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Connect the wires to the terminal strip according
to the wiring diagram.
NOTE
• No external voltage may be applied!
• A max. of 2 pumps can be actuated with level
measurement using a float switch.
• A max. of 4 pumps can be actuated with level
measurement using a level sensor.
5.4.6. Connection of dry-running protection using a
separate float switch
Dry-running protection can be realised using a
float switch via a potential-free contact. The
terminals are fitted with a converter bridge in the
factory.
Insert the cable ends of the cable laid on-site
through the threaded cable connections and
secure accordingly.
Remove the converter bridge and connect the
wires to the terminal strip according to the wiring
diagram.
•
Contact:
•
Connected: No dry run
•
Open: Dry run
Summary of Contents for Control SC-L
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