salmson Smart Control SC-L Einbau- Und Betriebsanleitung Seite 40

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• 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 onsite
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 pro-
tection 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 cur-
rent shown on the rating plate.
At partial load, we recommend that the motor protection be set
5 % above the current measured at the operating 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
Bimetallic or PTC sensors may be connected 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
Up to 2 electrodes can be connected for leakage detection.
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 detection signal transmitter
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 onsite 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 mea-
surement using a float switch.
• A max. of 4 pumps can be actuated with level mea-
surement 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 onsite through the threaded
cable connections and secure accordingly.
Remove the converter bridge and connect the wires to the termi-
nal strip according to the wiring diagram.
• Contact:
• Connected: No dry run
• Open: Dry run
NOTE
• No external voltage may be applied!
• We recommend dry-running protection always be
provided as additional fuse protection for the unit.
• When using a level sensor for level control, forced ac-
tivation of the pumps only takes place when dry-run-
ning protection is realised via a separate float switch.
5.4.7. Connection of the high water alarm using a separate
float switch
A high water alarm can be realised via a potential-free contact
using a float switch.
Insert the cable ends of the cable laid onsite through the threaded
cable connections and secure accordingly.
Connect the wires to the terminal strip according to the wiring
diagram.
• Contact:
• Closed: High water alarm
• Open: No high water alarm
NOTE
• No external voltage may be applied!
• We recommend high-water protection always be
provided as additional fuse protection for the unit.
• When using a level sensor for level control, forced ac-
tivation of the pumps only takes place when the high
water alarm realised is via a separate float switch.
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