17
3.1 Preliminary
checks
The electrical wirings should be carried out by AUTHORIZED AND QUALIFIED
PERSONNEL only in accordance with local regulations.
Before to proceed, verify the following steps:
1.
Verify the data on nameplate.
Make sure that the electrical data on the nameplate of the motor corresponds to the
electrical supply.
2.
Verify the grounded power outlet.
The pump must be plugged to a grounded power outlet.
3.
Install a motor protection switch.
Pump must be connected to a motor protection switch (Residual Current Circuit Breaker -
MCCB).
4.
Verify the cable.
Cable type and cross-section must be in accordance to motor data.
5.
Verify the motor rotation.
Start up the pump to check the motor’s direction of rotation. It must comply with that
indicated by the arrow marked on the motor fan cover. If the direction is reversed, rewire
the motor power wires in accordance with the wiring diagram, refer to “3.2 Connection
diagrams”.
3.2 Connection
diagrams
CONNECTION DIAGRAMS for 3
∼
PHASE MOTOR 50 Hz
PE
L1
L2
L3
U1
V1
W1
W2
U2
V2
“Y” CONNECTION
380-420 Vac
PE
L1
L2
L3
U1
V1
W1
W2
U2
V2
“
∆
“ (
DELTA) CONNECTION
220-240 Vac
3. ELECTRICAL WIRING
