Mounting, installation and connection
29
BA.10A.CNY.001.01.10.GB
4.7.1 Star connection
Star-connection 3-phase system for high voltage.
Connect the pump as specified in the order documents. The
figure below shows the schema for star connection.
4.7.2 Delta connection
Delta-connection for low voltage.
Connect the pump as specified in the order documents. The
figure below shows the schema for delta-connection.
4.7.3 Checking the direction of rotation
after connection
C A U T I O N
!
Danger of dry running!
Dry running causes damages to pump and plant!
•
Before checking of the direction of rotation: fill and vent
the pump.
•
Connect the motor and briefly (for about 2 seconds)
check the direction of rotation.
Note the directional arrow (red) on the pump. If the pump
is turning in the wrong direction the mechanical seal can
be destroyed.
Check the rotating direction in this way:
1. After electrical connection:
Mount all safety equipment again.
2. Check tightness of hydraulic connection.
3. Fill pump (plant).
4. Observe arrow of rotation.
5. Switch on motor short-time (1-2 seconds).
6. Compare directions (motor / arrow).
7. Correct connection if need be.
Operation with frequency inverter
See documentation of manufacturer.
Fig. 11
Star connection
K.
00
79
V
1
U1
V1
W1
W2
U2
V2
L1
L2
L3
Fig. 12
Delta connection
K
.008
0V1
U1
V1
W1
W2
U2
V2
L1
L2
L3
