WEG SSW-06 - Page 150

CHAPTER 7 - PROGRAMMING INFORMATION AND SUGGESTIONS
150
Figure 7.9 - Manometer showing the pressure drop
9) Generally, the current increases at the end of the deceleration
ramp and in this case the motor requires more torque to achieve
asmoothwaterowstop.Whenthemotorhasalreadystopped,
but is still enabled, the current will increase too much. To prevent
this condition, set P105 to a value that as soon it stop it is also
disabled;
10) Set P610 and P611 to current and time levels that prevent the
hydraulic pump from running without a load.
NOTES!
1) P400 and P401 must be set according to the line voltage and the
nominal current of the used motor;
2) Ifthehydraulicpipingisnotttedwithamanometer,thewater
hammer can be noted at the pressure relief valves;
3) Please consider, that sudden line voltage drops results in motor
torque drops. Thus, ensure that the power supply line characte-
ristics are within the characteristics required for motor operation;
4) If errors are detected during the motor start, check all connections
of the Soft-Starter to the power line, the motor connections, the
voltage levels of the power line, the fuses, circuit-breakers and
disconnecting switches.
Figure 7.10 - Start with pump control
U(V)
Start
Stop
P101
P102
0
Enable
Disable
t(s)
100%Un
Pump Control
P103
P104
P105
Disable
P104
t(s)
0
P103
U(V)
Stop
100%Un
P105
P611
P610
P401
P400
Pump
Control
P105
P104
P103
P102
P101
P130
P640
P406
P620