CHAPTER 7 - APPLICATIONS AND PROGRAMMING
128
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 flow 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 stoop 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
rated current of the used motor used;
2) If the hydraulic piping is not fitted with manometer, the hydraulic
rams 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 characteristics
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
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
