CHAPTER 7 - APPLICATIONS AND PROGRAMMING
127
7.1.5
Starting with Pump Control
(P202=2)
1) To start with pump control a load is necessary. Tests without a load
can be done with voltage ramp;
2) The parameter setting depends mainly of the types of hydraulic
installations. Thus we recommend to optimizing factory settings, if
possible.
3) Check if the motor rotation direction is an indicated on the pump
frame. If not, connect the phase sequence as indicated at P620;
Figure 7.7
– Direction of rotation of a hydraulic centrifugal pump
4) Set the initial voltage - P101 – so the motor starts smoothly as
soon as it is enabled.
5) Set the acceleration time according to its application, i. and., that
the motor is able to start the load smoothly, but the required
acceleration is not exceeded. If acceleration times are set too long,
this may result in vibration of harmful motor overheating;
6) To check the correct starting process, always use a manometer in
the hydraulic installation. Pressure increase should not result in
sudden oscillations. Thus the pressure increase should be as line-
ar as possible;
7) Program the voltage step during the deceleration process only when
no pressure drop is detected at the deceleration begin. With this
deceleration voltage step you can improve the pressure drop during
the deceleration process;
8) Set the deceleration time according to the application, i. and.,
ensuring that the pump stops smoothly within the expected limits.
The set of excessively long times may result in vibrations or harmful
motor overheating;
Figure 7.8
– Manometer showing pressure increase
Enable
P102
Pump Control
0
P101
U(V)
Start
100%Un
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]
