Chapter 7 Test runing and application
22
mode and application to select appropriate starting model.
7-1-2.
If the motor starting torque is not enough, you can change the starting voltage
(voltage mode) or current-limiting value (current mode), to improve the motor starting torque.
7-1-3.
When soft starter power on, do not open the cover, to avoid electric shock.
7-1-4.
In the power test of running, if appearing unusual phenomena, such as abnormal noise,
smoke or odor, etc., should be quickly cut off the power and make further investigation.
7-1-5.
If power on or when starting, appearing failure light and display errxx, you can find
the reason according to the displayed fault code and the corresponding chapter of the cause.Press
the stop button or external stop button to reset the fault status.
Note:
1). When the ambient temperature is below -10
℃
, should power on for more than 30 minutes
to warm-up before starting.
2). When the soft starter drive the motor successfully, the operation status indicator on the
middle panel lights, that proves the bypass is in running status. If at this time, the motor stop by
bypass contactor without actuation,y ou should check the bypass contactor and associated wiring
connection.
7-2. PR5200(C) series soft starter starting mode and application
PR5200(C) series soft starter has Seven models to suit a variety of complex starter motor and
load conditions, the user can choose it as different application.
7-2-1 Current limit starting mode
When setting PB to 0, set the start mode for this mode.
Figure 7.2 shows the current limit mode of the motor
starting current waveform changes. I1 is starting current
limit by setting, when the motor starts, the output voltage
rapidly increases, till the motor current reaches the
current limit value I1, and maintain the motor current is
not higher than this value, then gradually as the output
voltage increased, gradually accelerate the motor, when the
motor reaches the rated speed, the bypass contactor make
actuation, output current rapidly dropped to or below the
motor rated current Ie, starting process is complete.
When the motor is lightly loaded or setting the current
limit highly, the maximum starting current may not reach
the set limit value is normal. Figure 7.2
Current limit starting mode is generally used for a strictly limited starting current
requirements of the occasion.
7-2-2 Voltage ramp start model
When P9 setting item is 1, start mode is for this mode.
Figure 7.3 shows the output voltage waveform as voltage
ramp start voltage waveform. U1 is the initial starting voltage
of starting, when the motor start, the motor current does not
exceed 400% of rated range, the output voltage of soft starter
quickly rise to U1, then the output voltage gradually increase
by the start parameters setting, the motor is in smooth
acceleration according to voltage continuously rise, when the
voltage reach the rated voltage Ue, the rated motor speed,
bypass contactor act, starting process is complete. Figure 7.3
Starting time t is based on standard load obtained in the
standard experimental conditions,
control parameters, PR5200(C) series soft starter is based on this parameter benchmark, by
controlling the output voltage, make the motor speed up in a smooth start-up process, not a
mechanical control, regardless of time t. Acceleration is smooth. In view of this, when the load is
light, set the start time often less than the starting time, as long as a smooth start is normal.
T
I
I1
Ie
0
T
U
Ue
U1
0
t
Summary of Contents for PR5200 Series
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