Chapter 7 Test runing and application
23
In general, the voltage ramp start mode is suit to not strict starting current requirement and
strict demanding of a smooth start of the occasion.
7-2-3 Kickstart mode
P9 setting item set to 2 or 3, starter model is for this mode.
T
C
Un100%
U1
0
100ms
T
C
Un100%
U1
0
100ms
Figure 7.4 Figure 7.5
Figure 7.4 and Figure 7.5 shows the kickstart mode waveform of the output. In some heavy
load situations, due to mechanical effects of static friction, when it can not start the motor, you can
use this start mode. At the start, imposing a high fixed voltage to the motor first and last for a
limited period of time, to
Before using this model, start motor with non-sudden jump model, if the motor can not move
due to static friction, then use this model; otherwise avoid to
start this mode to reduce the unnecessary high current impact.
7-2-4 Current ramp start mode
P9 items set 4, start mode is for this mode.
Figure 7.6Sshows the current ramp start mode output
current waveform, which I1 is the current limit set P6, T1 value
is the time set by P1.
Current ramp start mode has a strong acceleration ability,
for bipolar motors, can also shorten the start-up time within a
certain range. Figure 7.6
7-2-5 The voltage limiting double loop start mode
Set P9 as 5 to set start mode for this mode.
Double loop starting voltage limiting mode adopt voltage ramp and current limit dual closed-
loop control model, is both stable requires and strict current limiting demanding, the integrated
starter-limiting mode, it uses the prediction algorithm to estimate the work status of the motor.
In this start mode, output voltage waveform will be based on the motor and load conditions
vary.
7-2-6 Monitor start mode
Started in this mode will run in direct starting, can monitor the operation of the motor current
and other parameters, when running overload, overvoltage or undervoltage, fault output 5,6
terminal to cut output, also shows the corresponding fault information.
7-3. PR5200(C) series soft starter's stop mode and application
PR5200(C) series soft starters, there are two stop modes, soft-stop mode and free stop mode.
7-3-1
Soft stop mode
When Setting item P2 is not zero, set the stop mode for this mode.
In this stop mode, the motor power start from the bypass contactor and switch to the output of
soft starter thyristor, soft starter output voltage decrease steadily from the total pressure, reducing
the motor speed steady in order to avoid mechanical shock, till the motor stops running. Soft stop
output cut-off voltage equal to the initial voltage of starting.
Soft stop mode can reduce and eliminate the surge of pump type load.
Soft stop mode can use setting item PF to set the soft stop current limit, in soft stop, reduce
T
I
I1
Ie
0
T1
Summary of Contents for PR5200 Series
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