Section VII Test runing and application
26
Item P2 is set to 0, set stop mode for this mode.
In this stop mode, when the soft starter receive the stop command, immediately
disconnect the bypass contactor and ban soft starter thyristors voltage output, motor
gradually stop as load inertia. In the situation of one drive two(more) wiring, should
set soft starter stop mode as this, in order to avoid of the phase fault reporting when
output switching.
Under normal circumstances, if not necessary soft stop, stop mode should be
free stop model, to extend the life of the soft starter.
As stop model completely ban the instantaneous output, can avoid an
instantaneous high-current impact in special applications.
7-4.
Special application
7-4-1
Motors in parallel Start
：
If not exceed the rated power limit of the soft starter, the motor can be connected
in parallel (motors sum current can not exceed the power of soft starter, the type
selected depending on the application rated current), but at this time should provide
additional thermal protection devices for each motor.
7-4-2
Two-speed motor start
：
PR5200(C) series soft starter can start with two-speed motor, before changing
from low speed to high speed, must be solved by delayed magnetic period, to avoid a
very large reverse current between the line and the motor.
7-4-3
Long cable
：
As the resistance of the cable causes, a very long motor cables could cause
voltage landing, if the voltage drop is very obvious, it will affect the current
consumption and starting torque, when choosing motor and soft starter, must consider
this.
7-4-4
soft starters parallelled with the same one power line
：
If in a power line, installed several soft starters, should install the input reactor
between the wiring of the soft starter and transformer, to the middle of the line should
be . Reactor should be installed between each feeder circuit breaker and soft starter.
7-4-5
Surge protection Device (SPD) application
：
In the applications which may suffer from lightning or other causes that lead to
overvoltage, overcurrent, surge interference, should consider installing a surge
protector, detailed application methods instructions, refer to POWTRAN company
"surge protector (SPD)" Product sample or other relevant data.
7-5.
Application examples
Under different load conditions, parameter settings for example shown in table
7.2. Data in the table is only for reference, should be adjusted according to actual
situation
