4. Test Run and Application
EM-GU User’s Manual
16
4. Test Run and Application
Please do some examinations before test running as following:
⚫
Whether the rated power of soft starter is matched with the Motor.
⚫
Whether the insulation of motor meets requirement.
⚫
Whether the main circuit connection of input and output is correct.
⚫
Whether all the screws of terminals are twisted tightly.
4.1 Power on to Test Running
●
The "Ready" state is displayed when power on, press
Running key to start the motor.
●
Set
F02
be same as motor nameplate rated current.
●
After started the motor, you should examine whether the motor running direction is correct, or whether runs
normally. If not, you can press
key or cut off the power to stop running.
●
If the soft starter starting state is not satisfied, please select the appropriate starting mode and starting time.
●
If the start torque is not enough, you can change start mode to torque start to improve start torque.
●
Do not open the face cover in case of electric shock.
●
If abnormal phenomena such as abnormal sound, smoke or odour are found during the trial operation of the
soft starter, the power supply should be cut off at once and the cause investigated.
●
If the Trip light on after power-up or at start-up, you can check chapter 3.3 to find out reason.
●
Press
key or external stop button can reset the error state.
Note
: When ambient temperature is less than -10
o
C, the starter should be power on to preheat for 30 minutes,
and then to start.
5.2 Special Application
⚫
In parallel the starting of the motors:
If the motors total power is less than 80% of soft starter, the motors
can be parallel connection. But at this time should be also provides for each motor thermal protection device.
⚫
Double speed motor:
Motor soft starter can cooperate with double speed motor starting, must go through
demagnetization delay period before change from low speed to high speed, to avoid anti-phase current
generated between the lines and motor.
⚫
Too long cable:
f the cable is too long, the cable voltage drop will be high, and that will increase current loss
and reduce starting torque, so please use big KW soft starter and motor.
⚫
Soft starter parallel connected with one power-line:
If several soft starters parallel installed in the one power
line, the input line reactor should be installed in the middle of the transformer and the soft starter circuit. Reactor
should be installed at each line input side between circuit breaker and soft starter.
⚫
The application of surge protection device (SPD):
The surge protection device should be considered to
installed in the application case, where is easily caused trouble by lightning or other reasons, such as over
voltage, over-current, surge interference. Please refer to SPD related documents for details.
