VS65 SERIES MV SOFT STARTER
POWER ELECTRONICS
42
CONFIGURATION, LOW VOLTAGE TRIAL AND COMMISSIONING
8.2.3.
Test process
This process consists on two similar tests with different output components during each start.
•
Use the three bulbs to realize the first test.
•
The three-phase motor from 1 to 10CV should be connected in parallel with the three bulbs
to realize the second test.
8.2.4.
Test
•
Keep pressed the inferior door switch during the test. Otherwise, the soft starter will not
start.
CAUTION
When the door is opened and the door switch is pressed the personal protections of the
equipment are disabled. These tests must be always made by qualified personal of Power
Electronics.
•
Turn on the circuit breakers located in the low voltage cabinet. That will turn on the red light
“power on”.
•
Close the superior door and keep the main door opened. Select the soft start mode LOCAL.
The display, the electronic board, the white pilot “soft starter ready” and the red pilot “soft
starter stopped” will be turned ON.
•
Push the green button “start”. The soft starter applies a start ramp (the display will show it).
It’s recommended to make a visual inspection of the trigger boards. Their leds will be
enabled showing their correct interconnection and the correct thyristors’ trigger. Check that
the start is progressive. For example, in the case of the bulbs test, they make a progressive
increase of its illumination.
•
When the start ramp is finished, the bypass contactor will be enabled and the line contactor
will work for 1 second before being disabled. The green pilot “soft starter running” will be
turned on, and the red pilot “soft starter stopped” and the white pilot “soft starter ready” will
be turned off. The equipment is at this moment working in bypass mode until it has to stop.
•
To stop the soft starter, push the red “stop” button. The line contactor will be enabled and
the bypass contactor will be working for a second and then disabled.
•
During the deceleration ramp, check another time if the trigger boards’ leds are turned on
like in the start ramp.
•
When the deceleration ramp is finished, the green pilot “soft starter running” will be turned
off, and the white pilot “soft starter ready” and the red pilot “soft starter stopped” will be
turned on.
•
After making the two tests, stop pressing the door switch.
8.2.5.
Test ending and Medium voltage connection
•
Disconnect the low voltage transformer.
•
Connect the medium voltage transformer cables as they were at the beginning.
•
Disconnect the resistors of 300k
Ω
of the trigger boards.
•
If the tests are correctly performed, the equipment is ready to begin the medium voltage
start.
•
CLOSE the soft starter doors and verify that all of the safety devices are active and there is
no risk present when the motor starts.
•
Start the equipment with medium voltage in the required mode.
•
Set the display parameter groups G2, G4 and G5 (check the VS65 Programming and
Software manual for more information) and the equipment will be ready to start the motor
with medium voltage.