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RVS-DX, Digital Soft Starter Instruction Manual—04/01/04
7-3
Start-Up Procedure
NOTE: If the motor is NOT connected to the load terminals, the “WRONG CONNECTION” fault
indication will appear on LCD display.
Start-Up Procedure:
1. Connect an N.O. maintained push button from terminals B1 to A2.
2. Connect control power to terminals A1 and A2. (ON LED should illuminate.)
3. Reveiw all parameters with “Mode” and “Select” keys and set parameters as required.
4. If necessary, return to Default Parameters (see page 6-5, “Service” Mode).
5. Connect main voltage to starter’s line terminals (L1, L2, and L3), and motor to load terminals
(U, V, and W).
6. Set LCD to show “% OF MOTOR FLA”.
7. Press the “Start” button. If motor starts to turn shortly after the start signal proceed to Step 8. If
the motor does not begin turning, increase the “Initial Voltage” and press “Start” again. When
starting if initial inrush and mechanical shock are too high, decrease “Initial Voltage” setting,
and proceed to Step 8.
8. Motor has begun to turn. If speed accelerates to nominal proceed to Step 9. If the motor speed
does not accelerate to nominal, increase the “Current Limit” setting. If the current during
acceleration process is too high, decrease the “Current Limit” setting, and proceed to Step 9.
9. Press the “Soft Stop” button and wait for the motor to stop.
10. Slightly increase the “Initial Voltage” and “Current Limit” settings to allow for load changes.
11. Press “Start” button and see that the motor “Acceleration Time” to full speed is as required.
12. If acceleration time is too short, increase “Acceleration Time” setting as required.
13. Check the total starting time and set “Max. Start Time” to approximately 5 seconds longer than
the maximum time required to start the motor.
14. Repeat the same for the soft stop process.
NOTE: When power factor correction capacitors are used, they must be installed on the soft
starter line side.
Examples of starting curves
Light Loads-Pumps, Fans, etc.
Initial Voltage (IV)-set to 30% (Factory Default)
Current Limit (CL)-set 300%
Acceleration Time (AT)-set 5 sec.
Voltage quickly increases to the Initial
Voltage value and then gradually ramps-
up to nominal. Current simultaneously
and smoothly increases to reach Current
Limit setting or less, before smoothly
decreasing to the operating current.
Motor speed will accelerate to full speed
quickly and smoothly.