11 Annex
11.5 Variable frequency drives for single-phase AC motors
186 DC1 variable frequency drive 12/13 MN04020003Z-EN www.eaton.com
Follow the steps below in order to obtain a reliable start:
1. Connect the motor to the variable frequency drive correctly.
2. Set the motor's rated operational voltage (P-07) and the rated motor
current (P-08) correctly (see the information on the nameplate).
3. Open the extended parameter set with P-14 = 101.
4. Set boost time P-33 to its maximum value of 150 s.
5. Start the variable frequency drive and have the display show the motor
current (to do this, press the OK button until "A x.x" is shown).
6. About 3 to 5 seconds after the unit starts, compare the motor current
with the rated motor current. Then follow the scenario that applies:
a) The motor current is less than 80% of the rated motor current:
• Stop the variable frequency drive
• Increase the value in P-11
• Repeat, starting from step 5
b) The motor current is more than 90% of the rated motor current:
• Stop the variable frequency drive
• Reduce the value in P-11
• Repeat, starting from step 5
Check to make sure that once the boost start voltage is set correctly,
the current falls between 80% and 90% of the rated motor current
about 3 to 5 seconds after the unit starts.
Now reduce boost time P-33 in the direction of the value required for the
motor start. The ideal boost time will be a few seconds longer than the
time for the motor start.
￫
For more information and technical data on DC1-S-… variable
frequency drives, please refer to instructional leaflets
IL04020014Z and IL040001ZU.
To Next Page
Loading...
