Additional Connections - GE AF-600 FP Operating Instructions Manual

Electrical Installation
Stop the auto tune during operation
1. Press the [OFF] key - the frequency converter
enters into alarm mode and the display shows
that the auto tune was terminated by the user.
Successful auto tune
1. The display shows "Press [OK] to finish auto
tune".
2. Press the [OK] key to exit the auto tune state.
Unsuccessful auto tune
1. The frequency converter enters into alarm mode.
A description of the alarm can be found in the
Warnings and Alarms chapter.
2. "Report Value" in the [Alarm Log] shows the last
measuring sequence carried out by the auto
tune, before the frequency converter entered
alarm mode. This number along with the
description of the alarm will assist you in trouble-
shooting. If you contact GE for service, make sure
to mention number and alarm description.
NOTE
Unsuccessful auto tune is often caused by incorrectly
entering motor name plate data or a too big difference
between the motor power size and the frequency
converter power size.
Step 4. Set speed limit and accel/decel times.
F-52 Minimum Reference
F-53 Maximum Reference
Set up the desired limits for speed and ramp time
F-18 Motor Speed Low Limit [RPM] or F-16 Motor
Speed Low Limit [Hz]
F-17 Motor Speed High Limit [RPM] or F-15 Motor
Speed High Limit [Hz]
F-07 Accel Time 1
F-08 Decel Time 1
AF-600 FP High Power Operating Instructions

3.5 Additional Connections

3.5.1 Parallel Connection of Motors
The frequency converter can control several parallel-
connected motors. The total current consumption of the
motors must not exceed the rated output current I
the frequency converter.
NOTE
Installations with cables connected in a common joint as in
the illustration below, is only recommended for short cable
lengths.
NOTE
When motors are connected in parallel, P-04 Auto Tune
cannot be used.
NOTE
The electronic thermal overload of the frequency converter
cannot be used as motor protection for the individual
motor in systems with parallel-connected motors. Provide
further motor protection by e.g. thermistors in each motor
or individual thermal relays (circuit breakers are not
suitable as protection).
Problems may arise at start and at low RPM values if motor
sizes are widely different because small motors' relatively
high ohmic resistance in the stator calls for a higher
voltage at start and at low RPM values.
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M,N
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