9
The processes of automatic identification
of voltage and current source and/or the
automatic identification of capacitor stages
are only carried out when switching on or
pressing the combination of buttons "+",
"-" and "Set" for min. 8 seconds.
(see section 2.1)
Precondition: The automatic identification
mode or the automatic identification of
connected capacitor stages mode are
switched to "ON".
The RM 9606 checks stored stage cur-
rents at specific time intervals during nor-
mal operation. If it recognises that a
capacitor stage has failed, this stage
(stage without capacitance) will be ignored
in future normal operations.
All failed stages are switched on from time
to time in order to re-check their capaci-
tance. If a capacitor stage is added later
on, or defective fuses are exchanged, the
RM 9606 itself identifies this after some
time and the stage is then reintegrated into
the normal operation. However, we
recommend that if capacitor stages are
added at a later date, the set-up procedure
be repeated (see section 2.1).
Note:
In case of low voltage networks being fed
by several transformers switched in
parallel, the capacitor current is distributed
to all the transformers. If measurements
are not carried out via a summation trans-
former, the current change,
measured by the control relay, is too low
when switching on the capacitor stages,
which can lead to errors during the auto-
matic stage identification process. In such
situations we recommend that the stage
identification be switched off and the rele-
vant values be programmed manually.
(see sections 5.5 to 5.8)
2.3 Automatic Setting of Switching
Time Delay
In order to keep the wear of the capaci-
tor's contactors down to a minimum the
response time of the control relay is
lengthened or shortened automatically
according to the frequency of the change
of the load.
2.4 Power Feedback
The RM 9606 is equipped with a four
quadrant control. This means that even
when active power is fed back into the
mains, the control relay ensures compen-
sation for the reactive power which has
been drawn from the mains. In this case
the LED "Regeneration" lights up.
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