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6.2 Connection messages
In addition to the error messages, the
control relay also displays the results of
its automatic connection recognition.
Messages A1 and A2 can be acknowl-
edged by pressing any key or are auto-
matically acknowledged after a waiting
period of about 30 seconds.
6.2.1 A2 - Incorrect connection that
can be corrected internally
The connection has not been made in
accordance with connection diagrams 3
to 6. However, the problem has been
recognised as a simple confusion in the
phase conductors or in the connection of
the current transformer. The control relay
can continue to operate with this
connection.
6.2.2 A1 - Relative value of the
switch output
The value for the relevant switch output
is displayed while message A1 appears
on the display. Switch outputs at which
little or no capacitor rating has been
recognised
are
assigned
switching
sequence factor 0.0. The user should
check whether the values displayed cor-
respond to the connected capacitor
stage. The connection must be checked
if deviations are extreme. The switching
sequence determined is also stored in
the setup mode (-6-).
6.3 Alarms in automatic control
operation
The ”Alarm” LED (e) lights up for as long
as an alarm is active. If alarm output was
activated on contact 6 of the RM 2106
device or contact 12 of the RM 2112
device (setup code -3-), this contact also
closes. If the alarm status has ended, the
”Alarm” LED turns off and the alarm con-
tact opens again if in use. The message
continues to flash on the display. Press-
ing the ”Voltage thd” key (h) enables the
cause of the alarm to be read out and the
alarm to be acknowledged during or after
the alarm .
6.3.1 E4 - Harmonic overcurrent in
the capacitor
The control relay issues this alarm if the
programmed limiting value for the ”har-
monic overcurrent” (setup code -2-) is
exceeded for more than 1 minute. All ac-
tivated capacitor stages are deactivated.
After the overcurrent falls below the limit-
ing value, the control relay begins to acti-
vate the stages again after waiting about
5 minutes. The maximum overcurrent
factor (I
eff
./I
50/60Hz
) is recorded as the
cause of the alarm.
