frako RM 2106 - I = 0 - No Measuring Current

Alarms and troubleshooting
37
6.3.1 E4 - Harmonic overcurrent in the
capacitor
The control relay issues this alarm if the
programmed limiting value for the ”harmonic
overcurrent” (setup code -2-) is exceeded for
more than 1 minute. All activated capacitor
stages are deactivated.
After the overcurrent falls below the limiting
value, the control relay begins to activate 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.
6.3.2 E5 - Target power factor not reached
If the operating point of the control relay is
above the control band (see section 4.1) and
if all available capacitor stages have already
been activated, the control relay issues
error message E5 after a delay. The lowest
measured power factor during the alarm is
recorded as the cause of the alarm.
This alarm can be suppressed at setup code -3-.
( see section 4.3 )
6.3.3 E1 - Defect capacitor stages
After initial start-up or ”check system” procedure,
the determined stage ratings are stored in a non-
volatile memory (only when automatic response
current identication is active; setup code -4-).
If the control relay detects a drop in stage rating
during operation of more than 20% or there is
an extremely asymmetrical current in the three
phases of a capacitor stage, it registers these
stages as defect. The defect stages can be
read out as the cause of the alarm.
Note:
This function only works if automatic
response current identication is active.
6.3.4 U = 0 - No measuring voltage
This message indicates that the control relay
with connected ”Meas” terminal has been
put into operation, however no voltage can be
measured at this input at present.
It is not possible to read the cause of the
alarm. Likewise this message can only be
acknowledged by eliminating the error.
6.4 I = 0 - No measuring current
If the current in the current measurement
path drops below 20 mA, the message ”I=0”
appears on the display.
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