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Phase rotation was detected to be wrong. L2
and L3 phases will be internally inverted. Press
OK to validate.
Error: Step size too small
Error: CT not sensing any current
Error: Load changing too fast
Error: Too wide phase dispersion in input nr 'X'
'Y' 'Z'
Error: At least two CT input sensing the same
line current
Error: No significant current in input nr
'X' 'Y' 'Z'
Error: Inconsistent phase shift
Error: Unbalanced step or CT ratio different in
lines for output nr 'A' 'B' 'C' 'D'...
Error: Too big step difference"
A4. Post Alarm Restarting Procedure
Once a protection level is reached (see paragraph 4.3.1.4.1) or when the internal temperature is higher than 85°C:
– all the capacitor steps are switched off
– an alarm message appears on the LCD display
– the alarm relay opens
When the alarm condition disappears, the RVT will automatically restart.
The restarting procedure will depend on the type of event that caused the alarm, as indicated in the following table:
Event having occurred
Urms < Umin prot
Power outage
Urms > U max prot.
Temp internal > 85°C
STATUS
Approved
Press OK
Adapt the step size or the CT ratio.
Check that the CT's short-circuit bridges is removed, that CT's
connections are correctly wired and start the Auto commission-
ing again.
Restart the Auto commissioning procedure under more stable
conditions or set the parameters manually.
For each CT input and for each output, phase recognition is
done and phase dispersion is checked.
Check capacitor and contactor connections.
Check capacitor currents for each phase.
Check CT's installation
Check that CT's short-circuit bridge is removed , that CT's con-
nections are correctly wired and start the Auto commissioning
again
Check CT's connections and installation.
Check capacitor and contactor connections.
Check capacitor currents for each phase.
Check that CT's ratios are the same value.
Check capacitor and contactor connections.
Check capacitor currents for each phase.
Check sequence and reactive power value per output.
RVT restart behavior after event has disappeared
- Opens alarm relay immediately
- Resumes normal behavior after a time equal to ON-Delay(*)
- Resumes normal behavior after a time equal to Reset-delay(*)
- Opens alarm relay immediately
- Resumes normal behavior after a time equal to ON-Delay(*)
- Event considered as disappeared, when Temp internal < 80°C
- Opens alarm relay immediately
- Resumes normal behavior after a time equal to ON-Delay(*)
SECURITY LEVEL
Public
PO WER FACTO R CON TR O LL ER RV T
DOCUMENT ID
9AKK107045A9645
REV.
LANG.
PAGE
D
en
78/542
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