ABB Zenith ZBTS T Series - Page 54

54
Zenith ZBTS T-series 100-1200A, INSTALLATION AND OPERATING INSTRUCTION
1
Alarms, continued from previous page
Message Fault Action
 
threshold level set in parameter “Drop-
out voltage, lower threshold“
Check the correlation between power
source and device configuration
 
threshold level set in parameter “Drop-
out voltage, upper threshold“
Check the correlation between power
source and device configuration
 
missing
Check the power source and
connections
  Check the power source
 
from the value of parameter “Phase
sequence“
Connect the phases according to the
configuration
 
set in parameters “Drop-out frequency,
upper threshold“ and “Drop-out
frequency, lower threshold“
Check the correlation between power
source and device configuration

disconnected

Note: The loss of neutral will be

systems with unbalanced loads
Alarm is active and transfer operations
disabled as long as the frequency
difference is above the accepted level
Frequency Difference Frequency difference of voltage

phase monitor is on

and that the corresponding power
distribution system parameter is set
correctly
High current alarm Measured current is higher than ten
times the nominal value
Alarm is active and transfer operations
disabled as long as the high current
status remains
Open I failure, Alarm
LED blinking
Switch transfer from position I to O or
II failed
Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Close I failure, Alarm
LED blinking
Switch transfer to position I failed Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Open II failure, Alarm
LED blinking
Switch transfer from position II to O or
I failed
Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Close II failure, Alarm
LED blinking
Switch transfer to position II failed Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Switch position alarm,
Alarm LED on
More than one switch position
indication inputs are activated
Switch service needed
Continued on the next page