Woodward LS-5 v2 Series - 4.3.1.10 System a Voltage Increase

4.3.1.10 System A Voltage Increase
General notes
Voltage is monitored depending on parameter "Monitoring" (parameter 8806). This
function allows the monitoring of the voltage quality over a longer time period. It is
realized as a 10 minute moving average
1
. The function is only active, if system A is within
the operation window. If "SyA. voltage measuring" (parameter 1853) is con󰈡gured to a
three-phase measurement, the slow voltage increase alarm is monitoring the individual
three-phase voltages of the system A according to parameter "AND characteristics"
(parameter 8849). The parameter "SyA. decoupling volt. incr." (parameter 8808)
determines if a voltage increase shall trigger a system A decoupling or not.
If this protective function is triggered, the display indicates "SyA. volt. increase". The
alarm can be incorporated into the system A decoupling function.
The average is set to "SyA. rated voltage" (parameter
1766) if:
• Frequency is not in the operating range OR
• Monitoring (parameter 8806) is "O󰈠" OR
• "Monitoring lockable" is active (parameter 8833) OR
• Monitoring is tripped AND the measured voltage is again in the operating range
Back synchronization is only possible, if:
•
The 10 minute average value is smaller than the de󰈡ned limit AND
•
The actual measured value is inside the operating range AND
•
The system A settling time is over
Please be aware that if "SyA. voltage monitoring" (parameter
1771) is con󰈡gured to "All"
and the system A voltage increase monitoring (parameter 8806) is used, that this
function only monitors "Phase - neutral".
1
Please be aware that this monitoring function was changed with software version
1.01xx or higher. For an older version of this manual please contact our sales support.
ID Parameter CL Setting range
[Default]
Description
8806 Monitoring 2 On Voltage increase monitoring is carried
out according to the following
parameters.
[O󰆞] No monitoring is carried out.
8807 Limit 2 100 to 150 % The percentage voltage value that is
to be monitored is de󰈡ned here.
112 LS-5 v2 Series 37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released