Woodward LS-5 v2 Series User Manual

[No] Monitoring for this fault condition is
continuously enabled regardless of
Lock Monitoring Status 24.40.
3295 SyA. decoupling 2 [O󰆞] The QV monitoring function is ignored
in the decoupling function.
Step 1 Tripping of QV monitoring step 1
causes decoupling
Step 2 Tripping of QV monitoring step 2
causes decoupling
4.3.1.13 System A Time-Dependent Voltage
General notes
Voltage is monitored depending on parameter "SyA. voltage measuring" (parameter
1851). This monitoring function is supporting a dynamic stabilization of mains. For this
reason a FRT (Fault-Ride-Through) curve can be de󰈡ned.
Furthermore it can be con󰈡gured either as undervoltage or overvoltage monitoring
(parameter
4953). If the measured voltage of at least one phase (depends on the settings
of parameter 4952) falls below/exceeds the con󰈡gured "Initial threshold" (parameter
4970), the time-dependent voltage monitoring sequence starts and the voltage threshold
will change in time according to the con󰈡gured threshold curve points.
If the measured voltage falls below/exceeds this curve, the monitoring function triggers
and LogicsManager 07.28 becomes TRUE. The system A decoupling function became
active, if con󰈡gured. If the measured voltage falls below/exceeds the con󰈡gured "Fallback
threshold" (parameter 4978) for at least the con󰈡gured "Fallback time" (parameter 4968),
the time-dependent voltage monitoring sequence will be reset.
The threshold curve results from seven con󰈡gurable points and a linear interpolation
between these points. ╚═▷ Fig. 76 shows the default FRT curve for time-dependent
voltage monitoring. The curve shows the device default values according to a typical grid
code requirement.
The time points should always have an ascending order. The fallback threshold
(parameter 4978) should always be con󰈡gured to a value higher/lower than the initial
threshold (parameter 4970).
122 LS-5 v2 Series 37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released

Woodward LS-5 v2 Series Specifications

General

Brand	Woodward
Model	LS-5 v2 Series
Category	Controller
Language	English