Operating Range
[losyn002-160311-01.tif, 1, en_US]
Figure 8-59
Logic of the Operating Ranges
The operating range of the synchronization function is defined by the configurable voltage limits Min.
operating limit Vmin and Max. operat. limit Vmax as well as by the specified frequency band
f
rated
±4 Hz.
If one or both voltages are outside the permitted operating range when the measurement is started or a
voltage leaves the range, this is displayed via corresponding indications Frequency f1 > fmax,
Frequency f1 < fmin, Voltage V1 > Vmax, Voltage V1 < Vmin etc. The closing conditions are
then not checked.
Supervision
The supervisions listed below are executed in a function-specific manner. If one of the monitors picks up, the
Health goes to alarm. The stage is indicated as Inactive. A closing release or direct close command is not
possible in this case.
•
For consistency of settings of specific parameters
Definite threshold-value settings are checked after a parameter change. If there is an inconsistency, the
error message Setting error is set.
•
For multiple selection of the stage at the start time of the synchronization
If there is a simultaneous selection of multiple closed synchronization stages at the start time, the error
message Multiple selection is set.
Measuring-Voltage Failure
If a voltage-transformer fault (measuring-voltage failure) is recorded via the binary input signal >Open of one
of the voltage-measuring points, then the closing commands of the synchronization stage are no longer
tested. In other words, a release of the closure based on the measurement is no longer possible. The readiness
of the stage turns to warning. Direct close command is still possible.
The device-internal supervision function measuring-voltage failure detection (Fuse Failure Monitor) does not
have any effect on the synchronization stage.
Control Functions
8.4 Synchronization Function
SIPROTEC 5, Overcurrent Protection, Manual 1133
C53000-G5040-C017-8, Edition 07.2017
To Next Page
Loading...
