Measured Values
The measured values of the synchronization function are displayed in separate windows for primary and
secondary measured values and percentages. The measured values are displayed and updated under the
following conditions:
•
when the synchronization function is requested (measurement request)
•
as soon as the function group was enabled via the message
>25-1 act
(170.0001).
Thereby the operation “measurement only” can be realized, since no measurement request is required
and thus no close command is generated.
The following is displayed:
•
Value of reference voltage V
1
•
Value of the voltage to be synchronized V
2
•
Frequency values f
1
and f
2
•
Differences of Voltage, Frequency and Angle.
Table 2-25 Conversion formulae between secondary, primary and percentage values of the
synchronisation function
Measured
values
Secon-
dary
Primary %
V1 V1
sek.
V2 V2
sek.
ΔV ΔV
sek.
20 V
sek.
corresponds to 100 %
Frequencies
f1
f2
Δf
f in Hz
f2 – f1
f in Hz
f2 – f1
1 Hz corresponds to 100 %
Angle differ-
ence
Δα
°el.
α2 – α1
°el.
α2 – α1
45 ° entspricht 100 %
Table 2-26 Legend for the conversion formulae
Parameter Address
Balancing V1/V2
6121
Vnom PRIMARY
202
VT Vn2, primary
6125
Vnom SECONDARY
203
Synchrocheck
Having selected operating mode SYNCHROCHECK the mode verifies the synchronism before connecting the
two system components and cancels the connecting process if parameters for synchronism lie outside the
configured thresholds.
2.21.1.2
Functions
2.21 Synchronization Function
292 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
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