Synchrocheck - Siemens SIPROTEC 4 User Manual

Functions
2.21 Synchronization Function
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
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
•
Value of the voltage to be synchronized V
•
Frequency values f
•
Differences of Voltage, Frequency and Angle.
Table 2-25
Measured
values
V1
V2 V2
ΔV ΔV
Frequencies f in Hz
f1
f2
Δf f2 – f1
Angle differ- °el.
ence
Δα
α2 – α1
Table 2-26
Parameter
Balancing V1/V2
Vnom PRIMARY
VT Vn2, primary
Vnom SECONDARY
2.21.1.2

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.
292
1
and f
1 2
Conversion formulae between secondary, primary and percentage values of the
synchronisation function
Secon-
dary
V1
sek.
sek.
sek.
f in Hz
f2 – f1
°el.
α2 – α1
Legend for the conversion formulae
Address
6121
202
6125
203
>25-1 act (170.0001).
2
Primary %
20 V corresponds to 100 %
sek.
1 Hz corresponds to 100 %
45 ° entspricht 100 %
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016