Siemens 6MD85, Manual

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Figure 6-66 Transformer Between the Measuring Points
If there is a power transformer between the voltage transformers of the circuit breaker to be synchronized,
you then have to correct the phase-angle rotation for a vector group deviating from 0.
Figure 6-66 shows such
an application. The
Angle adjust. (transform.)
parameter is used to save the phase-angle rotation.
The vector group of the transformer is defined by the upper voltage side to the lower voltage side. If the refer-
ence voltage transformer V1 is connected on the upper voltage side of the transformer (as in
Figure 6-66 ),
enter the phase-angle rotation directly according to the vector group. A vector-group figure of 5, for example,
means an angular rotation of 5 ⋅ 30
o = 150 o . Set this value for the
Angle adjust. (transform.)
param-
eter.
If the voltage connection V1 is on the lower voltage side due to the system, you then have to apply the exten-
sion angle with 360
o . A transformer with vector group 5 yields an angular adjustment of 360 o –
(5 ⋅ 30 o ) = 210 o
2. Correction of phase-angle errors: You can correct a phase-angle error between the voltage transformers in
increments. Ascertain a possible correction value during commissioning.
Parameter: CB make time
•
Default setting
(_:5041:113) CB make time
=
0.06 s
If you are to interconnect under asynchronous system conditions with the device as well, the closing time of
the circuit breaker must be taken into account. The device uses this to calculate the time of the direct close
command, so that the voltages are in phase at the moment of closure of the switch poles. Note that apart
from the operating time of the switch, this also includes the pickup time of an auxiliary relay that may be
upstream. You can determine the closing time using the protection device (see commissioning notes in
chapter
10.2 Primary and Secondary Testing of the Synchronization Function ).
This parameter only occurs for the stage type Synchronous/asynchronous.
Settings
Addr. Parameter C Setting Options Default Setting
General
_:2311:127 General:Angle adjust.
(transform.) -179.0 ° to 180.0 ° 0.0 °
6.4.4.3
Control Functions
6.4 Synchronization Function
SIPROTEC 5, High-Voltage Bay Controller, Manual 371
C53000-G5040-C015-9, Edition 11.2017