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The parameter can be applied under the following conditions:
•
1. Phase-angle rotation by power transformer between the measuring points
•
2. Correction of phase-angle errors
1. Phase-angle rotation by power transformer between the measuring points:
[losynae1-160311-01.tif, 1, en_US]
Figure 8-60
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.
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
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
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
(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
11.12 Primary and Secondary Testing of the Synchronization
This parameter only occurs for the stage type Synchronous/asynchronous.
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
Transformer Between the Measuring Points
o
= 150
o
. A transformer with vector group 5 yields an angular adjustment of 360
o
. Set this value for the Angle adjust. (transform.) param-
Control Functions
8.4 Synchronization Function
Figure 8-60
Figure
o
–
Function).
shows such
8-60),
1137
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