Closing at De-Energized Line/Busbar
Description
If at least one of 2 parts of an electrical power system is de-energized, the parts of the electrical power system
can be connected together via the following operating modes.
If the measured voltage is less than the threshold V1, V2 without voltage, the zero potential of the part
of the electrical power system is detected. In this case, all phases are compared to the parameter V1, V2
without voltage. The energized side must be in the defined operating range with respect to voltage and
frequency (see chapter 6.4.4.1 Description) and all phases must exceed the threshold V1, V2 with
voltage.
The following additional closing conditions can be selected, which are then applied next to the closing condi-
tions for the synchronism:
Settings Description
Close cmd. at V1> & V2<
Closing release under the condition that the part V
1
of the power
system is energized and the part of the electrical power system
U
2
is de-energized.
Close cmd. at V1< & V2>
Closing release under the condition that the part V
1
of the power
system is de-energized and the part of the electrical power
system U
2
is energized.
Close cmd. at V1< & V2<
Closing release provided mains adapters V
1
and V
2
are de-ener-
gized.
Each of these conditions can be made effective individually via parameters or binary input. You can also set
parameters for combinations, for example a release for closure, if Close cmd. at V1> & V2< or Close
cmd. at V1< & V2> has been fulfilled.
6.4.11
6.4.11.1
Control Functions
6.4 Synchronization Function
SIPROTEC 5, High-Voltage Bay Controller, Manual 409
C53000-G5040-C015-9, Edition 11.2017
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