Siemens 6MD85, Manual

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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