Siemens siprotec 7SD5, Руководство пользователя, Страница: 262 / 698

2 Functions
262
7SD5 Manual
C53000-G1176-C169-1
2.12 Direct Remote Trip and Transmission of Binary Information
2.12.1 Functional Description
7SD5 allows the transmission of up to 28 items of binary information of any type from
one device to the others via the communications links provided for protection tasks.
Four of them are transmitted like protection signals with high priority, i.e. very fast, and
are therefore especially suitable for the transmission of external protection and trip
signals which are generated outside of 7SD5. The other 24 are transmitted in the
back-ground and are therefore suitable for any information that does not depend on
high-speed transmission, such as information on the events taking place in a substa-
tion which may also be useful in other substations as well, (see also the specifications
in chapter „Technical Data“).
The information is injected into the device via binary inputs and can be output at the
other ends again via binary outputs. The integrated user-defined CFC logic allows to
perform on both the transmitting and the receiving side logical operations on the
signals and on other information from the protection and monitoring functions of the
devices. Also an internal indication can be assigned via CFC to a transmission input
and transmitted to the remote end(s).
The binary outputs and the binary inputs to be used must be allocated appropriately
during the configuration of the inputs and outputs. The 4 high-priority signals are in-
jected into the device via the binary inputs
„>Remote Trip1“
to
„>Remote
Trip4“
, are transmitted to the devices at the other ends and can be processed at
each receiving side with the output functions
„RemoteTrip1 rec“
to
„RemoteTrip4 rec“
.
The other 24 items of information reach the device via the binary inputs
„>Rem.
Signal 1“
to
„>Rem.Signal24“
and are available under
„Rem.Sig 1recv“
etc.
at the receiving side.
When allocating the binary inputs and outputs with DIGSI
®
you can provide the infor-
mation to be transmitted with your own designation. If, for example, a line has a unit
connected power transformer at one end and you wish to transmit trip by the Buchholz
protection as
„>Remote Trip1“
to the other end, you may use the input and desig-
nate it „Buchholz Trip“. At the other end, you designate the incoming information,
„RemoteTrip1 rec“
e.g. „Buchholz remote“, and assign it to an output trip relay. In
case of Buchholz protection trip, the annunciations will then be given according to your
designations.
Even devices that have logged out functionally (see Section 2.4.1 under margin
heading „Changeover of the Operating Mode“) can send and receive remote informa-
tion and commands.
The annunciations of the devices, e.g.
„Rel1 Login“
of the topology exploration can
be used to determine whether the signals of the sending devices are still available.
They are issued if device x is involved in the communication topology and this state is
stable.
Once a transmission fault has been detected, the time
Td ResetRemote
at address
4512
is started for resetting the remote signals.
No further settings are required for the transmission of binary information. Each device
sends the injected information to all other devices at the ends of the protected object.
Where selection is necessary, it will have to be carried out by appropriate allocation
and, if necessary, by a link at the receiving side.
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