Siemens siprotec 7SA522 User Manual

2 Functions
124
7SA522 Manual
C53000-G1176-C155-3
2.5 Remote signals via protection data interface (optional)
2.5.1 Description
7SA6 allows the transmission of up to 28 items of binary information of any type from
one device to the other via the communications links provided for protection tasks.
Four of 28 information items are transmitted like protection signals with high priority,
i.e. very fast, and are therefore especially suitable for the transmission of external pro-
tection and trip signals which are generated outside of 7SA522. 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 substation which may also be useful in other substations as well.
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.
The binary outputs and the binary inputs to be used must be allocated appropriately
during the configuration of the input and output functions (see SIPROTEC
®
4 System
Description). The 4 high-priority signals are injected into the device via the binary
inputs ´!5HPRWH7ULSµ to ´!5HPRWH7ULSµ, transmitted to the devices at the
other ends and can be processed at each receiving side with the output functions
´5HPRWH7ULSUHFµ to ´5HPRWH7ULSUHFµ.
If the remote signals are to be used for direct remote tripping, they must be allocated
at the send side via CFC with the function that is to perform the transfer trip at the op-
posite side, and at the receiving side, also via CFC, with the “>Ext. TRIP ...” input sig-
nals.
The other 24 items of information reach the device via the binary inputs ´!5HP
6LJQDOµ to ´!5HP6LJQDOµ and are available under ´5HP6LJUHFYµ etc.
at the receiving side.
For the transmission of binary information no settings are required. Each device sends
the injected information to all other devices at the ends of the protected object, al-
though the protection data topology is incomplete. Where selection is necessary, it will
have to be carried out by appropriate allocation and, if necessary, by a link at the re-
ceiving side.
Even devices that have logged out functionally (Functional Logout) can send and
receive remote signals and commands.
The annunciations Dev x available of the topology detection function can be used to
determine whether the signals of the sending devices are still available. They are
issued if device x is actively involved in the communication topology and this state is
stable.
Once a fault has been detected in the communication of the protection data interface,
the time at address  7G5HVHW5HPRWH is started for resetting the remote sig-
nals.

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English