BSTGAPC includes two alarm output signals. The SEND_SIG_A output signal is
updated according to the status of the sent binary signals. The RECV_SIG_A output
signal is updated according to the status of the received binary signals. Each
signal can be separately included or excluded from the alarm logic with a setting
parameter.
5.5.4 Operation principle
The
Signal 1...8 mode
setting can be used for changing the operation of the
bidirectional signal channel. The signal channel can be disabled by setting the
corresponding parameter value to “Not in use”. When the signal channel is disabled
locally or remotely, the corresponding RECV_SIG_1...8 signal status is always false
on both ends.
Figure 677: Functional module diagram
Binary signal send
The status of the inputs is continuously sent in the line differential protection
telegrams. SEND_SIG_A can be used for alarming based on the status of
SEND_SIG_1...8. By selecting the signal mode as "In use, alarm sel.", the
sending status of the corresponding signal affects also the activation criteria of
SEND_SIG_A. Further, in case more than one signal channels are selected into the
alarm logic, the activation criteria can be defined according to "Any of selected"
(OR) or "All of selected" (AND).
Binary signal receive
The function receives continuous binary data within the protection telegrams from
the remote end protection relay. This received binary data status is then available
as the RECV_SIG_1...8 outputs on the local end protection relay. RECV_SIG_A
1MRS759142 F
Protection related functions
REX640
Technical Manual
1185
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