Functionality - ABB RELION REX640 Technical Manual

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Protection related functions

Functionality

The binary signal transfer function BSTGAPC is used for transferring binary signals

between the local and remote end line differential protection relays. The function

includes eight binary signals that are transferred in the protection communication

telegram and can be freely configured and used for any purpose in the line differential

application.

BSTGAPC transfers binary data continuously over the protection communication

channel between the terminals. Each of the eight signals are bidirectional and the

binary data sent locally is available remotely as a received signal.

BSTGAPC includes a minimum pulse time functionality for the received binary

signals. Each received signal has its own minimum pulse time setting parameter.

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.

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.

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Functional module diagram

1MRS759142 C

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