ABB RELION REX640 Technical Manual page 1185

Protection and control

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1MRS759142 F

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

Operation principle

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

Technical Manual

Signal 1...8 mode setting can be used for changing the operation of the

Protection related functions