ABB RELION REX640 Technical Manual page 1186

Protection related functions
can be used for alarming based on the status of RECV_SIG_1...8. By selecting
the signal mode as "In use, alarm sel.", the received status of the corresponding
signal affects the activation criteria of RECV_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). Each signal
has also the
RECV_SIG_1...8. Also, in case the protection communication supervision detects
a failure in the communication, the RECV_SIG_1...8 outputs are not set to false
sooner than the minimum pulse length defined is first ensured for each signal.
5.5.5 Application
Among with the analog data, the binary data can also be exchanged with the line
differential protection relays. The usage of the binary data is application specific
and can vary in each separate case. The demands for the speed of the binary signals
vary depending on the usage of the data. When the binary data is used as blocking
signals for the line differential protection, the transfer response is extremely high.
Binary signal interchange can be used in applications such as:
• Remote position indications
• Inter-tripping of the circuit breakers on both line ends
• Blocking of the line differential protection during transformer inrush or current
circuit supervision failure
• Protection schemes; blocking or permissive
• Remote alarming
The figure shows the overall chain to transfer binary data in an example application.
The position indication of the local circuit breaker is connected to the protection
relay's input interface and is then available for the relay configuration. The circuit
breaker position indication is connected to the first input of BSTGAPC which is used
to send information to the remote end via communication. In the remote end, this
information is handled as a remote circuit breaker open position and it is available
from the first output of BSTGAPC. This way the information can be exchanged.
1186
Pulse time 1...8 setting that defines the minimum pulse length for
1MRS759142 F
REX640
Technical Manual