Application - ABB RELION SMU615 Technical Manual

Control functions
capacity and bandwidth than the SBO method, because the procedure needs fewer
messages for accurate operation.
The "status-only" mode means that control is not possible (non-controllable) via
communication. However, it is possible to control a disconnector (DCXSWI) from
AU_OPEN and AU_CLOSE inputs.
Selected
to operate
Figure 136: Control procedure in the SBO method
Local/Remote operations
The local/remote selection affects CBXCBR, DCXSWI and ESXSWI.
• Local: the opening and closing via communication is disabled.
• Remote: the opening and closing via communication is enabled.
• AU_OPEN and AU_CLOSE inputs function regardless of the local/remote selection.
8.1.5

Application

In the field of distribution and sub-transmission automation, reliable control and
status indication of primary switching components both locally and remotely is
in a significant role. They are needed especially in modern remotely controlled
substations.
Control and status indication facilities are implemented in the same package
with CBXCBR, DCXSWI and ESXSWI. When primary components are controlled in
234
AU_OPEN and AU_CLOSE control the object directly regardless of the set
Control model . These inputs can be used when control is wanted to be
implemented purely based on ACT logic and no additional exception
handling is needed. However, in case of simultaneous open and close
control, the open control is always prioritized.
REF 615
1. Send reservationto other terminals
REF 615
2. Receive response
REF 615 REF 615
1MRS758407 C
REF 615
SMU615
Technical Manual