GA
Substation RTU
A substation RTU provides the specified monitoring, control and communications interface.
General arrangement objects
Functional block · RCI
Remote-control communications-loss inhibit
Functional block · Substations
An independently authored application reference. The drawing shows the named function or circuit relationship; use the project legend and selected equipment documentation for its drafting form and connections.
Browse this installation focusIn plain English
What this block does
Applies the documented restraint to remote operating requests when their required communication path is lost.
A simple example
In a substation control building, the station controller receives bay information and forwards an operator's selected command to the correct bay device. Device feedback confirms whether the intended result actually occurred. For this reference, the drawing identifies “Link health and authority” at the input and “Remote-operation restraint” at the output. Local protection must retain its defined independence.
What the drawings help you do
Start at the named input: Link health and authority. Identify its source device or document and the state represented on the drawing. Follow the named output: Remote-operation restraint. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- Link health and authority
- Output
- Remote-operation restraint
- Application reference
- An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.
Read the source: SEL-2411 programmable automation controller
Schematic · RCI
What it represents
Applies the documented restraint to remote operating requests when their required communication path is lost. Station automation collects measurements and statuses and issues assigned commands through defined authority paths. A communicated point has a value, quality and equipment identity; it should not be treated as an unexplained contact.
In a substation control building, the station controller receives bay information and forwards an operator's selected command to the correct bay device. Device feedback confirms whether the intended result actually occurred. For this reference, the drawing identifies “Link health and authority” at the input and “Remote-operation restraint” at the output. Local protection must retain its defined independence.
Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation.
How to read it
- Start at the named input: Link health and authority. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Remote-operation restraint. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Local protection must retain its defined independence.
- Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability.
Information to show or reference
- Label the source and connection reference for link health and authority.
- Identify the destination and defined state of remote-operation restraint.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Local protection must retain its defined independence.
A distinction that matters
Local protection must retain its defined independence. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
SEL-2411 programmable automation controller
Public technical context for substation automation and command interfaces. Station I/O, alarms, event recording, command and communications interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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