GA
Panel service outlet
A panel service outlet provides the specified auxiliary socket interface.
General arrangement objects
Functional block · AASI
Auxiliary AC source-transfer interface
Functional block · Switchrooms
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
Transfers the assigned room AC bus between documented available sources.
A simple example
In a switchroom, the lighting, service sockets, charger input and room cooling may be fed from different auxiliary branches. A source change must preserve the identities of loads that require continuity. For this reference, the drawing identifies “Auxiliary-source health” at the input and “Selected AC bus source” at the output. Source interlocking must prevent unintended paralleling.
What the drawings help you do
Start at the named input: Auxiliary-source health. Identify its source device or document and the state represented on the drawing. Follow the named output: Selected AC bus source. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- Auxiliary-source health
- Output
- Selected AC bus source
- 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-RPM redundant power module
Schematic · AASI
What it represents
Transfers the assigned room AC bus between documented available sources. An auxiliary AC distribution diagram identifies the supplies serving room services and control-support equipment. Essential, backed-up and ordinary circuits can have different source paths and operating priorities.
In a switchroom, the lighting, service sockets, charger input and room cooling may be fed from different auxiliary branches. A source change must preserve the identities of loads that require continuity. For this reference, the drawing identifies “Auxiliary-source health” at the input and “Selected AC bus source” at the output. Source interlocking must prevent unintended paralleling.
Label source, branch protection and load purpose. The arrangement does not establish conductor sizes, protection settings or installation compliance; it links the operating role to the selected equipment schedule. 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: Auxiliary-source health. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Selected AC bus source. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Source interlocking must prevent unintended paralleling.
- Label source, branch protection and load purpose. The arrangement does not establish conductor sizes, protection settings or installation compliance; it links the operating role to the selected equipment schedule.
Information to show or reference
- Label the source and connection reference for auxiliary-source health.
- Identify the destination and defined state of selected ac bus source.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Source interlocking must prevent unintended paralleling.
A distinction that matters
Source interlocking must prevent unintended paralleling. 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-RPM redundant power module
Public technical context for switchroom auxiliary ac distribution. Independent AC and DC sources for station auxiliary power. 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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