Lamp
Indicator lamp
A visual indicator associated with a documented control or equipment condition.
Schematic
Protection functions · 30
Annunciator relay
Operates an indication system that presents a detected condition to the operator.
SLD / Schematic · 30
What it represents
Operates an indication system that presents a detected condition to the operator.
In a drafting package, connect this reference to the individual alarm inputs and acknowledgement/reset paths. The associated drawing should trace the annunciator window, horn or common alarm output; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the individual alarm inputs and acknowledgement/reset paths.
- Trace the annunciator window, horn or common alarm output.
Information to show or reference
- Label the individual alarm inputs and acknowledgement/reset paths.
- Cross-reference the annunciator window, horn or common alarm output.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
Annunciation presents a condition; a separate trip relay may act on the same condition.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
ANSI device-number and suffix reference table
Public manufacturer number/name association. Drafting explanations are independently written.
IEEE C37.2-2022: power-system device function numbers
Normative device-number publication; exact edition wording and compliance require the licensed standard.
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. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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