Isolator
Disconnector
A switching device providing an electrical isolation function.
SLD / Schematic
Protection functions · 75
Position-changing mechanism
Moves an apparatus between defined physical positions.
SLD / Schematic · 75
What it represents
Moves an apparatus between defined physical positions.
In a drafting package, connect this reference to the mechanism drive and selected target positions. The associated drawing should trace the actuator command, travel limits and status circuits; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the mechanism drive and selected target positions.
- Trace the actuator command, travel limits and status circuits.
Information to show or reference
- Label the mechanism drive and selected target positions.
- Cross-reference the actuator command, travel limits and status circuits.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
Device 75 moves equipment; device 33 observes a position and device 84 describes an operating mechanism.
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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