CB UV
Circuit breaker with undervoltage release
A breaker undervoltage release changes the breaker operating condition when its control voltage falls below the specified range.
SLD / Schematic
IEEE / ANSI · CB UV
ANSI/IEEE circuit breaker with undervoltage release symbol
IEEE-oriented graphical reference for circuit breaker with undervoltage release, with public vendor evidence and drawing-reading notes.
IEEE / ANSI · Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form
Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · CB UV
What it represents
This combined breaker form marks a current protective device with a documented loss-of-voltage operating function. The control-voltage path must be established from the actual equipment diagram because it can differ from the feeder voltage being interrupted.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.
How to read it
- Follow the release supply independently of the main feeder.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.
Information to show or reference
- State release input
- Show control terminals
- Reference voltage-loss behaviour
A distinction that matters
A breaker release and a voltage-measuring relay are different devices even when both contribute to the same trip sequence.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers
Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
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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