U RES
Residual-voltage monitoring relay
A residual-voltage relay responds to the specified residual-voltage measurement.
SLD / Schematic
IEEE / ANSI · U RES
ANSI/IEEE Residual-voltage monitoring relay form
IEEE-library form of residual-voltage monitoring relay: a residual-voltage relay responds to the specified residual-voltage measurement.
In plain English
What does ANSI/IEEE Residual-voltage monitoring relay form mean?
This reference locates residual-voltage monitoring relay in Autodesk's IEEE-oriented voltage protection relays family. A residual-voltage relay responds to the specified residual-voltage measurement. Its drawing needs the voltage-transformer connection and the input quantity definition. The public library uses HCR1F38 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Trace the measured quantity or initiating control signal separately from the output contacts. The device tag links the sensing or operating element to the controlled circuit; settings, reset behaviour and the actual terminal arrangement belong in the selected equipment documentation.
What the drawings help you do
Check the measurement circuit that produces the residual voltage. Residual voltage is different from phase-to-neutral voltage at an arbitrary single phase. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
This particular reference
IEEE-library form of residual-voltage monitoring relay: a residual-voltage relay responds to the specified residual-voltage measurement. Residual voltage is different from phase-to-neutral voltage at an arbitrary single phase.
- Winding
- A coil of conductor inside an electrical machine or transformer.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Coil
- A wound conductor that can produce a magnetic field when energised.
Read the source: Autodesk IEEE Symbol Preview: Voltage Protection Relays
IEEE / ANSI · Residual Voltage Protection
Autodesk IEEE Symbol Preview: Voltage Protection Relays, block HCR1F38. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · U RES
What it represents
This reference locates residual-voltage monitoring relay in Autodesk's IEEE-oriented voltage protection relays family. A residual-voltage relay responds to the specified residual-voltage measurement. Its drawing needs the voltage-transformer connection and the input quantity definition. The public library uses HCR1F38 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Trace the measured quantity or initiating control signal separately from the output contacts. The device tag links the sensing or operating element to the controlled circuit; settings, reset behaviour and the actual terminal arrangement belong in the selected equipment documentation.
Check the measurement circuit that produces the residual voltage. Residual voltage is different from phase-to-neutral voltage at an arbitrary single phase. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
How to read it
- Check the measurement circuit that produces the residual voltage.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Show VT connection
- State residual input scaling
- Reference operating threshold
A distinction that matters
Residual voltage is different from phase-to-neutral voltage at an arbitrary single phase.
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: Voltage Protection Relays
Public IEEE-oriented Voltage Protection Relays table explicitly lists HCR1F38 as Residual Voltage Protection. This supports the vendor convention context, not reproduction of the publisher graphic.
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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