f MON
Frequency monitoring relay
A frequency relay issues a documented output for a configured frequency condition.
SLD / Schematic
IEEE / ANSI · f MON
ANSI/IEEE Frequency monitoring relay form
IEEE-library form of frequency monitoring relay: a frequency relay issues a documented output for a configured frequency condition.
In plain English
What does ANSI/IEEE Frequency monitoring relay form mean?
This reference locates frequency monitoring relay in Autodesk's IEEE-oriented miscellaneous relays family. A frequency relay issues a documented output for a configured frequency condition. The schematic identifies its measurement input and links its thresholds to the settings record. The public library uses HCR1F40 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
Determine whether high frequency, low frequency or both are monitored. A frequency relay applies operating criteria; a frequency meter only indicates the measured value. 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 frequency monitoring relay: a frequency relay issues a documented output for a configured frequency condition. A frequency relay applies operating criteria; a frequency meter only indicates the measured value.
- 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.
- Terminal
- An identified point where a conductor connects.
Read the source: Autodesk IEEE Symbol Preview: Miscellaneous Relays
IEEE / ANSI · Frequency Relay
Autodesk IEEE Symbol Preview: Miscellaneous Relays, block HCR1F40. 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 · f MON
What it represents
This reference locates frequency monitoring relay in Autodesk's IEEE-oriented miscellaneous relays family. A frequency relay issues a documented output for a configured frequency condition. The schematic identifies its measurement input and links its thresholds to the settings record. The public library uses HCR1F40 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.
Determine whether high frequency, low frequency or both are monitored. A frequency relay applies operating criteria; a frequency meter only indicates the measured value. 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
- Determine whether high frequency, low frequency or both are monitored.
- 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
- Name measured bus
- Reference thresholds and delay
- Show output contacts
A distinction that matters
A frequency relay applies operating criteria; a frequency meter only indicates the measured value.
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: Miscellaneous Relays
Public IEEE-oriented Miscellaneous Relays table explicitly lists HCR1F40 as Frequency Relay. 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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