Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

IEEE / ANSI

ANSI/IEEE frequency meter symbol

The frequency-meter form identifies the frequency of a specified measurement source. When several buses or generators appear on the drawing, the input path and selection switch determine which source is being indicated.

Drawing use: SLD / Schematic
Application: Metering & protection
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Autodesk IEEE-oriented Instrumentation and Sensors 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.

A distinction that matters

Frequency indication differs from an underfrequency relay's trip or load-shed criterion.

Full reference

Symbols

Frequency meter

A frequency meter indicates the frequency of its measured input. The source of that input must be clear when multiple buses or generators are present.

Drawing use: SLD / Schematic
Application: Metering & protection
Reference family: IEC / Manufacturer

A distinction that matters

A frequency meter displays a quantity; an underfrequency relay applies an operating threshold.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.