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 tachometric dynamo symbol

A tachometric dynamo is a small generator coupled to the machine shaft whose output voltage rises with speed. It appears in older drive, governor and speed-indication schematics, with its output wired to a tachometer, speed relay or drive feedback input.

Drawing use: Schematic
Application: Metering & protection
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Autodesk IEEE-oriented Instrumentation and Sensors form: Tachometric Dynamo. Autodesk publishes this block under its IEEE Symbol Preview. The counterpart is the matching functional concept in the library; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

A tachometric dynamo generates a speed signal; a pulse (impulse) pickup produces pulses that must be counted.

Full reference

HIN1B11

IEC

Tachometric dynamo

A tachometric dynamo indication identifies a speed-related generating measurement function.

Drawing use: Schematic
Application: Metering & protection
Reference family: IEC / Manufacturer
Form evidence: Tachometric dynamo. Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

A speed-measurement generator differs from a power-generating machine.

Full reference

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