Understand the difference.

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

G

Symbols

Galvanometer

A galvanometer is a very sensitive current indicator, often with a centre zero, used to detect small currents rather than measure them to a scale. It is drawn in bridge and comparison circuits, where the operator adjusts a component until the galvanometer reads zero.

Drawing use

Schematic

Application

Metering & protection

Reference family

IEC / IEEE / ANSI

A distinction that matters

A galvanometer detects small or zero current; an ammeter measures current to a calibrated scale.

Full referenceAdd to legend

A

Symbols

Ammeter

An ammeter indicates current from a direct or instrument-transformed measurement circuit. Its schematic must identify the actual current path and any CT secondary circuit.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEC / Manufacturer

A distinction that matters

An ammeter is an indication device, not an overcurrent protective function.

Full referenceAdd to legend

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