Understand the difference.

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

A

Symbols

Recording ammeter

A recording ammeter logs current against time and is used to study load profiles, motor starting and feeder loading. It is connected in a CT secondary circuit, so like any CT-fed instrument its input forms part of a loop that must never be opened under load.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEC

A distinction that matters

A recording ammeter logs current over time; a maximum-demand indicator keeps only the highest averaged value.

Full referenceAdd to legend

*

Symbols

Recording instrument general symbol

A recording instrument keeps a record of a measured quantity over time, traditionally on a paper chart and now usually in memory. IEC-style diagrams draw it as a square, with the placeholder replaced by the recorded quantity, so it can be told apart from a simple indicating meter at a glance.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEC

A distinction that matters

A recording instrument stores values against time; an indicating instrument shows only the present value.

Full referenceAdd to legend

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