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

HIN1P25

IEC

Pyrometer indication

A pyrometer indication identifies the documented temperature-measurement display function.

Drawing use: Schematic
Application: Metering & protection
Reference family: IEC / Manufacturer
Form evidence: Pyrometer indication. 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 temperature display symbol does not determine whether the measurement uses contact or non-contact sensing.

Full reference

Symbols

Current transformer

A current transformer produces a secondary current related to the current in its primary conductor. A drawing uses the CT representation to show where current is measured and which metering or protection circuit receives that measurement. It does not, by itself, specify the CT ratio, accuracy class, burden or secondary connection.

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

A distinction that matters

A CT measures current. A VT measures voltage. Their secondary circuits and isolation/testing arrangements are different.

Full reference

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