Understand the difference.

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

PH

IEEE / ANSI

ANSI/IEEE phase-angle meter symbol

In IEEE-oriented panel schematics the phase meter appears as a circular instrument fed from both a voltage reference and a current or second voltage input. The reading is the angle between those two inputs, so the symbol only makes sense when both connections are traced back to their instrument transformers and their polarity marks.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Autodesk IEEE-oriented Instrumentation and Sensors form: Phase Meter. 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 phase-angle meter reads an angle; a power-factor meter reads the cosine of that angle and is scaled lead/lag around unity.

Full referenceAdd to legend

PHASE

Symbols

Phase-angle meter

A phase-angle meter indicates the phase relationship between documented signals. The schematic names the reference and compared input so the displayed angle is interpretable.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEC / Manufacturer

A distinction that matters

A phase-angle meter is not automatically a synchronism-check permissive relay.

Full referenceAdd to legend

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