PHASE
Phase-angle meter
A phase-angle meter indicates the phase relationship between documented signals.
SLD / Schematic
IEEE / ANSI · PH
ANSI/IEEE phase-angle meter symbol
IEEE-library form of the phase meter, used where a drawing must show where the angle between two measured quantities is read.
In plain English
What does ANSI/IEEE phase-angle meter mean?
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.
A simple example
The circle and label identify an indicating instrument, not a protection function. It does not tell you the reference convention (leading or lagging positive), the frequency range or whether the meter is analogue or a digital display; those come from the instrument schedule and the vendor data.
What the drawings help you do
Confirm which voltage is the reference and which quantity is compared against it. Check CT and VT polarity dots, because a reversed input shifts the reading by 180 degrees. A phase-angle meter reads an angle; a power-factor meter reads the cosine of that angle and is scaled lead/lag around unity.
This particular reference
IEEE-library form of the phase meter, used where a drawing must show where the angle between two measured quantities is read. A phase-angle meter reads an angle; a power-factor meter reads the cosine of that angle and is scaled lead/lag around unity.
- Winding
- A coil of conductor inside an electrical machine or transformer.
- Phase
- One of the related AC waveforms in a power system.
- Terminal
- An identified point where a conductor connects.
Read the source: Autodesk IEEE Symbol Preview — Instrumentation and Sensors · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
IEEE / ANSI · 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.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · PH
What it represents
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.
The circle and label identify an indicating instrument, not a protection function. It does not tell you the reference convention (leading or lagging positive), the frequency range or whether the meter is analogue or a digital display; those come from the instrument schedule and the vendor data.
How to read it
- Confirm which voltage is the reference and which quantity is compared against it.
- Check CT and VT polarity dots, because a reversed input shifts the reading by 180 degrees.
Information to show or reference
- Identify the reference voltage input
- Show polarity of the compared input
- State the scale or angle convention
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.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Instrumentation and Sensors
Public IEEE-oriented Instrumentation and Sensors preview listing the Phase Meter block and its vendor identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
Explore related references
PF
ANSI/IEEE power-factor meter symbol
IEEE-oriented graphical reference for power-factor meter, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
V
ANSI/IEEE voltmeter symbol
IEEE-oriented graphical reference for voltmeter, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
Put the reference into a drawing workflow.
Elora Grid helps electrical teams work with drawings, specifications and equipment information. Explore the drafting workflow or join the early-access waitlist.