PM
Multifunction power meter
Digital panel meter that measures voltage, current, power, energy and power factor from one set of CT and VT inputs.
SLD / Schematic
Symbols · PQ
Power quality analyser
Instrument that measures and logs harmonics, flicker, dips, swells and unbalance at a point of the network.
In plain English
What does Power quality analyser mean?
A power quality analyser measures disturbances as well as ordinary quantities: harmonics, flicker, voltage dips and swells, unbalance and transients. It is installed at supply points and sensitive loads to show whether supply quality meets the agreed limits, and it keeps event logs for investigation.
A simple example
Measurement methods for power quality are standardised so that different instruments give comparable results, and the class of measurement matters when results are used in disputes. The symbol does not show that class, the VT and CT bandwidth or the logging settings.
What the drawings help you do
Check the measurement class claimed for the analyser. Confirm CT and VT are suitable for harmonic frequencies. A power quality analyser assesses disturbances; a multifunction meter mainly reports fundamental quantities and energy.
This particular reference
Instrument that measures and logs harmonics, flicker, dips, swells and unbalance at a point of the network. A power quality analyser assesses disturbances; a multifunction meter mainly reports fundamental quantities and energy.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: PowerLogic ION9000 user manual · IEC graphical symbols for diagrams
SLD / Schematic · PQ
What it represents
A power quality analyser measures disturbances as well as ordinary quantities: harmonics, flicker, voltage dips and swells, unbalance and transients. It is installed at supply points and sensitive loads to show whether supply quality meets the agreed limits, and it keeps event logs for investigation.
Measurement methods for power quality are standardised so that different instruments give comparable results, and the class of measurement matters when results are used in disputes. The symbol does not show that class, the VT and CT bandwidth or the logging settings.
How to read it
- Check the measurement class claimed for the analyser.
- Confirm CT and VT are suitable for harmonic frequencies.
Information to show or reference
- State measurement class
- Show CT and VT sources
- Reference logging settings
A distinction that matters
A power quality analyser assesses disturbances; a multifunction meter mainly reports fundamental quantities and energy.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
PowerLogic ION9000 user manual
Public meter manual describing measurement, logging and recording features of a revenue and power-quality meter.
IEC graphical symbols for diagrams
IEC context for graphical symbols used in diagrams; no IEC graphic is reproduced.
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.
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