CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
GA objects · PQM
Power quality meter
A measuring device used to monitor electrical quantities and documented power-quality events or waveform characteristics.
GA / SLD / Schematic · PQM
What it represents
A power quality meter measures electrical quantities and provides the power-quality monitoring functions documented for its model. Examples include waveform or disturbance recording and analysis of abnormal supply conditions. An ordinary energy meter should not be assumed to provide these functions.
Coordinate the installed meter or remote display, voltage and current inputs, auxiliary supply and communication interfaces. A complete drawing package links the GA location to the metering schematic and the configuration requirements for the monitoring system.
How to read it
- Read the selected model documentation to identify which measurements, event captures and recording functions are provided.
- Trace voltage/current measurement channels separately from auxiliary power and network or time-reference connections.
Information to show or reference
- Identify the exact meter model, installation form and display arrangement.
- Cross-reference voltage inputs, CT connections, protection/test interfaces and auxiliary supply.
- Show communication, time-reference and data-system interfaces required by the documented application.
A distinction that matters
Power-quality monitoring and energy registration overlap in some meters. A meter label or network connection alone does not prove the event capture, accuracy class or recording capabilities needed for a particular study.
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 advanced energy and power-quality meter manual provides installation and operating context.
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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