CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
Symbols · I LOW
Minimum-current monitoring relay
A minimum-current relay operates according to a configured low-current condition.
SLD / Schematic · I LOW
What it represents
A minimum-current relay operates according to a configured low-current condition. Control drawings must identify whether it supervises an operating load, a permissive or another circuit.
How to read it
- Check how the relay handles zero current during intentional shutdown.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Name supervised circuit
- Reference enable condition
- State threshold and delay
A distinction that matters
Low current can be an intentional stopped state; the control logic defines when it is abnormal.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Current monitoring relays
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
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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