CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
IEC · HTC1LTB
Thermocouple with terminal board
This representation distinguishes a thermocouple circuit expanded to show its terminal-board interface.
IEC · Thermocouple with terminal board
Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · HTC1LTB
What it represents
This representation distinguishes a thermocouple circuit expanded to show its terminal-board interface.
Coordinate thermocouple polarity, terminal identity and the specified extension/compensating conductors.
Adding a terminal board does not make a thermocouple circuit an ordinary copper voltage circuit.
How to read it
- Coordinate thermocouple polarity, terminal identity and the specified extension/compensating conductors.
- Adding a terminal board does not make a thermocouple circuit an ordinary copper voltage circuit.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- Coordinate thermocouple polarity, terminal identity and the specified extension/compensating conductors.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
Adding a terminal board does not make a thermocouple circuit an ordinary copper voltage circuit.
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: Instrumentation and sensors
Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.
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
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.