72
DC circuit breaker
Interrupts or switches a direct-current power circuit using a breaker selected for DC duty.
Protection functions
Protection functions · 82
DC load-measuring reclosing relay
Supervises a DC load condition as part of a documented reclosing arrangement.
SLD / Schematic · 82
What it represents
Supervises a DC load condition as part of a documented reclosing arrangement.
In a drafting package, connect this reference to the DC load measurement and open-circuit supervision. The associated drawing should trace the controlled DC breaker reclose path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design.
How to read it
- Identify the DC load measurement and open-circuit supervision.
- Trace the controlled DC breaker reclose path.
Information to show or reference
- Label the DC load measurement and open-circuit supervision.
- Cross-reference the controlled DC breaker reclose path.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
DC load-measuring reclosing is a specialist scheme and should not be inferred from an AC autoreclose 79 label.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
ANSI device-number and suffix reference table
Public manufacturer number/name association. Drafting explanations are independently written.
IEEE C37.2-2022: power-system device function numbers
Normative device-number publication; exact edition wording and compliance require the licensed standard.
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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