Understand the difference.
Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.
82
Protection functionsDC load-measuring reclosing relay
Supervises a DC load condition as part of a documented reclosing arrangement.
- Drawing use
- SLD / Schematic
- Application
- Metering & protection
- Reference family
- IEEE / ANSI
A distinction that matters
DC load-measuring reclosing is a specialist scheme and should not be inferred from an AC autoreclose 79 label.
72
Protection functionsDC circuit breaker
Interrupts or switches a direct-current power circuit using a breaker selected for DC duty.
- Drawing use
- SLD / Schematic
- Application
- Metering & protection
- Reference family
- IEEE / ANSI
A distinction that matters
Device 72 identifies a DC breaker; AC breaker 52 cannot be substituted without checking the equipment's DC ratings and duty.
Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.