# AC autoreclosing

Canonical URL: https://eloragrid.ai/protection-functions/79-autoreclose
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: 79
Drawing use: SLD, Schematic
Reference families: IEEE / ANSI

A function coordinating a documented automatic reclosing sequence.

## What it represents

An AC autoreclosing function coordinates a reclosing sequence for the associated switching device according to the chosen application and configuration. Its label identifies the function but does not specify shot count, timing, permissives or blocking conditions.
On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure.

## How to read it

- Identify the breaker and the protection functions associated with the sequence.
- Read permissive, blocking and lockout relationships in the selected scheme.

## Information to show or reference

- Reference the controlled breaker.
- Identify the associated protection and controls.
- Link the documented sequence and blocking logic.

## Important distinction

An autoreclose function and an automatic source-transfer function are different control arrangements.

## Facts

- ANSI / IEEE function number: 79
- Equipment implementation: Consult the selected device manual
- Suffix interpretation: Application and manufacturer documentation

## Public references

- [Public reference table of ANSI device-function numbers](https://www.se.com/es/es/faqs/FA34639/) — Schneider Electric. Public manufacturer table used to check the base function-number name.
- [IEEE C37.2-2022: power-system device function numbers](https://ieeexplore.ieee.org/document/9984140) — IEEE. Normative publication reference for the device-function convention.
- [Relion 620: functions, codes and symbols](https://techdoc.relays.protection-control.abb/r/620-series-IEC-60870-5-103-Point-List-Manual/2.0-FP1-IEC/en-US/Functions-codes-and-symbols) — ABB. Public examples of manufacturer-specific function names and suffixes.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.