IEC 63552 ED1

Switching device for islanding (SDFI)

General information

Current stage: 50.00 Effective date: Nov 19, 2025

Next stage: CFDIS Next stage date: Feb 11, 2026

Originator: IEC

Owner: TC 23/SC 23K

Type: International Standard

ICS: 27.015 29.020

Scope

IEC 63552:2026 applies to switching device for islanding, hereafter referred to as SDFI, for household and similar uses, primarily intended to be used for energy efficiency (EE) purposes with local production or local storage of energy, or with both.
SDFI are intended to be installed in low voltage prosumer electrical installations (PEI) able to operate in island mode as defined in IEC 60364-8-82, so called islandable PEI.
SDFI are used to disconnect the PEI from the grid to allow operating the PEI in island mode and further reconnect the PEI to the grid.

Life cycle

NOW

IN_DEVELOPMENT
IEC 63552 ED1
50.00 Final text received or FDIS registered for formal approval
Nov 19, 2025