UNE-EN 63024:2019

This International Standard applies to Automatic Reclosing Devices (hereinafter referred to as

ARD ) for household and similar uses, for rated voltage not exceeding 440 V a.c. intended to

be used in combination with circuit-breakers and/or RCCBs and/or RCBOs, and designed either

for factory assembly or for assembly on site.

These devices are intended to reclose main protective devices (hereinafter referred to as

MPD ) such as circuit-breakers complying to IEC 60898-1 and/or IEC 60898-2, RCCBs

complying to IEC 61008-1 and/or IEC 62423, and RCBOs complying to IEC 61009-1 and/or

IEC 62423 after tripping of those devices in order to re-establish continuity of service.

This International Standard includes the following types of ARD:

" ARD with assessment means, reclosing only if both the prospective line current and the

prospective earth-fault current do not exceed given values;

" ARD with assessment means, reclosing only if the prospective line current does not exceed a

given value;

" ARD with assessment means, reclosing only if the prospective earth-fault current does

not exceed a given value;

" ARD that reclose without any assessment.

NOTE 1 Installation rules define the condition of use of each of the products and the types.

NOTE 2 The assessment cannot substitute the verifications required by IEC 60364-6:2016.

NOTE 3 The requirements and tests for the assessment function in IT systems are under consideration.

This International Standard does not apply to ARDs with multiple settings adjustable by

means accessible to the user in normal service.

Devices covered by this standard are intended to be suitable for operation by uninstructed

persons without the need for maintenance.