Requirements for automatic reclosing devices (ARDs) for circuit-breakers, RCBOs and RCCBs for household and similar uses

2Scope / Description

This International Standard applies to automatic reclosing devices (ARDs) for household and similar uses, for rated voltage not exceeding 440 V AC, and which are intended to be used in combination with circuit-breakers, RCCBs and RCBOs, and designed either for factory assembly or for assembly on site. These devices are intended to reclose main protective devices (MPDs) such as circuit-breakers complying with IEC 60898-1 and/or IEC 60898-2, RCCBs complying with IEC 61008-1 and/or IEC 62423, and RCBOs complying with IEC 61009-1 and/or IEC 62423 after tripping of those devices in order to re-establish continuity of service. This document includes the following types of ARDs: ARDs with assessment means, reclosing only if both the prospective line current and the prospective earth-fault current do not exceed given values; ARDs with assessment means, reclosing only if the prospective line current does not exceed a given value; ARDs with assessment means, reclosing only if the prospective earth-fault current does not exceed a given value; ARDs that recloses 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. NOTE 3 The requirements and tests for the assessment function in IT systems are under consideration. This document does not apply to ARDs with multiple settings adjustable by means accessible to the user in normal service. Devices covered by this document are intended to be suitable for operation by uninstructed persons without the need for maintenance.