Standards Development

Scope

The scope of IEC 61008–1 and IEC 61009–1 applies with the following additions.

This standard specifies requirements and tests for Type F and Type B RCDs (Residual Current Devices). Requirements and tests given in this standard are in addition to the requirements of Type A residual current devices. This standard can only be used together with IEC 61008-2-1 or IEC 61008-2-2 or IEC 61009-2-1 or IEC 61009-2-2 as relevant.

Type F RCCBs (Residual Current Circuit Breaker) and Type F RCBOs (Residual current Circuit Breaker with Overcurrent protection) with rated frequency 50 Hz or 60 Hz are intended for installations when frequency inverters are supplied between phase and neutral or phase and earthed middle conductor and are able to provide protection in case of residual sinusoidal alternating currents at the rated frequency, residual pulsating direct currents and composite residual currents that may occur.

Type B RCCBs and Type B RCBOs are able to provide protection in case of residual sinusoidal alternating currents up to 1 000 Hz, residual pulsating direct currents and residual smooth direct currents.

RCDs according to this standard are not intended to be used in d.c. supply systems.

For the purpose of verification of conformity, test sequences and number of samples are provided in Annex A, Annex B, Annex C and Annex D of this standard.

The complete test sequence for type test of Type F RCCBs and Type F RCBOs is given in Table A.1 and Table B.1 respectively.

The complete test sequence for type test of Type B RCCBs and Type B RCBOs is given in Table C.1 and Table D.1 respectively.

NOTE 1 Throughout the document, the term RCD refers to RCCBs and RCBOs.

NOTE 2 Type F and type B RCDs have high resistance against unwanted tripping, even if the surge voltage causes a flashover and a follow-on current occurs, and in case of inrush residual currents with a maximum duration of 10 ms which can occur in case of switching ON electronic equipment or EMC-filters.