BS IEC 62873-2:2016 pdf download – Residual current operated circuit-breakers for household and similar use Part 2: Residual current devices (RCDs) — Vocabulary 3.1.3 pulsating direct current current of pulsating wave form which assumes, in each period of the rated power frequency,the value 0 during one single interval of time, expressed in angular measure, of at least 180R* Note 1 to entry: The adjective “pulsating” is defined in lEC 60050-103:2009,103-06-07. 3.1.4 current delay anglea time，expressed in angular measure， by which the starting instant of current conduction isdelayed by phase control [SOURCE: IEC 60050-442:1998,442-05-42,modified – ln the definition,”the phase anglerepresenting the time” has been replaced by “time, expressed in angular measure,”.] 3.1.5 smooth direct current direct current which is ripple free Note 1 to entry: A current is considered to be ripple free when the coefficient of ripple is below 10 %.3.2Definitions relating to the energization of an RCD 3.2.1 energizing quantity electrical excitation quantity which，alone or in combination with other such quantities，isapplied to an RCD to enable it to accomplish its function under specified conditions 3.2.2 energizing input-quantity energizing quantity by which the RCD is activated when it is applied under specifiedconditions Note 1 to entry: These conditions involve, for example, the energizing of certain auxiliary elements.3.2.3 residual currentIA r.m.s. value of the vector sum of the instantaneous values of the currents flowing through themain circuit of the RCD [SOURCE: IEC 60050-442:1998,442-05-19，modified – “of the instantaneous values” hasbeen inserted.] 3.2.4 residual operating currentIAn value of residual current which causes the RCD to operate under specified conditions [SOuRCE: lEC 60050-442:1998,442-05-20] 3.2.5 residual non-operating currentIAno value of residual current at which (and below which) the RCD does not operate underspecified conditions [SOURCE: IEC 60050-442:1998,442-05-21] 3.2.6 residual currentIAt <of an RCBO> value of residual current which is the lower limit of the overcurrentinstantaneous tripping range 3.3Definitions relating to the operation and functions of an RCD 3.3.1 switching device device designed to make or break the current in one or more electric circuits [SoURCE: IEC 60050-441:2000,441-14-01] 3.3.2 mechanical switching device switching device designed to close and open one or more electric circuits by means ofseparable contacts [SOURCE IEC 60050-441:2000,441-14-02,modified – Note has been deleted.] 3.3.3 circuit-breaker mechanical switching device,capable of making, carrying and breaking currents under normalcircuit conditions and also making,carrying for a specified duration and breaking currentsunder specified abnormal circuit conditions such as those of short-circuit [SoURCE: IEC 60050-441:2000,441-14-20] 3.3.4 fuse a device...
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