Ko te RCD he kupu whānui e whakamahia ana i roto i ngā ture me ngā waehere mahi, tae atu ki te RCCB, te RCBO, me te CBR. Arā, ko ngā taputapu e whakarato ana i te "tiaki" i te au toenga, arā, ina nui ake te au toenga i tētahi paepae kua tautuhia, ina whakawetohia ā-ringa rānei te taputapu, ka kitea e rātou te au toenga, ā, ka "wehewehe" i te ara iahiko mā te hiko. He rerekē ki te RCM (Residual Current Monitor) e whakamahia ana hei "kite" i te au toenga engari kāore e whakarato i te tiaki i te au toenga - tirohia ngā tuhipoka ki te Tuhinga 411.1 me ngā paerewa hua kua whakarārangihia i te mutunga o te Tuhinga 722.531.3.101
Mā te RCCB, RCBO, me te CBR ka tiakina mā te wehe i te pūtake hiko hei ārai i ngā hapa o te iahiko toenga e mate ai te taputapu, e whakaweto rānei ā-ringa.
Me whakamahi tahi te RCCB (EN6008-1) me tētahi OLPD motuhake, arā, me whakamahi he fiusi me/ranei he MCB hei tiaki i a ia mai i te iahiko nui rawa.
He pumau ngā āhuatanga o te RCCB me te RCBO, ā, kua hangaia kia tautuhia anō e te tangata noa mēnā he hapa.
CBR (EN60947-2) Wawahi ara iahiko me te mahi tiaki iahiko toenga kua hangaia ki roto, e tika ana mō ngā tono iahiko teitei ake >100A.
Tērā pea he āhuatanga whakarerekē o te CBR, ā, e kore e taea e te tangata noa te tautuhi anō mēnā he hapa.
E pā ana hoki te Tuhinga 722.531.3.101 ki te EN62423; e pā ana ngā whakaritenga hoahoa tāpiri ki te RCCB, RCBO me te CBR mō te kimi i te iahiko toenga F, B rānei.
Ko te RDC-DD (IEC62955) he tohu mō te taputapu kimi iahiko DC toenga*; he kupu whānui mō tētahi raupapa taputapu i hangaia hei kimi i te iahiko hapa DC maeneene i roto i ngā tono utu i te Aratau 3, ā, e tautoko ana i te whakamahinga o ngā RCD Momo A, Momo F rānei i roto i te ara iahiko.
E rua ngā whakatakotoranga matua e tohua ana e te paerewa RDC-DD IEC 62955, arā, ko te RDC-MD me te RDC-PD. Mā te mārama ki ngā whakatakotoranga rerekē ka kore koe e hoko i ngā hua kāore e taea te whakamahi.
Ka whakauruhia e te RDC-PD (pūrere tiaki) te kimi hiko DC maeneene 6 mA me te tiaki iahiko toenga 30 mA A, F rānei ki roto i te pūrere kotahi. Ka wehea te hononga RDC-PD mā te hiko mēnā he hapa iahiko toenga.