Ground leakage (Ground leakage) (Ground leakage) imhepo inosvika pasi nenzira isingatarisirwe. Kune mapoka maviri: kudonha kwepasi kusingatarisire kunokonzerwa nekuvharisa kana kutadza kwemidziyo uye kudonha kwevhu nemaune kunokonzerwa nemagadzirirwo emidziyo. "Design" kuvuza kunogona kuita kunge kusinganzwisisike, asi dzimwe nguva hazvidzivisike-semuenzaniso, michina yeIT inowanzo gadzira imwe kuvuza kunyangwe ichishanda nemazvo.
Pasinei nekwakabva kudonha, inofanira kudzivirirwa kubva pakukonzera kuvhunduka kwemagetsi. Izvi zvinowanzoitwa nekushandisa RCD (leakage protection device) kana RCBO (leakage circuit breaker ine overcurrent protection). Ivo vanoyera ikozvino mumutsara conductor uye vanoienzanisa neyazvino mune isina kwayakarerekera conductor. Kana mutsauko wakapfuura iyo mA rating yeRCD kana RCBO, ichafamba.
Muzviitiko zvakawanda, kuvuza kunoshanda sezvinotarisirwa, asi dzimwe nguva RCD kana RCBO inoenderera mberi nerwendo pasina chikonzero-iyi "rwendo runogumbura". Nzira yakanakisa yekugadzirisa dambudziko iri kushandisa meter yekuvharisa, seMegger DCM305E. Izvi zvakasungirirwa kutenderedza waya uye isina kwayakarerekera conductor (asi kwete inodzivirira conductor!), uye inoyera pasi kuvuza ikozvino.
Kuti uone kuti nderipi dunhu rakonzera rwendo rwenhema, dzima maMCB ese muchikamu chinodya magetsi uye woisa chinosungirira chinodonhedza pasi chakatenderedza tambo yemagetsi. Batidza dunhu rega rega. Kana ikakonzera kuwedzera kukuru kwekudonha, iyi inogona kunge iri dambudziko redunhu. Danho rinotevera nderekuona kuti kubvinza kwaive nemaune here. Kana zvakadaro, imwe nzira yekuparadzira mutoro kana kupatsanurwa kwedunhu inodiwa. Kana kuri kudonhedza kweune—mugumisiro wokukundikana—kukundikana kunofanira kuwanwa ndokugadziridzwa.
Usakanganwa kuti dambudziko rinogona kunge riri rakashata RCD kana RCBO. Kuti utarise, ita RCD ramp bvunzo. Kana iri 30 mA mudziyo-inonyanya kuzivikanwa chiyero-inofanirwa kutsika pakati pe24 ne28 mA. Kana ikafamba nemhepo yakaderera, ingada kuchinjwa.