Cikakken bayani game da DER3B Italiya dossena B-nau'in kwarara kariya Relay:

Italiyanci dossena sabon ci gaba da kayayyakin B-irin kwarara kariya relay, shi ne kawai daidai a kasuwa a halin yanzuIEC 60947-2:2006 annex M ed.4.Daidaitaccen kayayyakin za su iya maye gurbin Bender (Bender) da aka samu a kasuwa a halin yanzu, Socomec (Traceur) da B-nau'in kare kwarara, kuma farashin ya fi amfani.

An iya amfani da nau'in B na kare kwarara a dossena, Italiya, don ƙananan wutar lantarki na DC ko AC ko AC. Musamman dace da frequency converters, UPS， Injin kayan aiki, PV, gine-gine, ɗagawa, ma'adinai, likita da sauran kayan aiki da kuma yawa A-irin leakage kare muhalli da ba za a iya ganowa ba.

DOSSENA' s Earth leakage relay in class B is the only one that complies with the standard IEC 60947-2:2006 annex M ed.4.