Zosinthira ma Knob ndi zosinthira ma circuit (nthawi zina zimatchedwanso rotary toggle switches ndi push-button toggle switch) ndi mitundu iwiri yodziwika bwino pamakina amagetsi, iliyonse ili ndi mawonekedwe apadera komanso zochitika zomwe zimagwira ntchito.
Owombera ma Knob amagwiritsa ntchito kondomu yozungulira kuti azitha kuyatsa ndi kuyimitsa dera. Kusintha kwamtunduwu nthawi zambiri kumagwiritsidwa ntchito pazochitika zomwe zikuyenera kuyendetsedwa bwino, monga malo ogawa magetsi ndi ma laboratories. Ubwino wa knob circuit breaker ndikuti ili ndi kulondola kwakukulu kosintha. Ogwiritsa ntchito amatha kusintha molondola pakali pano pozungulira chopukutira kuti atsimikizire kuti zidazo zimagwira ntchito bwino komanso kulondola kwa zotsatira zoyesera. Kuphatikiza apo, chowotcha chigawo cha knob chimangoyenda pomwe dera likulephera kapena litalemedwa, kudula magetsi kuti ateteze chitetezo cha zida ndi ogwira ntchito. Ndi yosavuta kugwiritsa ntchito, sikutanthauza akatswiri amisiri kuti agwire ntchito, ndipo ili ndi mtengo wotsika. Makamaka pazida zing'onozing'ono zamagetsi, kugwiritsa ntchito kobowola kozungulira kumatha kuchepetsa mtengo. Komabe, pakachitika ngozi, liwiro la ntchito ya knob circuit breaker silingakhale lachangu ngati chodulira batani.
Chowotcha chozungulira (mtundu wa batani-kankhira) chimasintha mawonekedwe a dera podina batani. Kusintha kwamtunduwu nthawi zambiri kumagwiritsidwa ntchito kuwongolera mafunde ang'onoang'ono ndi ma voltages, monga masiwichi ndi nyali zowonetsera zida zamagetsi. Ubwino wa makina ozungulira mabataniwo ndi osavuta kugwiritsa ntchito ndikuyankha mwachangu, kuwapangitsa kukhala oyenera kwambiri pazochitika zomwe mphamvu ziyenera kudulidwa mwachangu, monga mabatani oyimitsa mwadzidzidzi pamizere yopanga ndi machitidwe olumikizira ma alarm amoto m'malo opezeka anthu ambiri. M'mikhalidwe iyi, nthawi ndi moyo, ndipo zodutsa mabatani amatha kudula mphamvu mwachangu ndikuchepetsa zoopsa zomwe zingachitike. Kuphatikiza apo, ophwanya mabatani amakankhira nthawi zambiri amakhala ndi zizindikiritso zomveka bwino, monga zofiira kuti atuluke komanso zobiriwira kuti zilumikizidwe, zomwe zimapangitsa kuti zikhale zosavuta kwa ogwiritsa ntchito kuzindikira momwe alili pano.
Ponena za mtundu wanji wa ophwanya dera ndi wabwinoko, zimatengera momwe amagwiritsira ntchito komanso zosowa zake. Ma Cnob-Circle breakers amachita bwino m'magawo omwe kuwongolera kulondola kwa kukula kwapano ndi kulondola kwakusintha kumafunika, pomwe zowombera mabatani zimakhala zopindulitsa pazochitika zomwe mphamvu ziyenera kudulidwa mwachangu komanso ntchito zadzidzidzi zimafunika. Chifukwa chake, posankha chophwanyira dera, ogwiritsa ntchito ayenera kuganizira mozama kutengera zosowa zenizeni komanso malo omwe akugwiritsidwa ntchito.
Nthawi zambiri, ophwanya ma circuit-knob ndi ma toggle-type circuit breakers ali ndi maubwino akeake komanso momwe amachitira. Popanga ndi kusankha njira yamagetsi, mtundu woyenera kwambiri wamagetsi ozungulira uyenera kusankhidwa molingana ndi momwe zinthu zilili kuti zitsimikizire kuti kayendetsedwe ka magetsi kamakhala kotetezeka komanso kokhazikika. Panthawi imodzimodziyo, ziribe kanthu kuti ndi mtundu wanji wamtundu wamtundu wosankhidwa, ubwino wake ndi ntchito zake ziyenera kutsimikiziridwa kuti zigwirizane ndi zofunikira ndi zofunikira.
