Differential relay: chinangwa uye chiyero
Difrele uye difautomats midziyo yakafanana zvakanyanya. Izvo zvakasiyana mukugadzira uye nheyo yekushanda. Ngationgororei zvakadzama maitiro avo uye kusiyana kwavo.
Basic maitiro
A difrel mudziyo unodzivirira vatengi kubva kumagetsi kuvhundutswa nekusangana kwakananga nenzvimbo inofambisa. Semuenzaniso, tambo isina kuvharwa, mudziyo wemagetsi, muviri waro unopihwa simba.
differential relay - Zvishandiso zvinodikanwa kudzivirira kubva pamoto pamidziyo ine yakakanganisika insulation uye isina kunaka magetsi wiring. Aya maRCD anovhura dunhu kana aitika mune wiring kana kusaenzana kwazvino kuchiitika.
Iyo indasitiri inoburitsa marudzi maviri akasiyana:
- AC mhando. Kudzokororwa kwakadaro kwakagadzirirwa kupindura kune kuvuza kwe sinusoidal alternating currents.
- Type A. Yakagadzirirwa kuiswa mumaseketi ayo anodyisa midziyo ine rectifiers kana thyristors mukuumbwa kwayo. Ndiko, apo, kana pakaitika kuparara kwekudzivirira, kuvuza kwezvose zviri zviviri zvakananga uye zvinochinjika zvino zvinoitika. Mirayiridzo yekuisa relays yakadaro inowanikwa mumirairo yekushanda yezvimwe midziyo yemumba.
Ko difrele yakasiyana sei nedifavtomat?
Difrele kana RCD ine differential automaton ine zvimwe zvakafanana, kunyanya zvekunze, asi musimboti wekushanda kwemidziyo iyi yakasiyana zvakanyanya. Iyo yekusiyanisa relay inosanganisira yekukurumidza vector kuongororwa kweiyo iripo muchikamu - 0.
Kana iyo yakawanda yevectors isiri zero, iyo nzira inogamuchira chiratidzo chekuvhura dunhu, ndiko kuti, inopindirana nemagetsi emagetsi. Iyo difavtomat inopindura kune iyo inonzi overcurrents inoitika panguva yekuremerwa uye pfupi dunhu, kunyangwe zvimwe zvezvishandiso izvi zvinopindurawo kune yazvino kuvuza muvhu, ichiita mabasa eautomaton uye relay panguva imwe chete.
Sezvo difrele uye difautomat zvakada kufanana, zvakanyanya kuomera munhu anodzidzira magetsi kuti azvitsaure - unofanirwa kuziva mamaki. Hongu, uye kuiswa kwezvishandiso zvinogona kudzivirira pamoto uye, semugumisiro, kuve nechokwadi chekuchengetedzwa kwehupenyu uye hutano, zviri nani kuvimba nemhizha dzakakodzera.
Aya mayuniti akaiswa mushure mekutanga mita mumagetsi emagetsi pane yakatarwa DIN njanji. Pamhepo ye 220 V, vane materminals maviri painopinza uye maviri pakubuda. Mumaindasitiri emaindasitiri uye munzvimbo dzinopihwa voltage ye380 V, materminal mana anoiswa pane inopinza uye inobuda. Aya ma nuances anofanirwa kuverengerwa nekushanda kwakakodzera kwemidziyo.