Thermal relay - chigadzirwa uye chirevo chekushanda

Iyo inonzi thermal relay inoshandisa magetsi inodzivirira motokari yemagetsi chero ipi zvayo yemagetsi kubva kune inotyisa inotsika yehutano. Pasi pemutoro mukuru, injini inotungamirira chero mishonga yemagetsi kana magetsi inoshandisa magetsi akawanda. Izvo simba rinogona kudarika nguva yakawanda kudarika chiyero chinotarisirwa chejini. Somugumisiro wehutano hwekusangana, kutonhora mukati memutunhu wedare rinotanga kuwedzera nokukurumidza. Izvi, zvechokwadi, zvinogona kutungamirira kukuputsa kwechigadzirwa ichi chegetsi. Kuchengetedza izvi, magetsi emagetsi anowedzerawo maikirwo anokosha akagadzirirwa kumira kugovera kwegetsi mune chero kupi zvako kwekukurumidzira (nguva dzese mumagetsi emagetsi, kuwandisa, nezvimwewo). Chigadziro chakadaro chakazivikanwa chinonzi thermal relay (dzimwe nguva inogona kuwanikwa mumabhuku acho se "thermal relay"). Basa guru rekutengesa kutsvaga nderokuchengetedza maitiro ekushanda kwechigadzirwa chegetsi uye inyanzvi yekushanda kwayo.

Iyo inonzi thermal relay inowanikwa mukati mayo inokosha bhitetallic plate. Pasi pemusana wekuperesa uye kuwedzera kwemhepo mumagetsi emagetsi, saiti yakadaro inowedzera (yakashata), uye mumamiriro ayo ehurumende ine nzvimbo yakakwana. Iyi bimetallic ndiro yakavhara masangano emagetsi, uye saka ikozvino inogona kuyerera zvakasununguka kuburikidza nemugetsi wedare.

Nekuwedzera uye kuwedzera kwehuwandu hwemagetsi emagetsi munharaunda, kutonhora kunotanga kuwedzera nokukurumidza. Izvi zvinokonzera kupisa kwechimwe chinhu chikuru chekutsvaira kwemafuta - imwe tsanga yesimbi yakasara. Izvozvo zvinotanga kukotama uye kuputsa kuputika kwemagetsi, sezvo inonzi thermal relay yakagadzirirwa kubvisa mutoro uye magetsi apo magetsi emagetsi akazara.

Zvisinei, bimetallic plate inowira zvishoma nezvishoma. Kana hutano hunofambisa uye huchinyatsobatanidza nayo, ipapo kuderera kusina kusimba hakuzovi nechokwadi chekuparara kweArc inobuda apo dunhu rinopera. Nokudaro, mukugadzirwa kwehutambo hwekutsvaira hutachiona hunokurumidza kupiwa hunoti, "zvinonzi" jumping contact ". Kubva pane izvi zvinotevera kuti kusarudzwa kwehutambo hwekutsvaira kunobva pane zvakadai sehutano hwekuteerera kwemazuva ekupindura pahukuru hwemagetsi emagetsi.

Mukuona kwekuputsika uku, mishonga ichavharwa. Mushure mechinguva (kazhinji hafu yenguva-awa), ndiro yakadzika pasi uye inodzokera kune imwe yenyika yapfuura, nokudaro inodzorera magwendefa emudunhu wegetsi. Chigadzirwa chacho chinodzokera kumamiriro ekushanda zvakare.

Iro rinotungisa moto rinogona kunge rine mhando dzakasiyana. Iro reTRP relay (for single phase phase load), TRN (pamatanda maviri-phase), thermal RTT relay (inotora nguva yakawanda inowedzera mumatatu matatu-circuit) uye RTL mitambo relay (kudzivirirwa kwemotokari kubva kunowedzera kunowedzera) inoshandiswa zvakanyanya.