Insulation resistance tester inokodzera kuyera kukosha kwekupokana kwezvinhu zvakasiyana-siyana zvekudzivirira uye kudzivirira kwekudzivirira kweshanduko, mota, tambo nemidziyo yemagetsi kuti ive nechokwadi chekuti midziyo iyi, midziyo yemagetsi uye mitsara inoshanda munzvimbo yakajairwa uye kudzivirira tsaona dzakaita sekuvhunduka kwemagetsi. vakakuvara uye kukuvara kwemidziyo.
Matambudziko akajairwa einsulation resistance tester ndeaya anotevera:
1. Pakuyera capacitive mutoro kuramba, ndeupi hukama pakati pekubuda kwenguva pfupi-yedunhu ikozvino ye insulation resistance tester uye data yakayerwa, uye nei?
Iyo yakabuda pfupi-yedunhu ikozvino yeiyo insulation resistance tester inogona kuratidza kupikisa kwemukati kweiyo yakakwira-voltage sosi.
Zvinhu zvakawanda zvekuisa bvunzo zvinhu zvine capacitive mitoro, senge tambo refu, mota dzine mamwe ma windings, transformers, etc. Naizvozvo, kana chinhu chakayerwa chine capacitance, pakutanga kwebvunzo maitiro, iyo yakakwira voltage sosi mune insulation resistance tester inofanira kuchaja. iyo capacitor kuburikidza nekupikiswa kwayo kwemukati, uye zvishoma nezvishoma inochaja iyo voltage kune yakabuda yakatarwa yakakwira voltage kukosha kweiyo insulation resistance tester.Kana iyo capacitance kukosha kwechinhu chakayerwa yakakura, kana kupikisa kwemukati kweiyo voltage sosi yakakura, iyo yekuchaja inotora nguva yakareba.
Kureba kwayo kunogona kutsanangurwa nechigadzirwa cheR uye C mutoro (mumasekondi), kureva t = R * C mutoro.
Nokudaro, panguva yekuedzwa, capacitive load inoda kubhadharwa kune test voltage, uye kukurumidza kutengesa DV / DT yakaenzana nechiyero chekuchaja ikozvino I uye mutoro capacitance C. Ndiyo DV / dt = I / C.
Naizvozvo, iyo diki yekupikisa kwemukati ndeye, yakakura yekuchaja ikozvino, uye inokurumidza uye yakagadzikana mhedzisiro yebvunzo ndeye.
2. Chii chinonzi "g" kuguma kwechiridzwa?Munzvimbo yekuyedza yemagetsi akakwira uye nekupikisa kwakanyanya, nei chiridzwa chakabatana kune "g" terminal?
Iyo "g" yekupedzisira yechiridzwa ndeye shielding terminal, iyo inoshandiswa kubvisa pesvedzero yekunyorova uye tsvina munzvimbo yekuedzwa pamhedzisiro yekuyera.Iyo "g" yekupedzisira yechiridzwa ndeyekunzvenga iyo inovuza ikozvino pamusoro pechinhu chakayedzwa, kuitira kuti iyo inoyerera irege kupfuura nepakati bvunzo rechiridzwa, kubvisa chikanganiso chinokonzerwa nekudonha ikozvino.Paunenge uchiyedza kukosha kwekupikisa, iyo G yekupedzisira inoda kushandiswa.
Kazhinji kutaura, g-terminal inogona kutariswa kana yakakwira kupfuura 10g.Zvisinei, rudzi urwu rwekupikisa haruna kukwana.Iyo yakachena uye yakaoma, uye chiyero chechinhu chinofanira kuyerwa idiki, saka chinogona kugadzikana pasina kuyera 500g pane g-yekupedzisira;Munzvimbo yakanyorova uye yakasviba, kushomeka kwepasi kunodawo g terminal.Kunyanya, kana zvikaonekwa kuti mhedzisiro yakaoma kugadzikana kana kuyera kupikisa kwakanyanya, g-terminal inogona kutariswa.Uye zvakare, zvinofanirwa kucherechedzwa kuti shielding terminal G haina kubatanidzwa kune inodzivirira layer, asi yakabatana kune insulator pakati peL neE, kana mune yakawanda strand waya, kwete kune dzimwe waya dziri kuedzwa.
3. Sei zvakakosha kuyera kwete chete kupikisa kwakachena, asiwo chiyero chekutora uye polarization index paunenge uchiyera kuvhara?
PI ndiyo indekisi yepolarization, iyo inoreva kuenzanisa kwekupokana kwekudzivirira mumaminitsi gumi uye 1 miniti panguva yekuyedzwa kwekudzivirira;
DAR ndiyo dielectric absorption ratio, iyo inoreva kuenzanisa pakati pekudzivirira kwekudzivirira muminiti imwe uye iyo mu15s;
Muyedzo yekudzivirira, kukosha kwekudzivirira kwekudzivirira pane imwe nguva haigone kuratidza zvizere kunaka kwekuita kwekudzivirira kwechinhu chekuyedza.Izvi zvinokonzerwa nezvikonzero zviviri zvinotevera: kune rumwe rutivi, kupikisa kwekudzivirira kwemaitiro akafanana ekudzivirira zvinhu zviduku kana vhoriyamu yakakura, uye yakakura kana ivhu diki.Kune rimwe divi, kune kubhadharisa absorptivity uye polarization maitiro mune insulating zvinhu kana yakakwira voltage yaiswa.Naizvozvo, iyo simba sisitimu inoda kuti iyo absorption ratio (r60s kusvika r15s) uye polarization index (r10min kusvika r1min) inofanirwa kuyerwa muyedzo yekudzivirira ye main transformer, tambo, mota uye zvimwe zviitiko zvakawanda, uye mamiriro ekudzivirira anogona kuyerwa ne. iyi data.
4. Sei mabhatiri akati wandei eelectronic insulation resistance tester achigona kuburitsa high DC voltage?Izvi zvinobva pamusimboti wekutendeuka kweDC.Mushure mekusimudzira wedunhu kugadzirisa, iyo yakaderera yemagetsi voltage inosimudzwa kune yakakwirira kubuda DC voltage.Kunyangwe iyo inogadzirwa yakakwira voltage yakakwira, iyo inobuda simba idiki (yakaderera simba uye diki ikozvino).
Cherechedza: kunyange kana simba racho riri duku zvikuru, hazvikurudzirwi kubata test probe, pachange paine tingling.
Nguva yekutumira: Chivabvu-07-2021
