Iyo musimboti wekuyera dc kuvuza ikozvino kweye insulator yakangofanana neyeyekuyeresa insulation kuramba.
Musiyano ndewekuti: dc leak test voltage inowanzokwira kupfuura megohmmeter voltage, uye inogona kugadziridzwa, megohmmeter, kana zvisina kudaro, yakakwirira kudarika kushanda kwehurema hunowanikwa nemegger, inonzwisa kuratidza crack porcelain insulation, mukati mesangweji. insulation inokanganiswa nehunyoro inokanganiswa nekunyorova uye kutsemuka kwenzvimbo, yakasununguka inodzivirira mafuta kushatisa, char padivi peiyo insulation, nezvimwe.
Dc voltage test uye leakage ikozvino kuyerwa kunyangwe iyo nzira yakafanana, asi basa rayo rakasiyana, rekutanga nderekuyedza kusimba kwekudzivirira, iyo bvunzo voltage yakakwira;Iyo yekupedzisira inoshandiswa kutarisa mamiriro ekudzivirira, iyo test voltage yakaderera.Naizvozvo, dc voltage kuramba ine kukosha kwakakosha kutsvaga kumwe kukanganisa kwenzvimbo, uye inoshandiswa zvakanyanya muyedzo yekudzivirira yeakakwira-voltage mota, tambo uye capacitor.Iine maitiro anotevera kana achienzaniswa neac pressure test.
1. Midziyo yekuedza yakareruka uye idiki
Dc standstand voltage test equipment yakareruka uye yakanakira kudzivirira kuyedzwa mumunda.Semuenzaniso, kune tambo dzetambo, kana ac inomira voltage bvunzo, capacitance ikozvino pakiromita ichave akati wandei ampere, ichida hombe yekuyedza midziyo.Kana iyo dc voltage bvunzo yaitwa, iyo chete insulation yekudonha yazvino (kusvika milliampere level) inopihwa mushure mekugadzikana.
2. Inogona kuyera leakage ikozvino panguva imwe chete
Dc inomira voltage bvunzo inogona kuratidza kukanganisa kusungirira mukudzivirira zvakanyanya nekuyera kuvuza ikozvino uku ichiwedzera zvishoma nezvishoma voltage.Mufananidzo 3-1 unoratidza mamwe akajairwa kuvuza ikozvino ma curve ejenareta insulation panguva yedc voltage inomira bvunzo.Nokuda kwekudzivirira kwakanaka, ikozvino inodonha inowedzera mutsara nemagetsi uye kukosha kwezvino kuduku, sezvinoratidzwa mu curve 1. Kana kuvhara kwakanyorova, kukosha kwezvino kunowedzera, sezvinoratidzwa mu curve 2. Curve 3 inoratidza kuvapo kwekukanganiswa insulation.Kana iyo leakage ikozvino inopfuura imwe mwero, chikonzero chinofanirwa kuzivikanwa kusvika pazvinobvira kubvisa.Kana iyo inodonha ikozvino yakatenderedza 0.5 nguva Ut yakakwira nekukurumidza, sezvakaratidzwa mune curve 4, ipapo jenareta iri panjodzi yekuputsika panguva yekushanda (kunze kwekuwedzeredza).
Kana dc voltage standstand test ikaitwa patambo dzemagetsi, kuverenga kwekudonha ikozvino kunowanzo shandiswa kutsvaga hurema.Semuyenzaniso, kana mutsauko weatatu-chikamu kuvuza ikozvino wakakurisa kana kudonha kwazvino kuchiwedzera nekukurumidza, bvunzo voltage inogona kuwedzerwa kana nguva yekumira kwevoltage inogona kuwedzerwa kuti uwane hurema zvichienderana nemamiriro chaiwo.
3. Kusanyanya kukuvadza kune insulation
Dc yakakwira voltage ine zvishoma kukuvadza kune insulation yechigadzirwa chakaedzwa.Kana iyo dc acting voltage yakakwira zvekuti kubuda kwechidimbu kunoitika mugomba remhepo, iyo counter yemagetsi munda inokonzereswa nechaji inogadzirwa nekubuda inonetesa simba remunda mugomba remhepo, nekudaro ichivharira chidimbu chekuburitsa mugeji remhepo.Kana iri ac voltage bvunzo, nekuda kwekuchinja kwekusingaperi kwegwaro remagetsi, senge mhepo gap discharge, imwe neimwe hafu yemafungu ekubuda zvishoma, kubuda uku kunowanzo kusimudzira kuparara kweorganic insulating materials, kuchembera kuderera, kuderedza insulation. kushanda, kuitira kuti zvikanganiso zvemunharaunda zviwedzere zvishoma nezvishoma.Naizvozvo, dc inomira voltage bvunzo zvakare ine hunhu hwekusaparadza bvunzo kune imwe nhanho.
Kuenzaniswa ne ac inomira voltage bvunzo, iyo yakashata yeDC inomira voltage bvunzo ndeye: nekuda kwekusiyana kwevoltage kugovera mukati meiyo insulation pasi pe AC neDC, bvunzo yeDC inomira voltage test haina kuswedera pedyo neicho chiri pasi pe AC.Naizvozvo, kune xLPE tambo, haina kukurudzirwa kushandisa DC voltage test, DC voltage test discharge haisi nyore kuisa yakachena, nyore kutungamira kubhadharisa kuchengetedza, kukuvadza bvunzo.
Kusarudzwa kwe dc voltage inomira test voltage zvakare idambudziko rakakosha, irevo kune insulation simba frequency AC inomira voltage uye ac, DC breakdown simba reshiyo, uye zvakanyanya zvichibva pane yekushanda ruzivo kusimudzira.Semuenzaniso, iyo stator mhepo yejenereta ndeye 2-2.5 nguva iyo yakatarwa voltage;Kune 3, 6, 10kV tambo, tora 5 ~ 6 nguva yakayerwa voltage, ye20, 35kV tambo, tora 4 ~ 5 nguva yeyakayerwa voltage, uye kune tambo dziri pamusoro pe35kV, tora 3 times the rated voltage.Iyo nguva ye dc voltage inomira bvunzo inogona kureba kupfuura iyo ye AC voltage inomira bvunzo, saka jenareta bvunzo ndeyekuwedzera yakatemerwa voltage ne 0.5 nguva dzechikamu chimwe nechimwe mumatanho, uye kugara kwe1min muchikamu chimwe nechimwe chekutarisa uye kuverenga kuvuza. kukosha kwazvino.Munguva yekuyedzwa kwetambo, iyo bvunzo voltage inofanirwa kuenderera mberi kwe5min yekutarisa uye kuverenga iyo kuvuza kwazvino kukosha.
Nguva yekutumira: Jul-06-2022
