Megger ntsuas rwb thaiv tsev tsis kam nqus piv
Kev ntsuas cov kauj ruam:
1) Xaiv lub megohmmeter: Rau cov khoom kuaj nrog qhov ntsuas hluav taws xob qis dua 1KV, 1000KV megohmmeter yuav tsum raug xaiv; rau cov khoom kuaj nrog qhov ntsuas hluav taws xob siab tshaj 1KV, 2500KV megohmmeter yuav tsum raug xaiv.
2) Ua ntej disconnect lub davhlau ya nyob twg L thiab grounding davhlau ya nyob twg E, thiab tig lub megohmmeter mus rau qhov ntsuas ceev. Lub sijhawm no, tus taw tes yuav tsum taw tes rau; Tom qab ntawd luv luv-circuit L thiab E terminals, tig lub megohmmeter mus rau qhov ntsuas ceev, thiab tus pointer yuav tsum taw tes rau. Cov ntsiab lus rau "0". Txwv tsis pub, lub megohmmeter muaj qhov tsis zoo thiab yuav tsum tau hloov lossis kho kom txog thaum nws tsim nyog ua ntej siv.
3) Ua ntej kev sim, cov xaim ntawm cov khoom kuaj thiab lwm yam khoom siv yuav tsum tau muab tshem tawm thiab tso tawm tag nrho. Lub sij hawm tso tawm rau cov khoom siv uas muaj peev xwm loj yuav tsum tsis pub tsawg tshaj 2 feeb.
4) Xaiv txoj kev xaim kom raug raws li qhov chaw ntawm cov khoom kuaj, xyuam xim rau cov xaim yuav tsum tsis txhob ntev dhau, thiab xyuas kom meej tias muaj qhov cuam tshuam txaus ntawm cov xaim thiab cov khoom siv plhaub. Yuav ua li cas ntsuas kev tiv thaiv kev tiv thaiv kev nqus nrog megohmmeter
5) Yog tias tsuas yog ntsuas qhov ntsuas hluav taws xob, tig lub megohmmeter mus txog qhov ntsuas nrawm, tos lub pointer kom ruaj khov, nyeem tus nqi tom qab 1 feeb, thiab sau cov nqi rwb thaiv tsev; Yog tias qhov ntsuas qhov nqus yuav tsum tau ntsuas, rab riam hloov yuav tsum tau txuas nrog hauv series hauv Circuit Court Hloov, ua ntej crank lub megohmmeter mus rau qhov ntsuas ceev, kaw riam hloov, thiab lub sijhawm tib lub sijhawm, nyeem cov ntaub ntawv tiv thaiv kev tiv thaiv. ntawm 15s thiab 60s, thiab mam li xam qhov nqus piv K.
6) Tom qab kev ntsuas tiav lawm, cov kab hluav taws xob hluav taws xob yuav tsum raug txiav ua ntej, thiab tom qab ntawd lub megohmmeter yuav tsum tau nres kom tiv thaiv cov khoom kuaj nrog lub peev xwm loj los ntawm kev tawm ntawm lub megohmmeter thiab ua rau lub megohmmeter puas.
7) Siv tus pas nrig tawm kom tso cov electrode ntawm cov khoom kuaj mus rau hauv av. Txhawm rau txo cov pa taws tawm, cov resistors tsim nyog yuav tsum tau txuas nrog hauv cov kab hluav taws xob hauv hluav taws xob, thiab lub sijhawm tawm yuav tsum txaus, feem ntau tsis pub tsawg dua 2 feeb.
8) Sau thiab teeb tsa cov ntaub ntawv xeem: ua tib zoo sau lub npe, tus lej cim, daim ntawv teev npe, txoj haujlwm ntawm cov khoom siv, rwb thaiv tsev kub, ambient kub, rwb thaiv tsev tsis kam thiab kev nqus ntawm cov khoom kuaj.
Txuas nrog, qhov sib txawv ntawm cov txheej txheem ntawm kev ntsuas rwb thaiv tsev absorption ratio thiab ntsuas cov rwb thaiv tsev tsis kam
Cov txheej txheem rau kev ntsuas cov rwb thaiv tsev tiv thaiv kev nqus ntawm lub transformer:
1) Tshem tawm cov thawj thiab theem nrab busbars lossis xov hlau ntawm lub transformer;
2) So lub siab thiab qis voltage porcelain bushings huv si thiab xyuas cov megger kom raug;
3) Kev xaim kom raug raws li qhov yuav tsum tau ua ntawm txoj haujlwm telemetry;
4) Ob tus neeg ua haujlwm, ib tus neeg tig lub kov ntawm megohmmeter, thiab lwm tus neeg tuav cov insulated ib feem ntawm cov kab xeem ntawm "L" kawg, tig lub megohmmeter mus rau: 120r / min, thiab tus taw tes taw qhia rau ∞;
5) Kov qhov ntsuas "L" kom ruaj khov rau lub davhlau ya nyob twg ntawm lub tshuab hloov pauv, nyeem ib tus lej (R15) ntawm 15s, nyeem lwm tus lej (R60) ntawm 60s, thiab sau cov ntaub ntawv ntsuas kev co;
6) Nyeem tus nqi tom qab lub 'meter' koob yog qhov ruaj khov, ua ntej thim qhov "L" ntsuas kab thiab tom qab ntawd nres lub megohmmeter;
7) Siv tus pas nrig tso tawm kom tso tawm qhov hloov pauv hloov mus rau hauv av ua ntej thiab tom qab ntsuas ntsuas (lub transformer yog ib qho inductive load);
8) Sau cov transformer kub;
9) Co sim lwm yam khoom;
10) Tom qab kev ua haujlwm ntawm kev sib tw ua tiav, tshem tawm cov xov hlau luv luv interphase thiab rov qab mus rau lawv qhov qub qub.
11) Qhov ntsuas R60 yog qhov rwb thaiv tsev tsis kam ntawm lub transformer; Qhov tshwm sim ntawm R60 / R15 (R60 faib los ntawm R15) yog qhov nqus piv ntawm transformer.
