Abnormality thiab kev kho ntawm voltage transformer
Kev zam:
(1) Peb-phase voltage qhia tsis sib npaug: ib theem yog txo (yuav yog xoom), lwm yam ob theem yog ib txwm, kab voltage yog txawv txav, los yog nrog lub suab thiab teeb liab teeb liab, tej zaum yuav yog hais tias lub siab voltage los yog tsawg voltage fuse ntawm lub transformer yog tshuab.
(2) Lub ntsiab lus nruab nrab tsis zoo hauv av, thiab peb qhov -phase voltage qhia tsis sib npaug: ib theem poob (yuav ua tau xoom), lwm ob theem nce (txog rau kab hluav taws xob) lossis lub pointer viav vias, uas tej zaum yuav yog ib qho -theem hauv av txhaum lossis lub hauv paus Yog tias peb qhov -theem voltage nce tib lub sijhawm thiab tshaj cov kab hluav taws xob (tus pointer tuaj yeem viav vias mus rau qhov kawg), nws yuav yog zaus faib lossis siab - zaus resonance.
(3) Lub siab -voltage fuse tau tshuab ntau zaus, uas tej zaum yuav yog vim muaj kev puas tsuaj loj rau cov rwb thaiv tsev sab hauv, xws li luv luv - Circuit Court faults ntawm winding txheej los yog lem.
(4) Nyob rau hauv qhov nruab nrab point zoo grounding system, thaum lub busbar yog switched tawm, lub theem voltage nce thiab viav vias ntawm ib tug tsawg zaus, uas feem ntau yog ib tug series resonance tshwm sim; Yog tias tsis muaj kev ua haujlwm, theem hluav taws xob tam sim ntawd nce lossis poob qis, nws yuav ua rau lub rwb thaiv tsev sab hauv ntawm lub transformer puas, xws li luv luv -circuit faults nyob rau hauv lub rwb thaiv tsev txhawb winding, ntawm winding txheej los yog ntawm lem.
(5) Lub ntsiab lus nruab nrab yog siv tau zoo. Thaum lub voltage transformer muab tso rau hauv lub lag luam, qhov qhia ntawm lub voltmeter yog tsis ruaj khov. Tej zaum nws yuav yog qhov kev sib cuag hauv av ntawm N (X) kawg ntawm qhov siab -voltage winding tsis zoo.
(6) Disconnection ntawm voltage transformer Circuit Court.
Txoj kev:
1. Raws li cov kev cai cuam tshuam ntawm kev tiv thaiv relay thiab cov khoom siv tsis siv neeg, tawm ntawm qhov kev tiv thaiv cuam tshuam los tiv thaiv malfunction.
2. Tshawb xyuas seb qhov fuses siab thiab tsis tshua muaj hluav taws xob thiab tsis siv neeg cua hloov pauv yog qhov qub. Yog tias lub fuse raug tshuab, qhov laj thawj yuav tsum raug pom thiab hloov tam sim ntawd. Thaum nws tau tshuab dua, nws yuav tsum tau ua tib zoo saib xyuas.
3. Xyuas seb tag nrho cov connectors ntawm lub voltage Circuit Court yog xoob los yog disconnected, thiab seb lub switching Circuit Court puas muaj kev sib cuag tsis zoo.
