描述
互感器故障除了制造、材料選用、設(shè)計(jì)和出廠試驗(yàn)把關(guān)不嚴(yán)等原因外,還與運(yùn)行維護(hù)不及時(shí),發(fā)現(xiàn)問(wèn)題處理不及時(shí),以及年久失修等有直接關(guān)系。
二、絕緣試驗(yàn)檢測(cè)互感器故障的方法
1.通過(guò)油的色譜分析可以判斷出互感器局部放電和過(guò)熱性故障。
2.當(dāng)互感器密封不良受潮時(shí),如果絕緣電阻測(cè)量值降低即說(shuō)明繞組整體或局部受潮或劣化。對(duì)電容型電流互感器,如果末屏對(duì)地絕緣電阻低于1000mΩ,則應(yīng)測(cè)量末屏對(duì)地的tgδ,當(dāng)其值超過(guò)3時(shí),則互感器底部可能有水,同時(shí)應(yīng)注意與互感器歷年來(lái)的數(shù)據(jù)作比較和綜合分析。
3.電容型電流互感器主絕緣電容量與初始值比較,如差值超過(guò)±5%則應(yīng)查明原因。當(dāng)進(jìn)水受潮時(shí),因水的介電常數(shù)大于互感器絕緣材料的介電常數(shù),故實(shí)測(cè)的電容量比未進(jìn)水受潮時(shí)大;當(dāng)局部放電而使電容元件擊穿時(shí),電容量會(huì)因元件減少而增加,所以測(cè)量末屏電容量的大小是監(jiān)測(cè)電容型電流互感器絕緣的重要方法。
4.用tgδ診斷互感器的絕緣狀態(tài)。
(1)tgδ分析要注意監(jiān)測(cè)標(biāo)準(zhǔn),同時(shí)要重視其增長(zhǎng)率。例如實(shí)測(cè)某電容式電流互感器的tgδ為1.4%(《規(guī)程》標(biāo)準(zhǔn)為1.5%),兩年前實(shí)測(cè)該互感器的tgδ為0.41%,其增長(zhǎng)值達(dá)3.4倍,但如果認(rèn)為本次測(cè)量值未超標(biāo),就不予以重視,結(jié)果必然會(huì)導(dǎo)致互感2S發(fā)生故障,筆者甚至認(rèn)為互感器tgδ的增長(zhǎng)率比其絕對(duì)值更為重要和關(guān)鍵。此外對(duì)此類互感器還可以比較主屏和末屏的介損及絕緣電阻判斷受潮的程度。如某電流互感器主屏的tgδ=0.3%,絕緣電阻R=5000mΩ,末屏對(duì)二次及地的tgδ=4.1%,絕緣電阻R=150MΩ,說(shuō)明外層絕緣受潮但潮氣未進(jìn)入主絕緣,吊芯后發(fā)現(xiàn)箱底有水。
產(chǎn)品廣泛應(yīng)用于:電力、石油、礦井提升、港口、供熱、燃?xì)?、供水、污水處理、冶金、造紙、紡織、化工、水利等現(xiàn)代化工業(yè)領(lǐng)域!
我們這里有您急需的停產(chǎn)備件,
優(yōu)勢(shì)現(xiàn)貨,詢不到的,買不到的,請(qǐng)聯(lián)系我們!
絕 對(duì)優(yōu)勢(shì),絕 對(duì)低價(jià)!絕 對(duì)正品,優(yōu)質(zhì)的產(chǎn)品,一流的服務(wù),充足的庫(kù)存,
歡迎來(lái)電詢價(jià),我們將會(huì)給您最優(yōu)惠的價(jià)格!
主營(yíng):世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國(guó)AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國(guó)西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場(chǎng)輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
⑨Siemens(西門子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂(lè)):Indramat,I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
ABB 3HAB 6182-1 DSQC335 Robot Computer
ABB 3HAB8101-3/05D DSQC345B DriveUnit
ABB 3HAB8101-3/08C DSQC345C DriveUnit
ABB 3HAB8101-7/01C DSQC346C DriveUnit
ABB 3HAB8101-8 DSQC346G DriveUnit
ABB cable DSQC351 Interbus-S
ABB 3HAC 0373-1 DSQC361 Main Computer
ABB 3HAC3180-1 DSQC373 Robot Computer
ABB 900054 1Gb SD-card S3/S4 DDR
ABB 900056 1Gb SD-card S2 DDR
3HNE 00026 Teach Pendant
3HNE 00312-1 Teach Pendant
3HNE 00313 Teach Pendant
CHAA 3560-AXA Teach Pendant
ABB 3HAB9271-1/01B DriveUnit Dummy DriveUnit Dummy
ABB 57510001-AA DSCA 114 Print out board
ABB 57520001-U DSCA 121 Communication board
ABB 57160001-A DSDI 110 Digital input board
ABB 57160001-K DSDO 110 Digital output board
ABB YB161102-AH DSDX 110 Digital in/output board
ABB 57160001-TP DSDX B001 digital in-output board
ABB 57360001-U DSMB 124 Semiconductor memory board
ABB 57360001-AN DSMB 125 Semiconductor memory board
ABB 57360001-HG DSMB 127 Memory board
ABB 57330001-N DSMC 110 Floppy disk controller
ABB YB161102-AK DSPA 110 Axis computer
ABB 57310256-AF DSPC 150 Central processor
ABB 57310256-BA DSPC 153 Expand.single board computer
ABB 57310001-GP DSPC 157 Expand.single board computer
ABB YB161102-AD DSQC 103 Resolver power board
ABB YB161102-AF DSQC 105 Display board
ABB YB161102-BA DSQC 110 Programming board
ABB YB161102-BS DSQC 115 Resolver power board+2 analogue
ABB YB161102-BE DSQC 116 Power supply
ABB YB161102-BG DSQC 117 Resolver power board
ABB YB161102-BU DSQC 124 Terminal unit
ABB YB161102-BV DSQC 129 R/D board
ABB YB161102-CH DSQC 136 Safety board
ABB YB161102-CM DSQC 138 Terminal unit
ABB YB560103-AC DSQC 202 Robot computer
ABB YB560103-AS DSQC 208A External axis board
ABB YB560103-AL DSQC 209 Analogue I/O board
ABB YB560103-AM DSQC 210 Safety board
ABB YB560103-AN DSQC 211 Power supply
ABB YB560103-BF DSQC 215 Robot computer
ABB YB560103-AZ DSQC 220 Programming board
ABB YB560103-BD DSQC 223 PC Board digital I/O
ABB YB560103-BE DSQC 224 PC Board combi I/O
ABB YB560103-BK DSQC 227 Winchester interface
ABB YB560103-BD DSQC 228 Safety board
ABB YB560103-BN DSQC 230 Robot computer
ABB YB560103-BS DSQC 233 External axis board
ABB YB560103-BY DSQC 235A Rectifier
ABB YB560103-BZ DSQC 235B Rectifier
ABB YB560103-CA DSQC 236A Drive unit
DSQC 236B Drive
ABB YB560103-CC DSQC 236C Drive unit
ABB 3HAB2207-1 DSQC 236D Drive unit
ABB YB560103-CD DSQC 236G Drive unit
ABB 3HAB2245-1 DSQC 236H Drive unit
ABB 3HAA3563-AJA DSQC 236P Drive unit
ABB YB560103-CE DSQC 236T Drive unit
DSQC 239 Board-ABB RIO
ABB DSQC 241 Power supply
ABB YB560103-CM DSQC 242 Programming board
ABB 3HAA0001-CP DSQC 243 Serial measurement board
ABB 3HAA3563-ACA DSQC 245 Serial measurement board
ABB 3HAA3563-AAA DSQC 248 Programming board
ABB 3HAA3563-AGA DSQC 249A Rectifier
ABB 3HAA3563-AHA DSQC 249B Rectifier
ABB 3HAA3563-AD DSQC 252 System board
E3HAC028756-001 DSQC 253 SMB unit DSQC 573
E3HAA3563-AMA DSQC 253 Serial Measurement Board
E3E 042816 DSQC 253 Exch.Serial mes.DSQC 253W
6369901-218 DSQC 253 Serial Measurement Board
ABB 3HAB2211-1 DSQC 256A System board
ABB 3HAA3563-AUA DSQC 258 Power supply
ABB 3HAB8797-1 DSQC 266B Drive unit
ABB 3HAB8798-1 DSQC 266C Drive unit
ABB 3HAB8801-1 DSQC 266G Drive unit
ABB 3HAB8800-1 DSQC 266H Drive unit
ABB 3HAB8799-1 DSQC 266K Drive unit
ABB 3HAB8802-1 DSQC 266T Drive unit
ABB 3HAA3573-AAA DSQC 300 Board-Computer
ABB 3HAB2210-1 DSQC 300 Board-Computer