可控硅擊穿或，此類(lèi)故障不分品牌，因廠家而易，但都比接觸器的故障率低，而且主要問(wèn)題出現(xiàn)在餅式可控硅的安裝工藝上。
3.控制器燒壞
相對(duì)于軟啟動(dòng)器來(lái)講，控制器燒毀故障是嚴(yán)重的。有的廠家此類(lèi)故障造成的返修率已超過(guò)30%。進(jìn)口的或合資的廠家此類(lèi)問(wèn)題不多見(jiàn)。主要是控制器的電源和觸發(fā)電路以及輸入電路三部分容易燒毀。
4、軟啟動(dòng)器誤動(dòng)作
電動(dòng)機(jī)在運(yùn)行的裝態(tài)下因軟起動(dòng)器受干擾而停機(jī)在停止?fàn)顟B(tài)下因軟起動(dòng)器受干擾而起動(dòng)是時(shí)有發(fā)生，前者較普遍，后者只有兩個(gè)品牌發(fā)生過(guò)。究其原因，一是產(chǎn)品質(zhì)量問(wèn)題，二是和線路布局有關(guān)。但是凡是進(jìn)口或合資的軟啟都沒(méi)有上述現(xiàn)象，產(chǎn)品牌中此問(wèn)題比較多。
5、軟啟動(dòng)器內(nèi)部插接件接觸不良
軟啟動(dòng)器內(nèi)部插接件選用本來(lái)不是問(wèn)題，這是內(nèi)廠家容易忽略的問(wèn)題，經(jīng)常出現(xiàn)故障。進(jìn)口或合資廠家都不犯此類(lèi)的錯(cuò)誤。
ALLEN BRADLEY 20AE032A0AYNNNC0 AC DRIVE **
ALLEN BRADLEY 2094-BC02-M02 2094BC02M02
Allen Bradley 200hp Drive, #1395-B79-C5-P12-P50, SER-A, free shipping
ALLEN BRADLEY 1791-16BC SER. B DATE CODE: 10/02 *FACTORY SEALED*
ALLEN BRADLEY 1791-16AC 179116AC
Allen Bradley 1791-16AC Module 179116AC Ser. B (Pack of 3) - No Box
ALLEN BRADLEY 1785-LT3 1785LT3
ALLEN BRADLEY 1785-L60B PLC-5 ENHANCED PROGRAMMABLE E REV Y01 CONTROLLER B382919
ALLEN BRADLEY 1785-L20E/E 1785L20EE
ALLEN BRADLEY 1785-L20C15/F 1785L20C15F
ALLEN BRADLEY 1779-KP5R 1779KP5R
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ALLEN BRADLEY 1770-FL 1770FL
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ALLEN BRADLEY 1756-RM2 -FS- 1756RM2
ALLEN BRADLEY 1756-M2 1756M2
ALLEN BRADLEY 1756-L73 CONTROL LOGIX 8MB (CS)
ALLEN BRADLEY 1756-L72S -FS- 1756L72S
ALLEN BRADLEY 1756-L62S 1756L62S
ALLEN BRADLEY 1756-L61S 1756L61S
ALLEN BRADLEY 1747-L551 -FS- 1747L551
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ALLEN BRADLEY 1747-L543 1747L543
ALLEN BRADLEY 1747-L542C 1747L542C
ALLEN BRADLEY 150-B54NBR 150B54NBR
ALLEN BRADLEY 150-A97NB-D 150A97NBD
ALLEN BRADLEY 143677 143677
ALLEN BRADLEY 140U-K6D3-D40-MU SERIES A CIRCUIT BREAKER (MCCB),
ALLEN BRADLEY 1404-M805A-DNT 1404M805ADNT
ALLEN BRADLEY 1400-PB51A 1400PB51A
Allen Bradley 1395 Drive SCR 126547 Power Mod w 126511
ALLEN BRADLEY 1391-DES22-DI-AQB 1391DES22DIAQB