YOKOGAWAALR121-S50三相异步交流电电机电器原因烧毁是常见的事情，查找原因方法如下：打开电动机的外壳，观察电动机的线包的颜色：1、电动机长久过载烧毁的，线包的颜色基本均匀分布。。。。。。2、由于电动机的供电电源缺项烧毁的，会在单独的线圈上看到。3、电动机由于修理不好局部线包闪断的，可考虑是绕制时造成的，例如绝缘垫不好，沁绝缘漆不好。。。。。4、电动机转子扫趟的，可以看到转子上有痕迹。。。。。。当然还有不少，例如电动机的接线盒内的：接线不牢靠，盒内入水。。。。。。电动机引线不好。。。。。。电机三相电流不平衡的可能原因:1、三相电压不平衡；2、电机三相绕组的直流电阻不平衡；3、三相电缆阻值不平衡；4、接线端子拧紧力矩不足导致缺相电机选型时要考虑的因素:1、电机的技术要求，包括电机的转矩、转速、供电电压、工作制等；2、使用环境的要求，包括环境温度、海拔；防护等级等3、其他应用特殊要求，（可选件的选择）电机长时间不用应如何选择存放环境:应选择1、干燥（相对湿度低于60%)；2、通风良好（无腐蚀性气体）、3、无振动；4、无粉尘；5、温度不低于负20度；6、存放温度高于室外温度约10度；7、覆盖MKS651CD2S2NRS-232MKS1150C-4350VMKS683B-29282MKS683B-29016,TYPE683MKS651D-2281319-00227-1MKSMKS1651D2SMKS651D-16202MKS651CD2S1NMKS153D-60-63-2A***50-125108A01MKST3BIA-27247brandnewVAT65040ISO100MKS651D-24942MKSGE50A004202R6V010MKS653B-8-200J-2MKS146C-FFFF0-1253B-2-50-2MKS1150C-071V652D-BB/MKSMKS683B-25580A***50-125108A36/MKS683B-25580VATGATEVALVE20046-XA44-1002/0020A-305850&MKS141A-13670----SMKST3BIA04N21V9212MKSM330B-WS22163MKSM330B-WS22164DS012-002973-1,253B-4-100-2MKS651DD2S2N2MKS683B-26033MKS600MKS152H-PO26A02***253B-1-2CF-1MKS656A100AMMVVN120317-G1MKS651CD2S2N+VALVE653B-21592+SSV63-B8-0005253B-2-50-2,3870-03055/MKS253BMKSHTR4.5,STR416,SPEC,6JP3MKS155-1160P-24VDCMKS153D-1-40-1MKS1479MKSGE50A001203RBV010MKSType1150C-479VMKS155-1160P-24VMKS153D-4-100-2MKST3BIA04N21V9212MKSType247BMKSAssy:653B-3-80-1MKSV-100-AM-SR-LV-24DMKSGE50A001203RBV010MKS651DD2S2N2MKS651CD2S1NMKS683B-26435MKS651DD2S2N2MKS651DD2S1N2MKS153F-16219JSP027-93A***/MKS50-123824A67/153D-20-40-2MKS653B-20-2CF-1MKSTYPE146146B-00000-1MKS683B-26033MKSTYPE146146B-00000-1MKS683683B-25580MKSHPS937D127877MKS1459C-05000RMMKS-155-1160P-24VDCPX245-02AA-***MKSTYPE146146C-00000-1MKSPPT-1A-100FCMKSTYPE146146C-AABOM-1MKS653B-21592,651CD2S2NMKS1309465935154-1160PISO160NW160MKS253A-1-40-2MKS653B-21592MKSHTR9699-1114MKS146C-FFFF0-1253A-3-80-2MKSMKS252E-14968TMKSL2-40-SP1-3160190-13041MKSP5A004103R6T023MKSHPS93-0859MKST3BIA-29455MKS683B-26435NGW414000MKS153D-12021MKS653B-21592MKSFRCA-26847MKSKF25.MKS247D-22656MKS750B-14936LDM-14937MKS152H-P053B-60-63-2MKS154-0100PMKSJ2-100-AM-225-CNSLHAMKS253A-11020MKSDPCA12T51CB00MKS100931764MKS99B0725MKSMF-80233959002MKSP99A-28229MKS253B-13964MKS1036564-001MKS627B-22683MKS651CD2S1NMKS4330-0008,NW-80,JE19CMKS623A-15132MKSNW100MKS153-13370MKS179A23CR3BMMKS93-7652MKSDLT2A213163AAMKSL2-40-SP1MKSP5A004103R6T023MKSP5A004202R6T023MKS651CD2S1NMKS1179B00714CR14VMKS151-0016KMKS155-1100P-24VDCMKS253A-4-100-2MKS2159B-00100RVMKS252C-1-VPO253B-1-40-2MKS/HPS99E0684NW100MKS51A11TCA2BA00393-8941NW163870-01352,AMATMKS155-1160P-24VDCMKSAS00008-04S00008-05MKS153D-6-160-2MKS253A-11102NW-100MKS253B-3-80-2253B3802MKSDPCA21T12C611100SCCMMKS253B-11087MKS99D04054630-1053MKS253B-3-80-2MKSRS-4851179A52CR15K--S100SCCMMKS1179B00713CR14VMKS93-53154DPCA21T12C611DPCA21T12C612RANGE100SCCMGASHeMKS253A253A-4-3-2AMAT3870-02345MKS253B-14110MKS/HPS99J1612NW100MKS626A13***.MKSHPS155-1100P-24VDCMKSLPV1-50-AK-CNVSKF50MKS653B-25255MKS252E-1-VPOMKS641A61PS1V32VMKS653B-21592MKSSet170M-27D,170M-44,170M-6BMKS656A040***SSNMKS653B-13194MKS99G1407,LPV1-25AKLKJ5,KL8475MKS100006129NVZ110-5MZ-M5-X51MKS258A-100MKS248A-V-100-CMKS627BU5TBD1BMKS653B-13064MKS1479B00422CR14MMKS252A-1MKS93-6782MKS253A-3-2-2ETVB-29895MKS-683B-26033MKS2179A12CR1BVMKS683B-267871971MKS153-0080P-24VDCMKS653B-252551970MKS153-0080P-24VDC1972MKS153-0080P-24VDC626A12TBENW100XNW100J2-080-AM-225CNHRHA-24D9E1500IDA-TOOL111MKS651CD2S1NMKS253B-11328MKS1160B-00200SVMKS2160B-00500SVMKSTYPE253B-3-2-2MKS253A-2-50-2)