限流型低压断路器及其在工程设计中的应用

:1004289X(2005)03-0015-04(,100101):,20/:,,,:;;;:TM56:BApplicationofCurrent-limitLowVoltageCircuitBreakerandItBeinginEngineeringDesignMAYing(ChinesePetroleumEngineeringConstructionCompany,Beijing100101China)Abstract:TherequirementsofthermalstabilitycheckshouldbedoneaccordingtotheinsulatedconuctorundershortcircuitconditioninLowvoltagedistributiondesignstandardandGeneralpowerdrivenequipmentdesignstan2dard.Itproposesthattoadoptthecurrent-limitlowvoltagecircuitbreakerisabettersolvingscheme.Theworkingprincipleofthecurrent-lmitlowvoltagecircuitbreakerandtheapplicationinjienshanpolyproplyleneengineeringdesignoftwohundredthousandtons/yeararesketched.Thustheconclusionasfollows:thecurrent-limitcircuitbreakerisoneoftheimportantdevelopmentorientationsofthelowvoltagecircuitbreaker.Itsmeaningisnotonlyititsecf,butcanreducelowvoltagecompletesetdistributiondeviceandthermalstabilityrequrementsbyalargemar2gin.Ithasmarkedtechnologyandeconomicsignificance.Keywords:currect-limitlowvoltagecircuitbreaker;thermalstabilitycheck;current-limitingcharacteristiccurve;predictiveshortcircuitcurrent11.1GB50054-954.2.1:,GB50055-932.5.4:,,1.220/,,2000kVA,(PC)(MCC)()250m14051(2005.No.3)©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,37kW,MCC4.2.2:0.1s5s,:SItC103(mm2)I-(kA),33.58kA();t-(s);,,ABB,15ms;C-,,1kV1150.1s,S35mm2,,35mm2,,,:1);380V;2),380V;3),;4)2000kVA,;,,;,,22.1,,(0.01s),,,,,,2.220/,,,,,(100)37kW,,,3,,,,,:3.1,1,()3.2,:1),(2);2):(A2S)Ti2dt(A2S),1,W=RTi2dt,R=161(2005.No.3)©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.12(3);131,Icc2(t)(),,,(Icc/4)(/16),3.3(:)1),,,;2),,,3ms;3),,;4)(1ms),;5),()3.4:1):,;2):,,;3):,,,;4):,,;5)420/ABB,20/,ABBS2X8037kW4:3kW,,In=8.5A,Im()=13In=110A,33.58kA(Is),(32)71(2005.No.3)©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2AkwkvarkwhAkwkvarkwh%12-1#71.131.731.50.7178055.522.4100.8968012.924-1#6528.724.60.757005020.36.90.926301025-5#18072.566.30.73200015054.130.60.87190056,,25%,50%,,,,:2004-10-17(14)3)(200-195)n/100,L;4)L=L-L3,,(TTL)D21DM(25W)(1030km)(TTLRS232RS485)(0.25)RS232D21DM,TTLD21DM,,4,,,45000m,:2005-01-24(17)S2X80R8.54kA(Ip),10ms,,2.5mm2;35mm2250m,4current-limitingcurvesat400VforSACEIsomaxS2X80circuit-breaker,,,,,:2005-05-2023(2005.No.3)©1995-2006TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.