(四)雷击浪涌防护设计技术(msw3h)

BorisMa 3540386030504020906080253340ƒƒ21)1()(ττttmeeAUtu−−−=A=1.0371=0.4074S2=68.22S010203040506070809010000.10.20.30.40.50.60.70.80.91time(uS)voltage(V)ƒ∫∞∞−−=dtetuGtjωω)()()11111()(122ωττωτωjjAUGm++−+=ƒ0123456010203040506070frequencyamplitude012345600.10.20.30.40.50.60.70.80.91frequencyamplitudeƒƒ0510152025303540455000.10.20.30.40.50.60.70.80.91time(uS)current(A)τtmetIAti−=3)(ƒ∫∞∞−−=dtetiGtjωω)()(4)1(6)(ωτωjAIGm+=ƒ012345600.0050.010.0150.020.0250.030.0350.040.0450.05frequencyamplitude012345600.10.20.30.40.50.60.70.80.91x10-4frequencyamplitudeLit.:IEC61024-1-1RstûE=î·Rstitû·îµs3s2s1332211∆i/∆tTime∆tU∆t∆i0.010.030.10.31310amµHM11001010.10.010.001q=16mm²q=50mm²∆i⎯∆tqUaaM1≈16µHU=16·150=2400kV∆ikA⎯=150⎯∆tµsq=50mm²U10m10masU∆i⎯∆ta1010.10.010.0010.1·10-30.01·10-30.10.3131030smµHM2a=10ma=3ma=1ma=0,3ma=0,1ma=0,03ma=0,01mM2≈4.8µHU=4.8·150=720kV∆ikA⎯=150⎯∆tµsU10m1m10m0.10.3131030smnH⎯mM'31001010.10.010.001b=10mmb=3mmb=1mmbU∆i⎯∆tslM'3≈0.60nH/mU=0.60·10·150=900V∆ikA⎯=150⎯∆tµsU3mm1m10mslU∆i⎯∆tbs(m)0.10.3131030nH⎯⎯mmM'4l=10ml=3ml=1ml=30ml=100m1010.10.010.001M'4≈0.48nH/mmU=0.48·3·150=216V∆ikA⎯=150⎯∆tµs1m3mmU10maûss⎛di⎞ûs=ku2·⎜⎟max.⎝dt⎠(di/dt)max.ûs100kA/µsa=10m500kVs=1mku2=5000VkA/µs()L1L2L3PEN20kVRst2c1a1b12a2b11a1b2a2b2cLightningProtectionZoneLPZLEMPLEMPLEMPLEMPLPZ2LPZ2LPZ2LPZ3LPZ3LPZ3SEMPSEMPLPZ1LPZ1LPZ1LPZ0ALPZ0LPZ0AALPZ1LPZ1LPZ1üüüüüLPZ0BLPZ0LPZ0BBMüLPZ0BLPZ0LPZ0BBüüü“LPZ0BLPZ0LPZ0BBLEMPLEMPüüLPZLPZLPZZEBBEBBDEHNguardTyp275DEHNDEHNportBlitzstromableiterDEHNL1L2L3Ntutuƒ10mA1mA100mA1A10A100A1kA100200(V)ABCDEFutufdcufruƒƒƒ100V/sƒƒ5ƒƒƒufdcufdc1.8Uƒ••••••ƒ10-810-610-410-21001021041020501002005001000ƒ1mAU1mA,UNƒ(8/20us)ƒ(8/20us)ƒ(0.75U1mA)ƒ()ƒMin(U1mA)(1.8~2)UdcMin(U1mA)(2.2~2.5)UacƒƒƒƒILIL20uA(U1mA100V)IL80uA(U1mA100V)•••••TVS—TransientVoltageSuppressorƒVRMVbrVcIPPIRM+-+-TVSƒVRMƒVbr(1mA)ƒVC(IPP)TVSƒIRMTVSTVSƒIPPƒPPPƒCTVSTVSƒ‾TVSƒIPPØØØTVSƒTVSƒTVS•••••TVS(us)(ns)(ps)(1kA~100kA)(0.11kA~100kA)(0.1kA~1kA)VVVtttƒLM1M2M3PENƒPELNM1M2M3min(Ufdc)1.2max(UP)UPUPƒLNPEM1M2M3L1L2C1C2M6M4M5C3Fuse-48VTVSƒ‾‾ƒƒE1T1Hd)()75.04ln303.2(002.0HdHHLµ−=cmbcH)()2235.05.02ln303.2(002.0HHcbcbHHLµ++++=HdL=2.8uHd=6.68mmbcHb=35mm,c=1mmL=1.95uH9±ƒ±9ƒƒ•ƒ••ƒƒ••ƒ•‾