Transcription
Busbar Design Guide
Busbar Construction: TypesRelevant physical properties of conductor materials used in busbar constructionMetalDensity @ 20 C(lb/in3)CTE @ 20 C(x10-6m /m C)Thermal Conductivity @ 20 C(W/m K)SpecificationCopper 1100.32317388ASTM B-152QQ-C-576Copper 1010.32317383 – 391ASTM B-152QQ-C-576Brass 26030819.9120ASTM B-36QQ-B-613Aluminum 6061- T65100.09823.6154ASTM-B236
Busbar Construction: TypesRelevant electrical properties of conductor materials used in busbar constructionMetalResistivity (ρ) @ 20 CΩ sqmil/ftConductivity % IACS@ 20 CThermal Coefficient ofResistivity (α) @ 20 C(10-2/ C)Copper 1108.1101.393Copper 1018.1101.393Brass 260290.062800.098Aluminum 6061- T65113.3562.423
Typical Busbar SizesIf this program recommends sizes that do not fit into the ranges below, change either the number of conductors orthe section thickness of the busbar and recalculate the minimum cost solutionThicknessRange of Widths1/16”1/2-2”3/8”1/2 – 4”3/16”1/2 – 4”1/4”1/2 – 12″3/8″3/4 – 12″1/2″1 – 12″3/4″4 – 12″
Busbar Construction: LaminationInsulation Material ChoiceMaterialCostMylarLowNomexMediumFR1 ValoxMediumKaptonVery HighFR4/PhenolicMediumEpoxyEmbeddingMediumPowder CoatingLowColorsClearWhiteOff WhiteTanOff sTempIndexUL 94V-2 Coating105 CUL 94V-0 Polyamide220 CPaperUL 94V-0125 CUL 94V-0TMONotesExternal InsulationAbrasion ResistantInternal InsulationHigh Dielectric StrengthEasy to FabricateHigh DielectricUL 94V-0 Film240 CHigh DielectricUL 94V-0125 C/105 CHigh VoltagesEdge ProtectionUL 94V-0150 CEdge ProtectionUL 94V-0125 CComplex Shapes, Holesand Edges
Busbar Construction: PlatingMetalConductivityThermal Coefficient ofResistivity (α) @ 20 C(10-2/ C)Tin13.6.42ASTM B545, MIL-T-10727Nickel11.8.48AMS 2403,AMS-QQ-N-290, QQ-N290Silver105.8.38ASTM B700Solder Alloy 60/4010.40AMS-P-81728, MIL-P-81728Specification
Busbar Construction: Terminations Tabs Studs PEM Fastons PCB Connectors Radsok Pins7
Busbar Construction: TerminationsFloating spacerfor optimalmechanicaltoleranceStandard spacerfor easy levelingStandoff spacer withstud for easyleveling andconnection (cableshoe, resistor.)Double spacer foreasy leveling andconnecting on bothsides (snubber.)Tapped spacerfor leveling upconnecting pointCompliance tostandards forworldwide useCaptive screwfor easy andsecuremountingThreadedinsert for fastconnectingCasted link forreducing impedanceand cost8
Busbar Construction: TerminationsSerted studfor universalboltedconnectionFast-On tabWireterminal forbare wireconnectionDouble bendingtab for deep andcost effectivelevelingExtra crosssection ctionThickinsulantclosing fordeep andlimited areaSemi rigidembossmentfor lessconstraintsIntegratedbarrier forincreasedcreepingdistanceEmbossmentfor costeffectiveleveling9
ASTM B-152 QQ-C-576 Copper 101 0.323 17 383 –391 ASTM B-152 QQ-C-576 Brass 260 308 19.9 120 ASTM B-36 QQ-B-613 Aluminum 6061- T651 00.098 23.6 154 ASTM-B236
