Danfoss TTS300

4.21 DC Capacitor Bus Bar Assembly
TheDCBusBarAssemblyincludesthebusbars,DCcapacitors,SnubberCapacitors,andBleedResistors(orBalance
Board).RefertoFigure4-176DCBusComponentsIdentificationTTS/TGS/TTH/TGHRev.FandEarlier(Except
TTS300/TGS230)andFigure4-177DCBusComponentsIdentificationTTS/TGS/TTH/TGHRev.H(Except
TTS300/TGS230)onpage166.
TheSCRsoutputDCvoltagetothebusbars.
TheDCcapacitorsserveasenergystorageandfilteroutthevoltagerippleassociatedwiththeoperationofthe
rectifiercircuitandanyvoltageunbalanceinthe3-phasesupply.
TheSnubberCapacitorsreducenoiseassociatedwiththeInverterswitchingfrequency.
TheBleedResistors(orBalanceBoard)areusedtodischargethecapacitorsafterpowerisremovedtoallowthe
compressortobeservicedsafely.
Figure 4-176 DC Bus Components Identification TTS/TGS/TTH/TGH Rev. F and Earlier (Except TTS300/TGS230)
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M-SV-001-EN Rev. H-1/23/2023 Page 165 of 294