10vacon • 162 Active front end (NXA)Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/10.6 Liquid-Cooled RLC filters10.6.1 IntroductionVACON® Liquid-Cooled AFE units can be used with either Liquid Cooled or Air Cooled LCL filters.The standard Liquid Cooled LCL filters are named RLC filter. The RLC filter type codes can be seenfrom Table 62. The RLC filters are not included in the standard delivery of the AFE units and thereforthey need to be ordered reparately. More information about Air Cooled LCL filters can be found fromUD01190B, VACON® NX Active Front End User‘s Manual, FI9-13.10.6.2 Wiring diagramsThe RLC filter contains a 3-phase chokes (Lnet )on the mains side, capacitors bank (C bank ) and 3 pcsof 1-phase choke (Ldrive ) on the AFE side, Figure 87. The RLC also includes capacitors connectedagainst ground potential. There are resistors connected across the capacitors for discharging themwhen the LCL filter is disconnected from the input power. The discharging resistors are 10 MΩ, 500V and 0.5 W.Figure 87. VACON ® RLC filter wiring diagram3071_ukActive frontend unitUVWL driveL netCbankB-B+L out /LinL in /LoutL1in /L1 outL1CrfCrfCrfCrf CrfCrfCrfCrf CrfCrfCrfCrfRRRRRRL3L2 L2 in /L2 outL3in /L3 outL1out /L1 inL2out /L2 inL3out /L3 inL in /LoutL in /LoutLout /LinLout /LinL3L3L2L2L1 L1
