130BA219.1111 BackplateFigure 3.25 Mounting with BackplateFor adjustable frequency drives with protection rating IP66,use a fibre or nylon washer to protect the epoxy coating.130BA392.1121341 Backplate2 Adjustable frequency drive with IP66 enclosure3 Backplate4 Fiber washerFigure 3.26 Mounting with Backplate for Protection RatingIP663.6.3 AccessTo plan accessibility for cabling before mounting, refer tothe drawings in chapter 8.1 AC Line Input ConnectionDrawings (3-phases) and chapter 8.2 Motor ConnectionDrawings.3.7 Options and AccessoriesOptionsFor ordering numbers, see chapter 6 Type code andSelectionLine power shielding• Lexan® shielding mounted in front of incomingpower terminals and input plate to protect fromaccidental contact when the enclosure door isopen.• Space heaters and thermostat: Mounted on thecabinet interior of F frames, space heaterscontrolled via automatic thermostat preventscondensation inside the enclosure. Thethermostat default settings turn on the heaters at10 °C (50 °F) and turn them off at 15.6 °C (60 °F).RFI filters• Adjustable frequency drive feature integratedClass A2 RFI filters as standard. If additional levelsof RFI/EMC protection are required, they can beobtained using optional Class A1 RFI filters, whichprovide suppression of radio frequencyinterference and electromagnetic radiation inaccordance with EN 55011.Residual current device (RCD)Uses the core balance method to monitor ground faultcurrents in grounded and high-resistance groundedsystems (TN and TT systems in IEC terminology). There is apre-warning (50% of main alarm setpoint) and a mainalarm setpoint. Associated with each setpoint is an SPDTalarm relay for external use, which requires an externalwindow-type current transformer (supplied and installed bythe customer).• Integrated into the adjustable frequency drive’ssafe torque off circuit• IEC 60755 Type B device monitors, pulsed DC,and pure DC ground fault currents• LED bar graph indicator of the ground faultcurrent level from 10–100% of the setpoint• Fault memory• TEST/RESET keySystem Integration VLT® AQUA Drive FC 20268 Danfoss A/S © 09/2014 All rights reserved. MG20N62233
