Danfoss VLT HVAC Operating Instructions Manual

Also see for VLT HVAC: Instructions Operating instructions Design guide Instruction Instruction manual

Contents

2.4.3 Motor ConnectionWARNINGINDUCED VOLTAGE!Run output motor cables from multiple frequencyconverters separately. Induced voltage from output motorcables run together can charge equipment capacitors evenwith the equipment turned off and locked out. Failure torun output motor cables separately could result in deathor serious injury.• For maximum wire sizes see 10.1 Power-dependentSpecifications• Comply with local and national electrical codesfor cable sizes• Motor wiring knockouts or access panels areprovided at the base of IP21 and higher(NEMA1/12) units• Do not install power factor correction capacitorsbetween the frequency converter and the motor• Do not wire a starting or pole-changing devicebetween the frequency converter and the motor• Connect the 3-phase motor wiring to terminals96 (U), 97 (V), and 98 (W)• Ground the cable in accordance with groundinginstructions provided• Torque terminals in accordance with theinformation provided in 10.4.1 ConnectionTightening Torques• Follow motor manufacturer wiring requirementsThe three following illustrations represent mains input,motor, and earth grounding for basic frequency converters.Actual configurations vary with unit types and optionalequipment.130BA266.10+DC BR- BM A I N SL1 L2 L391 92 93RELAY 1 RELAY 299- LC -U V WMOTORIllustration 2.9 Motor, Mains and Earth Wiring for A-Frame Sizes91L1 92L2 93L3 96U 97V 98W88DC- 89DC+ 81R- 8R+130BA390.119995Illustration 2.10 Motor, Mains and Earth Wiring for B-Frame Sizesand Above Using Shielded CableInstallation VLT® HVAC Drive Operating InstructionsMG11AH02 - VLT® is a registered Danfoss trademark 152 2