Danfoss FC 300 Operating Instructions Manual

Also see for FC 300: Operating instructions Instruction manual Design guide Design guide Design guide

Contents

Danfoss FC 300 Operating Instructions Manual Manual pdf 17 page image

2.4.1 RequirementsWARNINGEQUIPMENT HAZARD!Rotating shafts and electrical equipment can be hazardous.All electrical work must conform to national and localelectrical codes. It is strongly recommended that instal-lation, start up, and maintenance be performed only bytrained and qualified personnel. Failure to follow theseguidelines could result in death or serious injury.CAUTIONWIRING ISOLATION!Run input power, motor wiring and control wiring in threeseparate metallic conduits or use separated shielded cablefor high frequency noise isolation. Failure to isolate power,motor and control wiring could result in less thanoptimum frequency converter and associated equipmentperformance.For your safety, comply with the following requirements.• Electronic controls equipment is connected tohazardous mains voltage. Extreme care should betaken to protect against electrical hazards whenapplying power to the unit.• Run motor cables from multiple frequencyconverters separately. Induced voltage fromoutput motor cables run together can chargeequipment capacitors even with the equipmentturned off and locked out.Overload and Equipment Protection• An electronically activated function within thefrequency converter provides overload protec-tionfor the motor. The overload calculates thelevel of increase to activate timing for the trip(controller output stop) function. The higher thecurrent draw, the quicker the trip response. Theoverload provides Class 20 motor protection. See8 Warnings and Alarms for details on the tripfunction.• Because the motor wiring carries high frequencycurrent, it is important that wiring for mains,motor power, and control are run separately. Usemetallic conduit or separated shielded wire.Failure to isolate power, motor, and controlwiring could result in less than optimumequipment performance.• All frequency converters must be provided withshort-circuit and over-current protection. Inputfusing is required to provide this protection, seeIllustration 2.6. If not factory supplied, fuses mustbe provided by the installer as part of installation.See maximum fuse ratings in 10.3 Fuse Specifi-cations.L1L1L2L2L3L3GND91 92 93Fuses130BB460.10Illustration 2.6 Frequency Converter FusesWire Type and Ratings• All wiring must comply with local and nationalregulations regarding cross-section and ambienttemperature requirements.• Danfoss recommends that all power connectionsbe made with a minimum 75 °C rated copperwire.• See 10.1 Power-dependent Specifications forrecommended wire sizes.2.4.2 Earth (Grounding) RequirementsWARNINGGROUNDING HAZARD!For operator safety, it is important to ground thefrequency converter properly in accordance with nationaland local electrical codes as well as instructions containedwithin these instructions. Ground currents are higher than3,5 mA. Failure to ground the frequency converter properlycould result in death or serious injury.NOTEIt is the responsibility of the user or certified electricalinstaller to ensure correct grounding (earthing) of theequipment in accordance with national and local electricalcodes and standards.• Follow all local and national electrical codes toground electrical equipment properly• Proper protective grounding for equipment withground currents higher than 3,5 mA must beestablished, see Leakage Current (>3,5 mA)• A dedicated ground wire is required for inputpower, motor power and control wiringInstallation VLT®AutomationDrive OperatingInstructionsMG33AM02 - VLT® is a registered Danfoss trademark 132 2