Danfoss VLT Refrigeration Drive FC 103 Design Manual

Also see for VLT FC 103: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

Danfoss VLT Refrigeration Drive FC 103 Design Manual Manual pdf 11 page image

ConventionsNumbered lists indicate procedures.Bullet lists indicate other information and description ofillustrations.Italicised text indicates:• Cross reference.• Link.• Footnote.• Parameter name, parameter group name,parameter option.All dimensions are in mm (inch).* indicates a default setting of a parameter.1.5 Safety SymbolsThe following symbols are used in this manual:WARNINGIndicates a potentially hazardous situation that couldresult in death or serious injury.CAUTIONIndicates a potentially hazardous situation that couldresult in minor or moderate injury. It can also be used toalert against unsafe practices.NOTICEIndicates important information, including situations thatcan result in damage to equipment or property.1.6 DefinitionsCoastThe motor shaft is in free mode. No torque on the motor.CT characteristicsConstant torque characteristics used for all applicationssuch as:• Conveyor belts.• Displacement pumps.• Cranes.InitialisingIf initialising is carried out (parameter 14-22 OperationMode), the frequency converter returns to the defaultsetting.Intermittent duty cycleAn intermittent duty rating refers to a sequence of dutycycles. Each cycle consists of an on-load and an off-loadperiod. The operation can be either periodic duty or non-periodic duty.Power factorThe true power factor (lambda) considers all theharmonics. The true power factor is always smaller thanthe power factor (cosphi) that only considers the 1stharmonics of current and voltage.cosϕ = P kWP kVA = Uλ x Iλ x cosϕUλ x IλCosphi is also known as displacement power factor.Both lambda and cosphi are stated for Danfoss VLT®frequency converters in chapter 7.2 Mains Supply.The power factor indicates to which extent the frequencyconverter imposes a load on the mains supply.The lower the power factor, the higher the IRMS for thesame kW performance.In addition, a high power factor indicates that theharmonic currents are low.All Danfoss frequency converters have built-in DC coils inthe DC link. The coils ensure a high power factor andreduce the THDi on the main supply.Set-upSave parameter settings in 4 set-ups. Change between the4 parameter set-ups and edit 1 set-up while another set-upis active.Slip compensationThe frequency converter compensates for the motor slip bygiving the frequency a supplement that follows themeasured motor load, keeping the motor speed almostconstant.Smart logic control (SLC)The SLC is a sequence of user-defined actions executedwhen the associated user-defined events are evaluated astrue by the SLC. (Parameter group 13-** Smart Logic).FC standard busIncludes RS485 bus with FC protocol or MC protocol. Seeparameter 8-30 Protocol.ThermistorA temperature-dependent resistor placed where thetemperature is to be monitored (frequency converter ormotor).TripA state entered in fault situations, such as when thefrequency converter is subject to an overtemperature orwhen it protects the motor, process, or mechanism. Restartis prevented until the cause of the fault has disappearedand the trip state is cancelled. Cancel the trip state by:• Activating reset, or• Programming the frequency converter to resetautomaticallyDo not use trip for personal safety.Introduction Design GuideMG16G202 Danfoss A/S © 08/2015 All rights reserved. 91 1