Danfoss VLT AutomationDrive FC 360 Design Manual

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Danfoss VLT AutomationDrive FC 360 Design Manual Manual pdf 11 page image

the necessary time has elapsed beforecommencing repair work.Warning against unintended start1. The motor can be stopped with digitalcommands, bus commands, references or a localstop, while the frequency converter is connectedto mains. If personal safety considerations (e.g.risk of personal injury caused by contact withmoving parts following an unintentional start)make it necessary to ensure that no unintendedstart occurs, these stop functions are notsufficient. In such cases, disconnect the mainssupply.2. The motor may start while setting theparameters. If this means that personal safetymay be compromised, motor starting must beprevented, for instance by secure disconnectionof the motor connection.3. A motor that has been stopped with the mainssupply connected, may start if faults occur in theelectronics of the frequency converter, throughtemporary overload or if a fault in the powersupply grid or motor connection is remedied. Ifunintended start must be prevented for personalsafety reasons, the normal stop functions of thefrequency converter are not sufficient. In suchcases, disconnect the mains supply.4. In rare cases, control signals from, or internallywithin, the frequency converter may be activatedin error, be delayed, or fail to occur entirely.When used in situations where safety is critical,e.g. when controlling the electromagnetic brakefunction of a hoist application, do not rely onthese control signals exclusively.WARNINGHigh VoltageTouching the electrical parts may be fatal–even after theequipment has been disconnected from mains.Make sure that all voltage inputs have been discon-nected, including load sharing (linkage of DCintermediate circuit), as well as motor connection forkinetic back up.Systems where frequency converters are installed must,if necessary, be equipped with additional monitoringand protective devices according to valid safetyregulations, such as laws on mechanical tools,regulations for the prevention of accidents, etc. Modifi-cations to the frequency converters via the operatingsoftware are allowed.NOTICEHazardous situations shall be identified by the machinebuilder/integrator responsible for considering necessarypreventive means. Additional monitoring and protectivedevices may be included, always according to validnational safety regulations, such as laws on mechanicaltools and regulations for the prevention of accidents.WARNINGDISCHARGE TIMEThe frequency converter contains DC-link capacitors,which can remain charged even when the frequencyconverter is not powered. Failure to wait the specifiedtime after power has been removed before performingservice or repair work, could result in death or seriousinjury.1. Stop the motor.2. Disconnect AC mains, permanent magnet typemotors, and remote DC-link power supplies,including battery back-ups, UPS, and DC-linkconnections to other frequency converters.3. Wait for the capacitors to discharge fully, beforeperforming any service or repair work. Theduration of waiting time is specified inTable 1.2.Voltage [V]Minimum waiting time (minutes)4 15380–480 0.37–7.5 kW 11–75 kWHigh voltage may be present even when the warning LEDs areoff.Table 1.2 Discharge Time1.4 Disposal InstructionEquipment containing electricalcomponents may not be disposed oftogether with domestic waste.It must be collected separately withelectrical and electronic waste accordingto local and currently valid legislation.1.5 Document and Software VersionThis manual is regularly reviewed and updated. Allsuggestions for improvement are welcome.Edition Remarks Software versionMG06B4xx Replaces MG06B3xx 1.4xIntroduction Design GuideMG06B402 Danfoss A/S © 09/2014 All rights reserved. 91 1