Danfoss VLT AutomationDrive FC 300 Operating Instructions Manual

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Contents

Danfoss VLT AutomationDrive FC 300 Operating Instructions Manual Manual pdf 7 page image

2 Safety2.1.1 Safety NoteWARNINGThe voltage of the frequency converter is dangerouswhenever connected to mains. Incorrect installation of themotor, frequency converter or fieldbus may cause damageto the equipment, serious personal injury or death.Consequently, the instructions in this manual, as well asnational and local rules and safety regulations, must becomplied with.Safety Regulations1. The frequency converter must be disconnectedfrom mains if repair work is to be carried out.Check that the mains supply has been discon-nected and that the necessary time has passedbefore removing motor and mains plugs.2. The [Off/Reset] key on the LCP of the frequencyconverter does not disconnect the equipmentfrom mains and is thus not to be used as a safetyswitch.3. Correct protective earthing of the equipmentmust be established, the user must be protectedagainst supply voltage, and the motor must beprotected against overload in accordance withapplicable national and local regulations.4. The earth leakage currents are higher than 3.5mA.5. Protection against motor overload is set by1-90 Motor Thermal Protection. If this function isdesired, set 1-90 Motor Thermal Protection to datavalue [ETR trip] (default value) or data value [ETRwarning].NOTEThe function is initialised at 1.16 x rated motor current andrated motor frequency. For the North American market:The ETR functions provide class 20 motor overloadprotection in accordance with NEC.6. Note that the frequency converter has voltageinputs other than L1, L2 and L3, when loadsharing (linking of DC intermediate circuit) andexternal 24 V DC have been installed. Check thatall voltage inputs have been disconnected andthat the necessary time has passed beforecommencing repair work.Installation at High AltitudesWARNINGAt altitudes above 3 km, contact Danfoss regarding PELVWarning against Unintended Start1. The motor can be brought to a stop by means of digitalcommands, bus commands, references or a local stop,while the frequency converter is connected to mains. Ifpersonal safety considerations make it necessary to ensurethat no unintended start occurs, these stop functions arenot sufficient.2. While parameters are being changed, the motor maystart. Consequently, the stop key [Reset] must always beactivated; following which data can be modified.3. A motor that has been stopped may start if faults occurin the electronics of the frequency converter, or if atemporary overload or a fault in the supply mains or themotor connection ceases.WARNINGTouching the electrical parts may be fatal - even after theequipment has been disconnected from mains.Also make sure that other voltage inputs have beendisconnected, such as external 24 V DC, load sharing(linkage of DC intermediate circuit), as well as the motorconnection for kinetic back up.2.1.2 General WarningWARNINGTouching the electrical parts may be fatal - even after theequipment has been disconnected from mains.Also make sure that other voltage inputs have beendisconnected, (linkage of DC intermediate circuit), as wellas the motor connection for kinetic back-up.Before touching any potentially live parts of the frequencyconverter, wait at least as follows:380-480 V, 132-200 kW, wait at least 20 minutes.380-480 V, 250-630 kW, wait at least 40 minutes.Shorter time is allowed only if indicated on the nameplatefor the specific unit. Be aware that there may be highvoltage on the DC links even when the Control Card LEDsare turned off. A red LED is mounted on a circuit boardinside both the frequency converter and the active filter toindicate the DC bus voltages. The red LED will stay lit untilthe DC link is 50 V DC or lower.Safety VLT Automation Low Harmonic Drive Operating Instructions6 MG34O202 - VLT® is a registered Danfoss trademark22