Danfoss VLT 6002-6011 Installation, Operation And Maintenance Manual

Contents

Danfoss VLT 6002-6011 Installation, Operation And Maintenance Manual Manual pdf 2 page image

2DANGER!Rotating shafts and electrical equipment canbe hazardous. Therefore, it is stronglyrecommended that all electrical work conformto National Electrical Code (NEC) and all localregulations. Installation, start-up andmaintenance should be performed only byqualified personnel.Factory recommended procedures, included in this manual, should befollowed. Always disconnect electrical power before working on theunit.Although shaft couplings or belt drives are generally not furnished bythe manufacturer, rotating shafts, couplings and belts must be protectedwith securely mounted metal guards that are of sufficient thickness toprovide protection against flying particles such as keys, bolts andcoupling parts. Even when the motor is stopped, it should be consid-ered “alive” as long as its controller is energized. Automatic circuits maystart the motor at any time. Keep hands away from the output shaft untilthe motor has completely stopped and power is disconnected from thecontroller.Motor control equipment and electronic controls are connected tohazardous line voltages. When servicing drives and electronic controls,there will be exposed components at or above line potential. Extremecare should be taken to protect against shock. Stand on an insulatingpad and make it a habit to use only one hand when checking compo-nents. Always work with another person in case of an emergency.Disconnect power whenever possible to check controls or to performmaintenance. Be sure equipment is properly grounded. Wear safetyglasses whenever working on electric control or rotating equipment.Safety Guidelines1. The drive must be disconnected from the AC line before anyservice work is done.2. The “Stop/Off” key on the local control panel of the drive does notdisconnect the equipment from the AC line and is not to be used asa safety switch.3. Correct protective grounding of the equipment must be estab-lished. The user must be protected against supply voltage and themotor must be protected against overload in accordance withapplicable national and local regulations.4. Ground currents are higher than 3 mA.Warnings Against Unintended Start1. While the drive is connected to the AC line, the motor can bebrought to a stop by means of external switch closures, serial buscommands or references. If personal safety considerations make itnecessary to ensure that no unintended start occurs, these stopsare not sufficient.2. During programming of parameters, the motor may start. Becertain that no one is in the area of the motor or driven equipmentwhen changing parameters.3. A motor that has been stopped may start unexpectedly if faultsoccur in the electronics of the drive, or if an overload, a fault in thesupply AC line or a fault in the motor connection or other faultclears.4. If the “Local/Hand” key is activated, the motor can only be broughtto a stop by means of the “Stop/Off” key or an external safetyinterlock.NOTEIt is responsibility of user or person installingdrive to provide proper grounding and branchcircuit protection for incoming power andmotor overload according to National ElectricalCode (NEC) and local codes.The Electronic Thermal Relay (ETR) in UL listed VLTs provides Class20 motor overload protection in accordance with NEC in single motorapplications, when parameter 117 is set for “ETR TRIP 1”, “ETR TRIP2”, “ETR TRIP 3”, or “ETR TRIP 4”, and parameter 105 is set forrated motor (nameplate) current.Touching electrical parts may be fatal – even after equipment hasbeen disconnected from AC line. To be sure that capacitors havefully discharged, wait 14 minutes after power has been removedbefore touching any internal component.DANGER!