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Atv71 Network Braking Units en v1

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   User's manual Retain for future use  Altivar 71 Network braking units VW3 A7 201 ... 241  3 Contents Before you begin______________________________________________________________________________________________ 4Steps for setting up the braking unit_______________________________________________________________________________ 5Checking the installation________________________________________________________________________________________ 6Recommendations___________________________________________________________________________________________ 13Characteristics______________________________________________________________________________________________ 14Sizing_____________________________________________________________________________________________________ 15Dimensions_________________________________________________________________________________________________ 19Mounting and temperature conditions____________________________________________________________________________ 21Recommendations for the electrical installation_____________________________________________________________________ 22Connection diagrams, fuses and associated cables__________________________________________________________________ 23Operation on a neutral IT (isolated or impedance grounded neutral) system_______________________________________________ 28Electromagnetic compatibility and wiring__________________________________________________________________________ 29Starting tests________________________________________________________________________________________________ 33Configuration_______________________________________________________________________________________________ 34Troubleshooting_____________________________________________________________________________________________ 36  4 Before you begin Read and understand these instructions before performing any procedure with thisbraking unit.  DANGER HAZARDOUS VOLTAGE ãRead and understand this User’s Manual before installing or operating the braking unit. Installation, adjustment, repair, and maintenance must be performed by qualified personnel.ãThe user is responsible for compliance with all international and national electrical standards in force concerning protective grounding of all equipment.ãMany parts in this equipment, including printed circuit boards, operate at line voltage. DO NOT TOUCH.Use only electrically insulated tools.ãDO NOT touch unshielded components or terminal strip screw connections with voltage present.ãDO NOT short across terminals PA and PC or across the DC bus capacitors.ãInstall and close all the covers before applying power or starting and stopping the drive.ãBefore servicing the braking unit-Disconnect the power and the control power supply. -Place a “DO NOT TURN ON” label on the disconnect at the head of the installation.-Lock the disconnect in the open position.ãDisconnect the power supply, including the 230V control power supply, before working on the equipment. Wait for the charging LED to go off. Then follow the DCbus voltage measurement procedure described in the drive Installation Manual to verify that the DC voltage is less than 45 VDC. The LEDs on the speed drive are not accurate indicators of the absence of DC bus voltage. Electric shock will result in death or serious injury.

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