Vacon NX Active Front End User Manual

Contents

1vacon • 6 SafetyTel. +358 (0) 201 2121 • Fax +358 (0)201 212 2051.1 Warnings1.2 Safety Instructions1.3 EarthingThe Active Front End unit and LCL filter must always be earthed with an earthing conductorconnected to the earthing terminal.The components of the power unit, LCL filter and pre-charging circuit are live when theActive Front End is connected to AC supply. Coming into contact with this voltage isextremely dangerous and may cause death or severe injury. The control unit isisolated from mains potential.The control I/O-terminals are isolated from the mains potential. However, the relayoutputs and other I/O-terminals may have dangerous control voltage present evenwhen the Active Front End is disconnected from the AC supply.Do not touch the components on the circuit boards. Static voltage discharge maydamage the components.The Active Front End, LCL filter and optional components are used for fixedinstallations only.Do not perform any measurements when the Active Front End is connected to the ACsupply.After having disconnected the Active Front End from the AC supply, wait until the fanstops and the indicators on the keypad go out (if no keypad is attached see the indica-tor through the keypad base). Wait 5 more minutes before doing any work on ActiveFront End connections. Do not even open the cover before this time has expired.Do not perform any voltage withstand tests on any part of Active Front End. There is acertain procedure according to which the tests shall be performed. Ignoring thisprocedure may result in damaged product.Before connecting the Active Front End to AC supply, make sure that the Active FrontEnd front and cable covers are closed.Before doing any work on Common DC bus, system shall be earthen.9000.emf9000.emf13006.emf13006.emf13006.emf13006.emf13006.emf13006.emf13006.emf