Warnings; Safety Instructions; Earthing - Vacon NX Active Front End User Manual

vacon • 6
1.1

Warnings

The components of the power unit, LCL filter and pre-charging circuit are live when the
Active Front End is connected to AC supply. Coming into contact with this voltage is
extremely dangerous and may cause death or severe injury. The control unit is
isolated from mains potential.
9000.emf
The control I/O-terminals are isolated from the mains potential. However, the relay
outputs and other I/O-terminals may have dangerous control voltage present even
when the Active Front End is disconnected from the AC supply.
9000.emf
1.2

Safety Instructions

Do not touch the components on the circuit boards. Static voltage discharge may
damage the components.
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The Active Front End, LCL filter and optional components are used for fixed
installations only.
13006.emf
Do not perform any measurements when the Active Front End is connected to the AC
supply.
13006.emf
After having disconnected the Active Front End from the AC supply, wait until the fan
stops 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 Active
Front End connections. Do not even open the cover before this time has expired.
13006.emf
Do not perform any voltage withstand tests on any part of Active Front End. There is a
certain procedure according to which the tests shall be performed. Ignoring this
procedure may result in damaged product.
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Before connecting the Active Front End to AC supply, make sure that the Active Front
End front and cable covers are closed.
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Before doing any work on Common DC bus, system shall be earthen.
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1.3

Earthing

The Active Front End unit and LCL filter must always be earthed with an earthing conductor
connected to the earthing terminal.
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Safety