Safety Instructions; Overview; General Safety Instructions; Sine Filter Safety Instructions - ABB ACS800 User Manual

Safety instructions

Overview

This chapter states the general safety instructions that must be followed when
installing and operating drives with sine filters.
The material in this chapter must be studied before attempting any work on the
filters.
In addition to the safety instructions given below, read the complete safety
instructions of the specific drive (presented in the Hardware Manual accompanying
the drive) you are working on.

General safety instructions

WARNING! All electrical installation and maintenance work on the drive should be
carried out by qualified electricians.
The drive and adjoining equipment must be properly earthed.
Do not attempt any work on a powered drive. After switching off the supply voltage,
always allow the intermediate circuit capacitors 5 minutes to discharge before
working on the frequency converter, the motor or the motor cable. It is good practice
to check (with a voltage indicating instrument) that the drive is in fact discharged
before beginning work.
The motor cable terminals of the drive are at a dangerously high voltage when mains
power is applied, regardless of motor operation.
There can be dangerous voltages inside the drive from external control circuits even
when the drive mains power is shut off. Exercise appropriate care when working on
the unit. Neglecting these instructions can cause physical injury or death.

Sine filter safety instructions

The capacitors of the sine filter are discharged via the drive. Wait 5 minutes after
switching off the supply voltage before starting work on the filter. The voltage
between each output terminal of the drive (U2, V2, W2) and earth must be measured
with a multimeter (impedance at least 1 megaohm) to ensure that the drive is
discharged before beginning work.
If work is to be done on the sine filter capacitors, the voltage over the capacitors
must be measured to ensure they are discharged.
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Safety instructions