en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro
en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro
en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro
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54Power factor comp<strong>en</strong>sation capacitorsPower factor comp<strong>en</strong>sation is not needed with AC drives. However, if a drive is to beconnected in a system with comp<strong>en</strong>sation capacitors installed, note the followingrestrictions.WARNING! Do not connect power factor comp<strong>en</strong>sation capacitors or harmonicfilters to the motor cables (betwe<strong>en</strong> the drive and the motor). They are not meant tobe used with AC drives and can cause perman<strong>en</strong>t damage to the drive orthemselves.If there are power factor comp<strong>en</strong>sation capacitors in parallel with the three phaseinput of the drive:1. Do not connect a high-power capacitor to the power line while the drive isconnected. The connection will cause voltage transi<strong>en</strong>ts that may trip or ev<strong>en</strong>damage the drive.2. If capacitor load is increased/decreased step by step wh<strong>en</strong> the AC drive isconnected to the power line: Ensure that the connection steps are low <strong>en</strong>ough notto cause voltage transi<strong>en</strong>ts that would trip the drive.3. Check that the power factor comp<strong>en</strong>sation unit is suitable for use in systems withAC drives i.e. harmonic g<strong>en</strong>erating loads. In such systems, the comp<strong>en</strong>sation unitshould typically be equipped with a blocking reactor or harmonic filter.Equipm<strong>en</strong>t connected to the motor cableInstallation of safety switches, contactors, connection boxes, etc.To minimize the emission level wh<strong>en</strong> safety switches, contactors, connection boxesor similar equipm<strong>en</strong>t are installed in the motor cable betwe<strong>en</strong> the drive and themotor:• EU: Install the equipm<strong>en</strong>t in a metal <strong>en</strong>closure with 360 degrees grounding for thescre<strong>en</strong>s of both the incoming and outgoing cable, or connect the scre<strong>en</strong>s of thecables otherwise together.• US: Install the equipm<strong>en</strong>t in a metal <strong>en</strong>closure in a way that the conduit or motorcable shielding runs consist<strong>en</strong>tly without breaks from the drive to the motor.Bypass connectionWARNING! Never connect the supply power to the drive output terminals U2, V2and W2. If frequ<strong>en</strong>t bypassing is required, employ mechanically connected switchesor contactors. Mains (line) voltage applied to the output can result in perman<strong>en</strong>tdamage to the unit.Planning the electrical installation
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