User guide

8.0 INPUT AC REQUIREMENTS

 Hazardofelectricalshock.Disconnectincomingpowerandwaitthreeminutesbeforeservicing

the drive. Capacitors retain charge after power is removed.

8.1 INPUT AC POWER REQUIREMENTS

8.1.1 VOLTAGE:

 Theinputvoltagemustmatchthedrive’snameplatevoltagerating.Voltagefluctuationmustnotvaryby

greater than 10% overvoltage or 15% undervoltage.

NOTE: Drives with dual rated input voltage must be programmed for the proper supply voltage - see

Parameter 0 - LINE VOLTS in Section 18.0 - DESCRIPTION OF PARAMETERS SECTION.

The drive is suitable for use on a circuit capable of delivering not more than 18,000 rms symmetrical

amperes,atthedrive’sratedvoltage.Threephasevoltageimbalancemustbelessthan2.0%phasetophase.

Excessivephasetophaseimbalancecancauseseveredamagetothedrive’spowercomponents.

 Motorvoltageshouldmatchlinevoltageinnormalapplications.Thedrive’smaximumoutputvoltagewill

equaltheinputvoltage.Useextremecautionwhenusingamotorwithavoltageratingwhichisdifferent

from the input line voltage.

8.1.2 SUPPLY TRANSFORMER kVA RATINGS:

 IfthekVAratingoftheACsupplytransformerisgreaterthantentimestheinputkVAratingofthedrive,

adriveisolationtransformer,ora2-3%inputlinereactor(alsoknownasachoke)mustbeadded.

8.2 INPUT FUSING AND DISCONNECT REQUIREMENTS

 A circuit breaker or a disconnect switch with fuses must be provided in accordance with the National

ElectricCode(NEC)andalllocalcodes.

The MICRO Series drive is capable of withstanding up to 150% current overload for 60 seconds. Select a

fuseormagnetictripcircuitbreakerratedat1.5timestheinputcurrentratingofthedrive(theminimum

sizeshouldbe10amps,regardlessofinputcurrentrating).RefertoSection5.0-DRIVERATINGS.

Minimum voltage rating of the protection device should be; 250 VAC for 240/120 VAC and 240/200 VAC

rated drives, and 600 VAC for 480/400 VAC and 590 VAC drives.

 Currentlimitingtypefusesshouldbeusedwheninputfusingisrequired.SelectClassCCorClassTfuses

withlowI2T value, ratedat200,000 AIC. Recommendedfusesare Bussman typeKTK-R, JJN, JJS or

equivalent.Similarfuseswithequivalentratingsbyothermanufacturersmayalsobeacceptable.

WARNING