ITT IM213 Manual

A SERVICE OF

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9

WARNING

Hazardous

voltage

Mounting the Controller

Section 5 (continued)

Note

Donotblocktheheatsink(ns)andfansanddonotsetanythingontheunits.

Warning

Thecontrolleraccesscovershouldalwaysbesecurelyfastenedtothecontrolboxdue

tothedangerousvoltage/shockhazardinsidetheunit.Alockcanbeusedtoprevent

unwantedentry.

Power Supply and Wiring

Section 6

Power Supply

Note

InstallationandmaintenanceMUSTbeperformedbyproperlytrainedandqualiedpersonnel.

AlwaysfollowtheNationalElectricalCode(NEC)orCanadianElectricCode(CEC),aswellasall

state,localandprovincialcodeswhenwiringthesystem.

Thetypeoftransformerandtheconnectioncongurationfeedingadriveplaysanimportantroleinitsperformance

andsafety.Thefollowingisabriefdescriptionofsomeofthemorecommoncongurationsandadiscussionoftheir

virtuesandshortcomings.Alwaysaskwhattypeofpowersystemthesitehasbeforesizingthedrive.

Delta/Wye with grounded Wye neutral

Thiscongurationisoneofifnotthemostcommon.Itprovidesrebalancingofunbalancedvoltagewitha30

degreephaseshift.Dependingontheoutputconnectionsfromthedrivetomotor,thegroundedneutralmay

beapathforcommonmodecurrentcausedbythedriveoutput.