This page is left blank intentionally | Emerson NT5C06D instruction

46 Maintenance

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UM5C06D ( 169-2071-504 ) P0831010 Standard 7.00 May 2001

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Emerson NT5C06D user manual This page is left blank intentionally

Contents

Helios Rectifier 25/48 Single Phase -48V, 25 a P0831010 Standard 7.00 MayPage Helios Rectifier 25/48 Single Phase -48V, 25A Page Publication history This page is left blank intentionally Contents Contents Shelf List of ProceduresList of Figures List of Tables This page is left blank intentionally Introduction Description Applications MPS75 NT5C10CX  power shelf 23-inchEquipment Identification MPS75 Modular Power Shelf-NT5C10C with 8-pin signal cables NT5C06D Switch Mode Rectifier Electrical specifications SpecificationsElectrical specifications Reliability Efficiency and Power FactorOutput noise and ripple Heat Dissipation Transportation Environmental specifications OperatingStorage Specifications Installing the power shelf Installation and start upTools and test equipment Wiring the power shelf Procedure 1 Installing the power shelf Step Action AWG for each rectifier Installing the AC powerAC cable wire size Max for each rectifier DC Conductors Installation Power shelf individual AC connection Control and Alarm Connections Connecting the DC power shelf Rectifier 2 fail alarm Rectifier Failure AlarmRectifier 1 fail alarm Rectifier 3 fail alarm DC Circuit Breaker AC Line Fail AlarmFan Alarm Sense Fail A0384387 SIG NAL Cables FRO M Shelves Factory setting Installing the rectifierVerification Float Voltage Adjustment Procedure 4 Starting up the rectifier StepHigh Voltage Shutdown Hvsd Adjustment Rectifier meter accuracy = 52.2 + .15 V = 52.35 Current Limit Verification CL Ii Forced ShareLoad Sharing Slope Load Share Load Share Adjustment ProcedureProcedure 5 Adjusting the load share Step Action Forced Load Share Operation Local float / equalize control FeaturesFront panel controls High voltage shutdown Hvsd local Rectifier failure alarm RFA Start-up delayIndicators Fan failure alarm Remote ON/OFF control Sense fail alarm SEN FailLocal ON/OFF control AC breaker Remote voltage sensing Parallel operation Sequential startDischarge of output capacitors Input AC voltage monitor Local / remote high voltage shutdown resetPower interface edge connector Thermal shutdown Signal interface connector Power interface connections Control signal connections Procedure 6 Adjusting the float / equalize Step MaintenanceFloat / equalize Cooling fan High voltage shutdown HvsdFan failure Fan replacement NT5C06D rear view Power shelf This page is left blank intentionally Alarm indication RFA fault TroubleshootingSystem fault diagnosis Fault symptom Possible causes Current or voltage float fault SEN Fail faultErratic load fault Fault symptom Possible causes Appendix a Replacement parts CPC Appendix a Replacement parts Local toll-free prefixes Appendix B Technical service assistanceCountry Toll-free technical assistance numbers Appendix B Technical service assistanceUnited States Canada Europe Asia and the Pacific List of terms and acronyms Northern Telecom Rectifier Fail AlarmNormally Open Sense FailPage Part of Emerson Network Power