Emerson NT5C06D user manual Normally Open, Northern Telecom, Rectifier Fail Alarm, Sense Fail

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54 List of terms and acronyms

NO	Normally Open
NT	Northern Telecom
PCB	Printed Circuit Board
RFA	Rectifier Fail Alarm
RG+	Sensing Battery Positive
RC -	Sensing Battery Negative
SEN FAIL	Sense Fail
SH +	Shunt Positive
SH -	Shunt Negative
SLS	Slope Load Sharing
TBD	To be Determined
THSD	Thermal Shutdown
TR	Temporary Release

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

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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 TablesThis page is left blank intentionally Introduction DescriptionMPS75 NT5C10CX  power shelf 23-inch ApplicationsEquipment Identification MPS75 Modular Power Shelf-NT5C10C with 8-pin signal cables NT5C06D Switch Mode Rectifier Specifications Electrical specificationsElectrical specifications Reliability Efficiency and Power FactorOutput noise and ripple Heat DissipationEnvironmental specifications Operating TransportationStorage Specifications Installation and start up Installing the power shelfTools and test equipment Wiring the power shelf Procedure 1 Installing the power shelf Step ActionAWG for each rectifier Installing the AC powerAC cable wire size Max for each rectifierDC Conductors Installation Power shelf individual AC connectionControl and Alarm Connections Connecting the DC power shelfRectifier 2 fail alarm Rectifier Failure AlarmRectifier 1 fail alarm Rectifier 3 fail alarmDC Circuit Breaker AC Line Fail AlarmFan Alarm Sense FailA0384387 SIG NAL Cables FRO M Shelves Installing the rectifier Factory settingVerification Float Voltage Adjustment Procedure 4 Starting up the rectifier StepHigh Voltage Shutdown Hvsd Adjustment Rectifier meter accuracy= 52.2 + .15 V = 52.35 Ii Forced Share Current Limit Verification CLLoad Sharing Slope Load Share Load Share Adjustment ProcedureProcedure 5 Adjusting the load share Step Action Forced Load ShareOperation Local float / equalize control FeaturesFront panel controls High voltage shutdown Hvsd localRectifier failure alarm RFA Start-up delayIndicators Fan failure alarmRemote ON/OFF control Sense fail alarm SEN FailLocal ON/OFF control AC breaker Remote voltage sensingSequential start Parallel operationDischarge of output capacitors Input AC voltage monitor Local / remote high voltage shutdown resetPower interface edge connector Thermal shutdownSignal interface connector Power interface connectionsControl signal connections Maintenance Procedure 6 Adjusting the float / equalize StepFloat / equalize High voltage shutdown Hvsd Cooling fanFan failure Fan replacement NT5C06D rear view Power shelf This page is left blank intentionally Troubleshooting Alarm indication RFA faultSystem fault diagnosis Fault symptom Possible causes Current or voltage float fault SEN Fail faultErratic load fault Fault symptom Possible causesAppendix a Replacement parts CPCAppendix a Replacement parts Appendix B Technical service assistance Local toll-free prefixesCountry Appendix B Technical service assistance Toll-free technical assistance numbersUnited 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