Emerson NT5C06D user manual Front panel controls, Features, Local float / equalize control

Page 34

34 Operation

Front panel controls

Figure 9 - NT5C06D - front view

Features

In addition to the features and performance characteristics described earlier, the rectifier provides the following features.

Local float / equalize control

The rectifier is equipped with a float / equalize switch. The rectifier normally delivers a float voltage set by the FLT potentiometer. When the switch is placed in the EQL position, the rectifier changes to equalize mode and boosts the output voltage to the value set by the EQL potentiometer.

High voltage shutdown (HVSD) - local

This potentiometer sets the internal threshold level for the local high voltage shutdown monitor circuit.

High voltage shutdown - remote

The rectifier can be shut down by an external (remote) HVSD signal from the controller only if it is delivering more than 3 A +/- 0.75 A.

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

Image 34

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 DescriptionApplications 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 DissipationTransportation 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 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 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 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 sensingParallel operation Sequential startDischarge 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 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 causesAppendix a Replacement parts CPCAppendix 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