Emerson NT5C06D Start-up delay, Test points V+, Indicators, Rectifier failure alarm RFA

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Operation 35

Start-up delay

This unit does not have a start-up delay.

Test points (V+, V-)

Test points allow the user to measure the voltage at the point of regulation. A 100 ohm PTC resistor is placed in series with both leads to prevent damage caused by short circuits at the jack terminals.

Indicators

Table 8 - Indicators

LAMP	COLOR	DESCRIPTION
DESIGNATION
RFA	Red/Green	Rectifier Fail Alarm / normal operation
FAN ALM	Red	Fan Fail Alarm

Rectifier failure alarm (RFA)

The rectifier incorporates facilities for monitoring its operational status and extends a global alarm upon detection of an internal failure. An abnormal or out of range AC input voltage, an internal fuse failure, any circuit breaker opening, any system or internal shutdown (for example: Thermal or HVSD), or any internal failure causing a disappearance of power switching, will trigger the RFA alarm and light up the RFA LED (color red) located on the front panel. If the disappearance of switching, however, is caused by an incorrect adjustment of the output FLT voltage, resulting in no output load, the RFA will not be triggered since no real failure will have occurred.

Fan failure alarm

Loss of all or part of the cooling system activates the FAN ALM and lights up the appropriate LED on the front panel. An RFA will be triggered, the rectifier will be inhibited and both a FAN ALM and RFA will be generated.

The defective fan cooling fan unit can be ordered and replaced by the customer.

Internal high voltage shutdown (HVSD)

The rectifier is equipped with a high voltage monitor. Whenever the rectifier output voltage exceeds a preset value adjustable from -52 V to -59.5 V, the rectifier shuts down. The rectifier will attempt to restart itself automatically after an HVSD. However, if another HVSD occurs within approximately 5 minutes, the rectifier will shut down, lock out and transmit an RFA. This function is independent of the output load condition. The AC breaker must be toggled to reset the unit.

Helios Rectifier 25/48 Installation and User Manual

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Contents P0831010 Standard 7.00 May Helios Rectifier 25/48 Single Phase -48V, 25 aPage Helios Rectifier 25/48 Single Phase -48V, 25A Page Publication history This page is left blank intentionally Contents Contents List of Tables List of ProceduresList of Figures ShelfThis page is left blank intentionally Description IntroductionEquipment Identification MPS75 NT5C10CX  power shelf 23-inchApplications MPS75 Modular Power Shelf-NT5C10C with 8-pin signal cables NT5C06D Switch Mode Rectifier Electrical specifications SpecificationsElectrical specifications Heat Dissipation Efficiency and Power FactorOutput noise and ripple ReliabilityStorage Environmental specifications OperatingTransportation Specifications Tools and test equipment Installation and start upInstalling the power shelf Procedure 1 Installing the power shelf Step Action Wiring the power shelfMax for each rectifier Installing the AC powerAC cable wire size AWG for each rectifierPower shelf individual AC connection DC Conductors InstallationConnecting the DC power shelf Control and Alarm ConnectionsRectifier 3 fail alarm Rectifier Failure AlarmRectifier 1 fail alarm Rectifier 2 fail alarmSense Fail AC Line Fail AlarmFan Alarm DC Circuit BreakerA0384387 SIG NAL Cables FRO M Shelves Verification Installing the rectifierFactory setting Rectifier meter accuracy Procedure 4 Starting up the rectifier StepHigh Voltage Shutdown Hvsd Adjustment Float Voltage Adjustment= 52.2 + .15 V = 52.35 Load Sharing Ii Forced ShareCurrent Limit Verification CL Forced Load Share Load Share Adjustment ProcedureProcedure 5 Adjusting the load share Step Action Slope Load ShareOperation High voltage shutdown Hvsd local FeaturesFront panel controls Local float / equalize controlFan failure alarm Start-up delayIndicators Rectifier failure alarm RFARemote voltage sensing Sense fail alarm SEN FailLocal ON/OFF control AC breaker Remote ON/OFF controlDischarge of output capacitors Sequential startParallel operation Thermal shutdown Local / remote high voltage shutdown resetPower interface edge connector Input AC voltage monitorPower interface connections Signal interface connectorControl signal connections Float / equalize MaintenanceProcedure 6 Adjusting the float / equalize Step Fan failure High voltage shutdown HvsdCooling fan Fan replacement NT5C06D rear view Power shelf This page is left blank intentionally System fault diagnosis Fault symptom Possible causes TroubleshootingAlarm indication RFA fault Fault symptom Possible causes SEN Fail faultErratic load fault Current or voltage float faultCPC Appendix a Replacement partsAppendix a Replacement parts Country Appendix B Technical service assistanceLocal toll-free prefixes United States Canada Europe Asia and the Pacific Appendix B Technical service assistanceToll-free technical assistance numbers List of terms and acronyms Sense Fail Rectifier Fail AlarmNormally Open Northern TelecomPage Part of Emerson Network Power