Emerson 200I/48-NT5C05C Front panel LEDs, AC on ac voltage monitoring, CL current limit indicator

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34 Functional description

4.2.3. Front panel LEDs

Table 10 - Designation of the LEDs on the front panel

LED	Color	Description
AC ON	Green	Input ac voltage operational
CL	Yellow	Current Limit
EQL	Yellow	Rectifier is in equalize mode
FAN ALM	Red	Fan fail alarm
HVSD	Red	High voltage shutdown
RFA	Red	Rectifier fail alarm
SEN FAIL	Red	Remote sense fail
THSD	Red	Thermal shutdown

AC ON ( ac voltage monitoring )

The rectifier monitors the input voltage and if the voltage exceeds the set limit, it will inhibit its operation and trigger a rectifier failure alarm

( RFA ). The rectifier will resume its normal operation automatically when the specified input voltage has been re-established.

CL ( current limit indicator )

This LED lights up if the rectifier is in current limit. The rectifier limits the output current to 205 A + 5 A ( adjusted in the factory ), 50% to 105% of the rated output current.

EQL ( equalize )

Indicates the rectifier is in equalizing mode.

FAN ALM ( fan failure alarm )

This LED lights up when the FAN ALM is activated due to a defect in the fan system. The fan configuration includes redundancy to ensure the rectifier will continue working properly if one of the fans fails. If only one fan fails, a rectifier failure alarm RFA will not be triggered. It is, however, imperative to repair or change the fan unit as soon as possible to preserve this redundant feature.

UM5C05C P0745680 Standard 6.00 October 2001

Emerson Energy Systems

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Contents Helios Modular Switch Mode Rectifier 200I/48 NT5C05C Page Emerson Energy Systems Page Publication history This page is left blank intentionally Contents List of Figures List of ProceduresList of Tables Ac female plug in a 1200 a cabinet This page is left blank intentionally General information Purpose of this manualModels and mounting configurations Typical mounting in a cabinet or frameSpecifications Mechanical and electrical specificationsOperation specifications and ambient conditions Transportation Ambient conditions for the rectifier OperatingConditions Storage conditionsAmbient conditions of a 1200 a cabinet Mechanical specifications of the NT6C43CB 1200 a cabinetOutput voltage Tools and test equipment InstallationMounting configurations Protecting the premisesPreventing personal injury Personal safety and protecting the equipmentPreventing damage caused by over-tightening Optimizing the life of the equipmentProtecting against electrical shocks Procedure 1 Installing the rectifier in a frame Step Action Installing in a frameInstalling in a cabinet Short circuit hazardProcedure 2 Installing a rectifier in a cabinet Step Action Anchoring the cabinetCabling and connecting Installing the rectifierConnecting the dc output terminals to the busbars Connecting ac to the rectifiers Electrical connections should meet standardsHazardous potentials Cabling ac the NT5C05CA / CB rectifiers Connecting ac to the rectifier NT5C05CC Connecting the control signals Controller NT NT6C25BA or NT6C25BBMonitoring of the shunt current Pin assignment for connectors J7 to J12Function Input/ Output Pin assignment for connector J13 Function Overview Input circuit Functional descriptionOutput circuit Description of the front panel Breakers DC circuit breaker Monitoring and control circuitsOutput capacitors AC breakerSwitches, controls and LEDs Front panel controls and LEDsFront panel LEDs CL current limit indicatorFAN ALM fan failure alarm AC on ac voltage monitoringLocal and remote adjustments and controls RFA rectifier failure alarmSEN Fail sense fail alarm Hvsd high voltage shutdownRectifier input / output signals to the controller Switches DescriptionDesignation Description Volt / AMP digital meter switch Remote equalize control EQLRectifier parallel operation Slope sharing SLSForced sharing FS Local and remote Hvsd reset Remote HvsdSetting the start-up delay Switch Position Delay SECControl signals on connector P1 Start up delay DIP switchRemote on / OFF control TR CB OFF NC This page is left blank intentionally Standard settings for the rectifier Parameter Setting Standard settingsOperation Procedure 9 Starting up the rectifier Step Action Starting up and adjustingAdjusting the high voltage shutdown Hvsd Adjusting the slope share Adjusting the equalize voltage EQLVerifying the current limit Adjusting the forced load sharing Replacing the air filter MaintenanceReplacing the fan unit Preventing short circuits Calibrating the Volt / Amp MultimeterRe-assembling Resetting the rectifier after an Hvsd high voltage shutdown RemotelyThis page is left blank intentionally Troubleshooting Diagnosing system faults Fault symptom Possible causesTroubleshooting Appendix a Replacement parts Part Number CPCAppendix a Recommended Replacement Parts Local toll-free prefixes Appendix B Technical service assistanceCountry Prefix United States Canada Europe Asia and the Pacific Toll-free technical assistance numbersCaribbean and Latin America Middle-East Cala Abbreviations and acronyms RFA Page Helios Modular Switch Mode Rectifier 200I/48 NT5C05C