American Power Conversion MX28B4800, MX28B2400 Rectifier Current Share Test, System Current Test

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Rectifier Current Share Test

Verify that the highest rectifier current and the lowest current are within 5 amps.

System Current Test

Verify the System current equal to the total of the rectifier currents. System current should equal the total current of the loads as well as any battery current.

Rectifier Alarm Test

1.Verify that all of the rectifiers report RFA Alarm is off.

2.Verify that the battery voltage reading on the voltmeter is negative (-)54.00 + 0.02Volts.

3.Remove 1 rectifier and verify that you get a Minor alarm for Rect 1 of n failure on the controller and the customer remote alarm panel.

4.Remove the second rectifier and verify that you get a Major alarm for Rect 2 of n failure on the controller and the customer remote alarm panel.

5.After the fan has completely stopped spinning, insert a plastic pen or plastic screwdriver into the fan blade of one of the rectifiers and reinsert both rectifiers

6.Verify that you get the fan fail alarm on controller and the customer remote alarm panel.

7.Remove the fan fail device.

System Temperature Test

Verify that the system temperature is correct.

Battery Current Test

1.Measure the battery current with a clamp-on meter.

2.Verify that the battery current is below 5 amps.

3.Verify that the displayed battery current is within + 5 amps. Adjust OEM/S Offset if required.

4.Determine the total battery capacity at the site:

Cells connected in series make up a string, and the capacity is determined by the capacity of a single cell. Add amp/hour capacity for all strings connected in parallel. Enter the total battery capacity in the appropriate box on the Site Form.

5.Determine the Max. Batt. Recharge rate:

Divide Total battery capacity by 20 hours and enter it in the appropriate box on the Site Form.

6.Verify that the Max. Batt. Recharge rate is set to the calculated value.

7.Remove AC power to the rectifiers purposely causing the battery discharge alarm to come on.

8.Verify that the System Current is 0 + 5 amps.

9.Verify that the battery current is within 5 % of the system current recorded previously.

10.Verify that the Battery Discharge Alarm is on.

11.Restore AC power to the rectifiers.

MX28B1200/2400 MX28B1200/4800 –48 VDC User’s Manual

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Contents VDC Power Systems Table of Contents Commissioning and Preventive Maintenance APC Worldwide Customer Support Limited Product Warranty Revision History Revision Date DescriptionSafety First General PrecautionsGeneral Information How to Use This ManualIntroduction 1 MX28B-1200 -48 VDC Power Plant Rectifier Bay 2 MX28B Block Diagram Unpacking Equipment InstallationMechanical Installation Room / LocationPower Bus Connections Mounting2 MX28B-1200-2400 has a maximum Circuit Breaker/LVD Ribbon Cable Connections 5 Circuit Breaker / LVD Expansion BoardVentilation AC Power ConnectionsFuse Alarm Ribbon Cable Connections 1 AC Input Wiring Battery Connections Planning the Battery InstallationConnecting the Battery Cables 1 Battery Cable Connection Locations2 Battery Probe Connection DC System GroundingDC Power Output Over-Current Protection DC Plug-in Circuit BreakersBreaker Part Number Rating 2 Plug-in Circuit Breakers DC Bolt-in Circuit Breakers 4 Bolt-in Circuit BreakersTelecom Fuses 5 Telecom FusesInstallation of Circuit Breakers and Fuses Plug-in Circuit Breaker InstallationBolt-in Circuit Breaker Installation 2 Circuit Breaker Alarm WiringTelecom Fuse Installation GMT Fuse InstallationCircuit Breaker Connections 1 to 50 Amps Load ConnectionsCable Size Considerations Circuit Breaker Connections 60-100 AmpsFront Panel DB9 Connection Monitoring and Relay Output ConnectionsGMT Fuse Connections Smart Cable DB9 ConnectionRJ45 Ethernet Connector Relay Output ConnectionsExternal Alarm Input Connections NO-NC-CRectifier Module Installation Battery Visual and Safety Inspection Commissioning and Preventive MaintenanceElectrical Installation Pre-Commissioning InspectionInitial Set-up AC Power UpCommissioning Rectifier Test DC Power UpBattery Power Up LVD TestUser Inputs Battery Temperature CompensationCircuit Breaker/ Fuse Test Output RelaysFinal Inspection Rectifier Management OperationTechnical Description System Voltage Control System ManagementSystem Output Capacity System CurrentBattery Charging and Protection Battery ManagementSystem Status and Alarm Reporting DC DistributionFront Panel User Interface Controls and IndicatorsBattery/Load Low Voltage Disconnect Status Alarms System Modules Batt PIN OEM Parameter Locations, Descriptions, and Default ValuesAddress Alarm ItemNo Alarms Switzer70.0 C Batt HT AlmBatt HT Thr Batt HV AlmCir Bkr 72 Almm+ Cir Bkr 1 Alm m+Major Comp HkneeHw Batt C Almm+ Fuse 1 AlmFuse 16 Alm Minor48.00 LVD ResetLVD Option LVD TripOut-Rly 6 Dly m+ Out-Rly 1 Dly m+Sec Relay MajorMRF28H54 DisableRect 1 Desc Rect 1ofN Almm+Sys LT Alm Sys HV AlmSys HV Thr Sys LT ThrTime 90025SYS MS System Module SET-ALM Setup DA Control Unit Menu StructureV e l C o n d L e v e l I r d L e v e l U r t h L e v e l SYS Sysin Modrec AM Info Modfuse LM Alias Fuse MOD Modlvd Modlvd LM Param Section Alarm Outputs Output RelaysFront Panel LED Indicators External Alarm Inputs Input Relays Description Command and Monitoring ProtocolRemote Monitoring Physical ConnectionsEquipment Preventive MaintenanceSystem Visual and Safety Inspection InspectionRectifier Current Test TestSystem Voltage Test Battery Current Test Rectifier Alarm TestSystem Temperature Test Rectifier Current Share TestBattery Temperature Test Battery Preventive Maintenance ProcedureFinal Inspection 1MRF28H54BV Rectifiers SpecificationsAC Input 1MRF28H54BV50 RectifiersVDC RectifiersPower Shelf Control Unit Compliance MechanicalEnvironmental Toll Free APC Worldwide Customer SupportUS and Canada WorldwideLimited Product Warranty