Emerson NT5C06D user manual Verification, Installing the rectifier, Factory setting

Page 28

28 Installation and start-up

Verification

After completing the wiring of the power shelf perform the following:

Procedure 2 - Verification

Step

Action

1Verify that the power shelf has been mechanically secured.

2Verify that all the wiring performed is correct by using a voltmeter.

3Verify that all connections are mechanically correct (that is, tight, correct connector, correct marking etc.)

4Reinstall the AC and DC junction box cover on the left and right sides.

end-

Installing the rectifier

The NT5C06D rectifier is a plug-in unit intended for use in the MPS75 power shelf.

Procedure 3 - Rectifier installation procedure

Step

Action

1

Release the clamping bar by loosening the two captive screws

2

Remove the blank panel for the rectifier to be installed (place a finger in the

 

hole, lift up, pull forward, then lower to disengage upper tabs from the shelf

 

top). Store the panel at the bottom of the shelf, under the rectifier.

3

Ensure that both AC and DC circuit breakers are in the OFF position.

4

Use a voltmeter to verify that the AC supply at the input of the shelf is 208

 

/ 240 V AC nominal.

5

Carefully slide the rectifier in position on top of the stored blank panel.

6

Insure that the rectifier is firmly slid and seated into position.

7

Reinstall the clamping bar by securing the two captive screws.

end

Factory setting

The rectifier is factory set as indicated in Table 7.

Table 7 - Rectifier settings

 

Load

Slope load sharing method

 

Sharing

 

 

 

 

 

 

Rectifier Output Voltage (FLOAT)

54.5 V DC

± 0.1

V

Rectifier Output Voltage (EQUALIZE)

55.2 V DC

± 0.1 V

Rectifier High Voltage Shutdown (HVSD)

59.0 V DC

± 0.1

V

Rectifier Output Current Limit

30 A

± 0.5

A

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 List of Procedures List of FiguresShelf 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 Efficiency and Power Factor Output noise and rippleReliability 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 ActionInstalling the AC power AC cable wire sizeAWG for each rectifier Max for each rectifierDC Conductors Installation Power shelf individual AC connectionControl and Alarm Connections Connecting the DC power shelfRectifier Failure Alarm Rectifier 1 fail alarmRectifier 2 fail alarm Rectifier 3 fail alarmAC Line Fail Alarm Fan AlarmDC Circuit Breaker Sense FailA0384387 SIG NAL Cables FRO M Shelves Factory setting Installing the rectifierVerification Procedure 4 Starting up the rectifier Step High Voltage Shutdown Hvsd AdjustmentFloat Voltage Adjustment Rectifier meter accuracy= 52.2 + .15 V = 52.35 Current Limit Verification CL Ii Forced ShareLoad Sharing Load Share Adjustment Procedure Procedure 5 Adjusting the load share Step ActionSlope Load Share Forced Load ShareOperation Features Front panel controlsLocal float / equalize control High voltage shutdown Hvsd localStart-up delay IndicatorsRectifier failure alarm RFA Fan failure alarmSense fail alarm SEN Fail Local ON/OFF control AC breakerRemote ON/OFF control Remote voltage sensingParallel operation Sequential startDischarge of output capacitors Local / remote high voltage shutdown reset Power interface edge connectorInput AC voltage monitor 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 SEN Fail fault Erratic load faultCurrent or voltage float 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 Rectifier Fail Alarm Normally OpenNorthern Telecom Sense FailPage Part of Emerson Network Power