ASTEC NT5C06D - Page 54

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54 List of terms and acronyms

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

NO Normally Open

NT Northern Telecom

PCB Printed Circuit Board

RFA Rectifier Fail Alarm

RG+ Sensing Battery Positive

RC - Sensing Battery Negative

SEN FAIL Sense Fail

SH + Shunt Positive

SH - Shunt Negative

SLS Slope Load Sharing

TBD To be Determined

THSD Thermal Shutdown

TR Temporary Release

Main Page

Publication History5
Table of Contents7
Introduction11
Description11
Applications12
Equipment Identification12
- MPS75 NT5C10C(X)  Power Shelf (23-Inch)12
- Helios Rectifier 25/48  NT5C06D(X) -48 V / 25 a Switch Mode Rectifier13
- Figure 1 - MPS75 Modular Power Shelf-NT5C10C with 8-Pin Signal Cables13
- Figure 2 - MPS75 Modular Power Shelf- NT5C10C with 26-Pin Signal Connectors14
- Figure 3 - NT5C06D Switch Mode Rectifier14
Specifications15
Electrical Specifications15
- Table 1 - Electrical Specifications15
- Efficiency and Power Factor16
- Electromagnetic Interference (EMI)16
- Heat Dissipation16
- Output Noise and Ripple16
- Reliability16
Environmental Specifications17
- Operating17
- Transportation17
- Storage17
Installation and Start up19
Tools and Test Equipment19
Installing the Power Shelf19
- Wiring the Power Shelf20
Procedure 1 - Installing the Power Shelf20
- Installing the AC Power21
- Figure 4 - Power Shelf Common AC Connection21
- Table 2 - AC Cable Wire Size21
- Table 3 - AC Fuses21
- DC Conductors Installation22
- Figure 5 - Power Shelf Individual AC Connection22
- Control and Alarm Connections23
- Figure 6 - Connecting the DC Power Shelf23
- Table 4 - DC Cable Wire Size23
- Table 5 - Rectifier and Controller Interface Connections (8-Pin Connectors)24
- Table 6 - Rectifier and Controller Interface Connections (26-Pin Connector)24
- Figure 7 - no Controller, Remote Sensing Connection for 8-Pin Signal Cable Shelves26
- Figure 8 - no Controller, Remote Sensing Connection for a 26-Pin Signal Connector27
- Verification28
Installing the Rectifier28
- Factory Setting28
- Table 7 - Rectifier Settings28
Procedure 2 - Verification28
Procedure 3 - Rectifier Installation Procedure28
- Rectifier Meter Accuracy29
- Start-Up and Verification29
Procedure 4 - Starting up the Rectifier29
- Slope Load Share32
- Forced Load Share32
- Load Share Adjustment Procedure32
Procedure 5 - Adjusting the Load Share32
Operation33
Front Panel Controls34
Features34
- Local Float / Equalize Control34
- High Voltage Shutdown (HVSD) - Local34
- High Voltage Shutdown - Remote34
- Figure 9 - NT5C06D - Front View34
- Start-Up Delay35
- Test Points (V+, V-)35
- Indicators35
- Rectifier Failure Alarm (RFA)35
- Fan Failure Alarm35
- Internal High Voltage Shutdown (HVSD)35
- Table 8 - Indicators35
- Local ON/OFF Control (AC Breaker)36
- Remote ON/OFF Control36
- Remote Voltage Sensing36
- Sense Fail Alarm (SEN FAIL)36
- Current Limiting36
- Soft Start / Walk-In36
- AC Inrush Current36
- Sequential Start37
- Parallel Operation37
- Discharge of Output Capacitors37
- Input AC Voltage Monitor38
- Thermal Shutdown38
- Remote High Voltage Shutdown38
- Local / Remote High Voltage Shutdown Reset38
- Remote Equalize Control38
- Power Interface Edge Connector38
Figure 10 - Power Interface Connections39
Signal Interface Connector39
Figure 11 - Control Signal Connections40
Maintenance41
Float / Equalize41
Procedure 6 - Adjusting the Float / Equalize41
- Fan Failure42
- Fan Replacement43
High Voltage Shutdown (HVSD)42
Cooling Fan42
Procedure 7 - Replacing the Fan43
Figure 12 - NT5C06D Rear View44
Power Shelf45
Troubleshooting47
Alarm Indication47
- RFA Fault47
- Table 9 - System Fault Diagnosis47
UM5C06D ( 169-2071-504 ) P0831010 Standard 7.00 May48
- SEN FAIL Fault48
- Erratic Load Fault48
- Current or Voltage Float Fault48
Appendix A: Replacement Parts49
Appendix B: Technical Service Assistance51
Local Toll-Free Prefixes51
Toll-Free Technical Assistance Numbers52
List of Terms and Acronyms53
- Shelf53

ASTEC NT5C06D - Page 54

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