ABB GPS4827 User manual

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© Copyright 2021 ABB. All rights reserved.
PRODUCT MANUAL
GPS4827 Infinity Power System
User’s Guide
Product Manual
Ordering Code 850022019
Issue 1
January 2012

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© Copyright 2021 ABB. All rights reserved.
Notice:
The information, specifications, and procedures in this manual are subject to change without notice. ABB Power assumes no responsibility
for any errors that may appear in this document.

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© Copyright 2021 ABB. All rights reserved.
PRODUCT MANUAL
GPS4827 Infinity Power System
User’s Guide
Table of Contents
1. Introduction ··································································································································· 5
GPS4827················································································································································ 5
Customer Service Contacts···············································································································6
2. System Description······················································································································· 7
Overview ··············································································································································· 7
Architecture·········································································································································· 9
3. Galaxy Millennium II Controller ·································································································· 13
4. Rectifiers ······································································································································17
NE050AC48ATEZ ································································································································17
5. AC Input Panels ··························································································································· 21
Overview ·············································································································································· 21
6. Battery Connection Panels········································································································· 23
7. DC Distribution Panels ··············································································································· 25
Function ·············································································································································· 25
8. External Return Bars ··················································································································· 31
Overview ············································································································································· 31
9. Millennium II Controller Operation ···························································································· 35
Controller Connections ···················································································································· 37
Installing Circuit Packs ·····················································································································38
Thermal Probes··································································································································42
USB Interface ·····································································································································43
Local Port············································································································································43
Wiring Alarm Outputs·······················································································································43
Wiring Alarm and Control Inputs ····································································································46
Fuses ···················································································································································50
Front Panel Display···························································································································· 51
Controller Defaults····························································································································54
Controller Display Menu Maps ········································································································ 61

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10. Acceptance Testing······················································································································71
Introduction ········································································································································71
Tools and Test Equipment ················································································································71
Test Precautions·································································································································71
Test Sequences·································································································································· 72
11. Circuit Boards······························································································································ 81
Overview ············································································································································ 81
12. Specifications···························································································································· 83
Rectifier··············································································································································85
13. Safety········································································································································· 87
Safety Statements···························································································································· 87
14. Maintenance and Replacement ································································································ 89
Requirements····································································································································89
Rectifier Installation and Replacement Procedures ···································································89
15. Troubleshooting Procedure······································································································ 91
Preliminary········································································································································· 91
Troubleshooting Procedure············································································································92
16. Product Warranty························································································································· 93
17. Revision ······································································································································· 95

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© Copyright 2021 ABB. All rights reserved.
1. Introduction
GPS4827
ABB Power developed the Galaxy Power System GPS 4827 to support -48 volt telecommunications
powering solutions in worldwide markets. The GPS 4827 combines 50-ampere, fan-cooled,
switchmode rectifiers, microprocessor control technologies, battery and load disconnect/reconnect
options, and a comprehensive line of fuse and circuit breaker dc distribution options in a modular
front-access design. This modularity ensures easy access, simplified installation and maintenance, and
allows the system to expand in capacity as power needs grow.
With 1,800-ampere maximum capacity, distribution flexibility, and universal ac input capability, the
GPS 4827 supports switching, transmission, and wireless applications in central office locations and
environmentally controlled remote sites (huts or vaults).
The main emphasis of this manual is to provide a general product description that will familiarize the
user with the main components of the system and to provide guidelines for the basic maintenance of
this Galaxy Power System.
The Millennium controller provides many advanced functions and features, including;
• Alarm Detection, Identification, and Reporting
• System and Component Status
• System and Feature Configuration
• System Alarm Thresholds
• Battery Management (Slope Thermal Compensation/Recharge Current Limit)
• Battery discharge testing
• Reserve Time Prediction
• Float/Boost Mode Control
• Low Voltage Disconnect Management
• Remote Access Control And Multiple Level Password Security
• History
• Statistics

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Customer Service Contacts
Customer Service, Customer Training, Technical Support, Product Repair and Return, and Warranty
Service
For customers in the United States, Canada, Puerto Rico, and the US Virgin Islands,
please dial 1-877-546-3243 (877 ABB) or for all other countries, please call 1-972-244-9288. This number
is staffed from 7:00 am to 5:00 pm USA Central Time Zone (GMT -6), Monday through Friday, on normal
business days. At other times, this number is still available, but for emergencies only. Services provided
include initiating the spare parts procurement process, ordering documents, product warranty
administration, and providing other product and service information.
For other customers worldwide the 800 number may be accessed after first dialing the Direct country
code for the country where the call is originating, or you may contact your local field support center or
your sales representative to discuss your specific needs.
On-Line Power Systems Product Manuals and Software
Power Systems product manuals and software are available on-line. Software includes Easy View and
SNMP MIB.

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© Copyright 2021 ABB. All rights reserved.
2. System Description
Overview
Block Diagram
A basic block diagram of the Galaxy Power System 4827 is shown in Figure 2-1. It illustrates the
arrangement and interconnection of the system components from the ac input to the dc output.
Figure 2-1 Block Diagram of the GPS4827
System Components
The power system accepts alternating current from the commercial utility or a standby ac power source
and rectifies it to produce dc power for the using equipment. The system’s control and alarm functions
interact with the rectifiers and the office. In addition, the system provides overcurrent protection and
charge, discharge, and distribution facilities. Battery reserve is connected in parallel and automatically
provides a source of dc power if the commercial or standby ac fails. Battery reserve can be engineered to
supply dc power for a specific period of time. In normal practice, battery capacity is sized to provide 3 to 8
hours of reserve time.

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AC Input: connects the commercial and/or standby ac power sources to the rectifiers within the system
and provides overcurrent protection. In some applications the ac service is wired directly to the rectifiers
and overcurrent protection is provided at the service panel.
Rectifiers: convert an ac source voltage into the dc voltage level required to charge and float the batteries
and to power the using equipment.
Controller: provides the local and remote control, monitoring, and diagnostic functions required to
administer the power system.
Batteries: provide energy storage for an uninterrupted power feed to the using equipment during loss of
ac input or rectifier failure.
DC Distribution Panel: provides overcurrent protection, connection points for the using equipment, and
bus bars used to interconnect the rectifiers, batteries, and dc distribution.
Battery Connection Panel: provides connection points for the battery strings through battery disconnect
fuses or contactors and current monitoring shunts.

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Architecture
Configurations
The GPS 4827 is a 7-foot cabinet that can provide up to 1800 amps of DC power in single or multiple
cabinets. Shown in Figures 2-2, 2-3 and 2-4.
Cabinets can contain ac distribution, dc distribution, a battery connection panel, rectifiers, and a
system controller. Cabinets can also be ordered as rectifier only or distribution only cabinets.
Illustrations
Figure 2-3 shows how supplemental cabinets may be added to grow the system for more distribution.
The rectifier output buses are interconnected to permit the cabinet to share current and ensure
common voltage references for all system rectifiers. The total system ampacities must not exceed
1800A.
Figure 2-2 Cabinet schematic

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Figure 2-3 Schematic of Two-cabinet System Architecture 1800A Maximum per system.
Figure 2-3 Schematic of Two-cabinet System Architecture 1800A Maximum per system.
Shared DC Power
Battery String
To Loads
AC
AC
Ground Cabinet
Ground
Shared DC Power AC
Battery String
Battery String
AC
System (CO)
Ground
Cabinet
Ground
AC
Ground
Cabinet
Ground
AC
Ground
To Loads
To Loads
Controller
Rectifier
Battery
Distribution
Cabinet
Rectifier
Battery
Distribution
Cabinet
Rectifier
Battery
Distribution
Cabinet