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MX28B200/400
-48 VDC POWER SYSTEMS
User’s Manual
(Document # 990-9133)
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Table of Contents 1 SAFETY FIRST! ...................................................................................................................... 1 1.1. WARNING SYMBOLS ......................................................................................................... 1 1.2. GENERAL PRECAUTIONS:................................................................................................. 1 2 INTRODUCTION ..................................................................
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4 OPERATION ..........................................................................................................................23 4.1. TECHNICAL DESCRIPTION...............................................................................................23 4.2. RECTIFIER MANAGEMENT...............................................................................................23 AC Input Power ..................................................................................................
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Revision History Revision Date By Description 1 31 JAN, 2002 JNF Converted to APC numbering 2 17 MAY, 2002 BET Updated Format Table of Figures FIGURE 2.1-1 MX28B-400 –48 VDC POWER PLANT .................................................................3 FIGURE 2.1-2 MX28B BLOCK DIAGRAM ...................................................................................4 FIGURE 3.4-1 BATTERY CABLE CONNECTION LOCATIONS..............................................10 FIGURE
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1 Safety First! It is very important to follow all safety procedures when unpacking, installing and operating any sort of power equipment. 1.1. Warning Symbols CAUTION: An indication that special care is required to prevent injury, equipment damage or misuse WARNING: An indication of an electrical hazard that may cause serious personal injury or death, catastrophic equipment damage or site destruction.. 1.2. General Precautions: WARNING: The DC power plant is suppl
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2 Introduction 2.1. General Information DC Power Plants from APC have unique features that make them easy to install, maintain, and upgrade. The rectifier units are modular and truly “hot-pluggable” into the shelf assembly without any separate AC wiring. All system settings are made from the system control unit that provides monitoring and control functions for each component of the system as well as alarm listings for system diagnosis and maintenance. The APC Model MX28B is a mo
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Figure 2.1-2 MX28B BLOCK DIAGRAM Page 4 MX28B200/400 –48 VDC User’s Manual (990-9133)
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2.2. How to Use This Manual Each section of this manual can be read in any order and should provide a complete explanation of the subject described by the title. However, the sequence of the sections is designed to provide a typical step-by-step process for successful use of the equipment. Safety First! Safety symbol description and general precautions. Introduction Brief system preview and explanation of manual usage. Installation How to unpack, install and commission the
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3 Installation 3.1. Unpacking Equipment Remove equipment from packing material and inspect for shipping damage or missing items. It is important to report damage or material shortages to the shipping carrier while a representative is on site. If concealed damage or material shortages are found at a later time, contact the shipper to make arrangements for inspection and claim filing. Refer to Section 7 in the event it is necessary to return equipment to APC. CAUTION: Appropr
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Ventilation The rectifier modules for this system have fans that provide front-to-rear airflow for internal cooling. The MX28B housing should mounted such that there is free airflow to the front, top, and bottom of the unit. [Refer to Section 6.6 for environmental characteristics.] Free airflow should be ensured so that the power system can provide full power at a given ambient temperature rating without de-rating. 3.3. AC Power Connections WARNING: Ensure that all of the extern
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WARNING: The MX28B DC power plant is supplied from a nominal 220VAC, 60 Hz source. Keep the AC input enclosure in place when the system is operational or energized. 3.4. Battery Connections WARNING: Hazardous energy levels are present on bare conductors in the -48VDC distribution connection area of the plant. Accidental shorting of distribution conductors can cause arcing and high currents that can cause serious burns or other physical harm. It is recommended that: • Any jewe
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Figure 3.4-1 Battery Cable Connection Locations Battery Temperature Probe Installation The optional temperature probe is used to monitor the battery string temperature. To get the most representative temperature measurement, the probe should be placed in contact with a battery cell that is centrally located. The probe should be placed directly in contact with the cell (not the frame surrounding the cell). Generally, the cell cover can be used; be careful not to allow the probe b
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3.6. DC Power Output Over-Current Protection DC Circuit Breakers A standard 24-position plug-in circuit breaker tier provides -48V distribution. Various circuit breaker sizes from 1 to 100 amps are available, with 60-100 amp breakers requiring two positions and a circuit breaker adapter kit. The breaker tier is connected at its center to the -48V DC bus, and each side has an ampacity of 300A. It is therefore necessary to balance the load on the MX28B-400 plant to avoid overloading t
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Plug-in Circuit Breakers BREAKER PART NUMBER BREAKER PART NUMBER RATING RATING 1 A FFA-0014 40 A FFA-0020 3 A FFA-0015 50 A FFA-0025 5 A FFA-0016 60 A 530-9088 10 A FFA-0017 70 A 530-9089 15 A 530-9093 80 A 530-9090 20 A FFA-0018 100 A 530-9091 30 A FFA-0019 Plug-in circuit breakers rated at 60A or more require two mounting positions and require a circuit breaker adapter, which is included in the circuit breaker kit. Adaptors are available with studs for #10-32 nuts on 5
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DC GMT Fuses Eight GMT fused outputs are also available as an option. This option uses one of the 24 available circuit breaker positions. Connections to the GMT fuses are made at terminal block connectors labeled “F1” through “F8” that are located on the interface card mounted in the top left side of the unit. See Figure 2.1-1 for details. A list of GMT type fuses available from APC is provided below. GMT Fuses FUSE RATING PART NUMBER ¼ A FFA-0030 ½ A FFA-0031 3/4 A FFA-0032
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3.7. Installation of Circuit Breakers and Fuses Plug-in Circuit Breaker Installation CAUTION During circuit breaker installation, carefully align the breaker alarm terminals with the alarm terminal board to avoid breaker terminal damage. 1) Remove the circuit breaker cover panel and the plastic cover(s) from the desired location(s). 2) Install the circuit breaker(s) by snapping the top terminal onto the upper bus bar and rotating the unit down until the second terminal snaps on
