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PRODUCT MANUAL
MX28B-PDF
POWER DISTRIBUTION FRAME
APC DC Network Solutions Inc.
11035 Switzer Avenue
Dallas, TX 75238
800-800-4APC
PART NUMBER 990-9132
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MX28B-PDF Product Manual Revision A REVISION HISTORY Revision Date By Description A 26 Jan 2001 JNF Initial release 2 APC
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Revision A MX28B-PDF Product Manual TABLE OF CONTENTS 1. GENERAL INFORMATION............................................................................................................. 4 1.1 Introduction.............................................................................................................................. 4 1.2 Precautions.............................................................................................................................. 4 1.3 Inspectio
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MX28B-PDF Product Manual Revision A 1. GENERAL INFORMATION 1.1. INTRODUCTION The MX28B Power Distribution Frames (PDF) from APC DC Network Solutions Inc. possesses unique features that make them easy to install, maintain and upgrade. Sales support for purchases, proposals, after-sales support, etc. is provided by APC DC Network Solutions Inc. sales and service offices. APC DC Network Solutions Inc. provides nationwide 24 hour, 7 day service response by dialing: (800) 800- 4APC
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Revision A MX28B-PDF Product Manual Please be sure that all items are accounted for, including the number of pallets and the quantity of accessory and/or component boxes. Also note any visible external damage that may have occurred during transit. If damage has occurred, or the quantity of items is not correct: •= Make a descriptive notation on the delivery receipt before signing. •= File a damage report with the carrier that delivered the shipment. 1.3.3 Concealed Damage Within
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MX28B-PDF Product Manual Revision A 2. SYSTEM OVERVIEW AND TECHNICAL DESCRIPTION 2.1 GENERAL SYSTEM OVERVIEW The Power Distribution Frame (PDF) provides for distribution of –48 VDC power through circuit breakers. The PDF consists of a rack with three power distribution cabinets. Each cabinet can hold up to 48 circuit breakers on two separate tiers for a total of 144 breakers. 2.2 SYSTEM SPECIFICATIONS The system is available in six configurations: Part Number Tier Locations B
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Revision A MX28B-PDF Product Manual 2.2.1 Input –48 VDC Bus All six busses can be isolated, or tied together with splice plates depending on customer desires. Splice Plates Installed Without Splice Plates Figure 2-2 Bus Bars 2.2.2 Circuit Breaker Tiers Each circuit breaker tier provides positions for mounting 24 plug-in circuit breakers. Each tier bus is connected to the –48 VDC input bus with each side having an ampacity of 600 amperes. 2.2.3 Circuit Breaker
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MX28B-PDF Product Manual Revision A BREAKER PART NUMBER BREAKER PART NUMBER RATING RATING 1 A FFA-0014 20 A FFA-0018 3 A FFA-0015 30 A FFA-0019 5 A FFA-0016 40 A FFA-0020 10 A FFA-0017 50 A FFA-0025 15 A FFA-0028 Table2.1 Plug-in Circuit Breakers 60A 70A 80A 100A #10 stud FFA-0021-1 FFA-0022-1 FFA-0023-1 FFA-0024-1 5/8” centers #10 stud FFA-0021-2 FFA-0022-2 FFA-0023-2 FFA-0024-2 3/4” centers ¼” stud FFA-0021-3 FFA-0022-3 FFA-0023-3 FFA-
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Revision A MX28B-PDF Product Manual 2.3.2 Alarm Relay There is an alarm relay, K-1 located on the center of the meter panel that energizes if any circuit breaker trips within the PDF. Form C contacts from this relay are available via connector J-9 located at the center of the circuit board. If the PDF is being powered by an APC MX28B power system, these contacts can be monitored by connecting them to the “external Alarm Inputs” available in the controller J-9 K-1 Fi
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MX28B-PDF Product Manual Revision A 3. INSTALLATION PROCEDURES 3.1 PREPARATION 3.1.1 Recommended Tools Tools required for installation: •= Standard selection of customary insulated hand tools used by qualified technicians. •= An appropriate drill to drill holes in the floor to anchor the plant. •= A crimping device for compressing lugs not already crimped. 3.1.2 Recommended Test Equipment Test equipment required for installation: •= Digital Multimeter 3.1.3 Equipment
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Revision A MX28B-PDF Product Manual 3.1.6 Mounting The box frame housing is self-supporting, but designed to be bolted to the floor of the housing structure. The figure below shows the footprint of the box frame and the mounting points with dimensions (shown in inches). Consult the system design specifications to see if it is necessary to electrically isolate the frame from the floor structure. This is required in many installations. Insulator kit, part number AAB-0597 is available i
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MX28B-PDF Product Manual Revision A +48V Bus -48V Bus without splice plate -48V Bus Splice plate With splice plates without splice plates Figure 3-2 Bus Bars 3.4 CIRCUIT BREAKER INSTALLATION Use diagonal cutters to cut the metal web of the breaker panel “knock-outs” at the desired breaker locations. Note: Plug-in Breakers (60 A – 100A) require two mounting positions and a breaker adapter kit. The breakers are installed by snapping the top terminal onto the upper
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Revision A MX28B-PDF Product Manual Knock-outs Figure 3-3: Installation of Circuit Breakers 3.5 LOAD CONNECTIONS Connection for –48VDC loads are made from standard size #10-32 two-hole lugs on 5/8” centers located directly next to the corresponding circuit breaker. The load returns connect to the –48VDC load return bus located behind each row of circuit breakers. The load return bus provides threaded holes for terminating 2-hole lugs. The return bus has provisions for 25 #10
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MX28B-PDF Product Manual Revision A 4. CUSTOMER SERVICE AND SUPPORT APC DC Network Solutions Inc. manufactures the MX28B line of Power Plants and provides customers with complete product and systems support and service. APC DC Network Solutions Inc. has a network of factory trained service technicians. The service organization is on call 24 hours a day, 365 days a year. If you experience a problem with your APC power system that requires our attention, contact APC DC Network Solut
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Revision A MX28B-PDF Product Manual 5.3 WARRANTY REPAIR OR REPLACEMENT If, during the warranty period, the supplied equipment is physically or electrically unsound due to defective materials or workmanship on the part of APC DC Network Solutions Inc., the defective product or component(s) will be repaired or replaced at the sole option of APC DC Network Solutions Inc. without charge to the purchaser (user) for replacement materials or factory repair labor. The procedures outlined abov
