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DC POWER PLANT
PRODUCT MANUAL
MODEL MX28B1200/2400+27V
APC DC Network Solutions Inc.
11035 Switzer Avenue
Dallas, TX 75238 Part Number 990-9166
800-800-4APC Preliminary release
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MX28B-1200+27V PRODUCT MANUAL Rev 1 Product Structure Description Part Number Component 1200 amp frame, 2400 amp carry through, controller. No rectifiers, converters, no MX28B1200/2400+27V Main Bay 0M-91147 distribution 1200 Amp expansion frame, No rectifiers, MX28B1200/2400+27V Main Bay Available soon distribution. Main and/or extension Bay DC Distribution Options +24V 38 +27V breakers and 8 –48V volt Small Breakers 0M-91145 breakers Main and/or extension Bay LVD Options
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Rev 1 MX28B-1200+27V PRODUCT MANUAL REVISION HISTORY Revision Date By Description 1 09/12/2001 JNF Initial release. iii
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MX28B-1200+27V PRODUCT MANUAL Rev 1 TABLE OF CONTENTS 1 GENERAL INFORMATION ...........................................................................................................1 1.1 INTRODUCTION.................................................................................................................................................................1 1.2 PRECAUTIONS..................................................................................................................
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 5.8 CONNECTING THE LOADS............................................................................................................................................. 20 5.8.1 DC Circuit Breakers...........................................................................................................................................20 5.8.2 Installation of Circuit Breakers.......................................................................................
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 1 GENERAL INFORMATION 1.1 Introduction 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.
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MX28B-1200+27V PRODUCT MANUAL Rev 1 1.3.3 Concealed Damage It is the customer’s responsibility to unpack the power system and equipment received from APC and check for concealed damage. Within 15 days of receipt, check the materials received against the detailed packing list to verify that the quantity and condition are complete and satisfactory. Again, note any damage to the internal packing material and/or material shortages. If damage or shortage is noted, then: 1) Request an ins
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 2 CUSTOMER SERVICE AND SUPPORT APC manufactures a line power plants and provides customers with complete product and systems support and service. APC has an international network of factory trained service technicians. The service organization is on call 24 hours a day, 365 days a year. If there is a problem with the power system, contact APC at (800) 800-4APC Units returned for repair can be turned around within 24 to 48 hours of receipt at the facto
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MX28B-1200+27V PRODUCT MANUAL Rev 1 3.2 Exclusions and Limitations 1. This warranty applies only to the original US domestic purchaser (user) and is not transferable internationally, except with expressed written consent from APC facility in Dallas, Texas. 2. APC reserves the right to void the warranty if identification marks or serial numbers have been removed or tampered with, or the defect is determined to have been caused by misuse, neglect, improper installation, environmental conditi
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 4 PRODUCT OVERVIEW AND TECHNICAL DESCRIPTION 4.1 Description The APC Models MX28B1200+27V represents a family of stand-alone +24V DC power plants. Through the use of modular power, a system is configurable in such a manner that it will support most typical applications within the specified current range of up to 1200 amps without special application engineering or assistance. The expansion bay, which will increase the output to 2400 Amps, will be avail
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MX28B-1200+27V PRODUCT MANUAL Rev 1 +24V RECTIFIERS USER INFRASTRUCTURE -48V LOADS UTILITY AC -48V BUS -48V DC/DC CONVERTERS +24V BUS +24V LOADS BATTERY DISCONNECT LVD BATTERY (OPTIONAL) PLANT MASTER CONTROLLER WEB/SNMP USER RETURN BUS INTERFACE INPUT/OUTPUT BATTERY SHUNT MAIN GND MX28B-1200 +27 BUS Figure 4-2 MX28B1200/2400+27V System Diagram 6
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 4.2 Power Output Capacity A power frame consists of three rectifier shelves, each shelf accommodating up to four hot-plug, 100 amp rectifiers. A completely configured power frame with 12 rectifiers is rated at 1200 amps. The master control unit provides control and monitoring for the entire system. The optional converter shelf supports up to eight hot-plug +24/-48V DC/DC converters. Each converter is rated at 10 Amps. 4.3 Rectifiers APC Model MRF28H27
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MX28B-1200+27V PRODUCT MANUAL Rev 1 4.5 Control Unit The microprocessor-based power system control unit is 1U high (1.75”) and provides control and monitoring functions. Features implemented are: • 32-character alphanumeric display (2 lines by 16 characters) • LED alarm and status indicators • Standard voltage and battery charging control • Battery temperature compensation (optional temperature probe) • Monitoring of up to 6 shelves of four rectifiers each and up to 8 DC to DC Converter
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 4.7 Battery connections Battery connections are made at the top rear of the unit. The +24V and Battery Return buses each provide two sets of 3/8”-16 holes on 1 inch or 1 ¾ inch centers for connecting two-hole battery cable lugs. Refer to Figure 4-4. A battery disconnect breaker is required external to this equipment. The power plant can monitor auxiliary contacts from this breaker. Battery temperature compensation is available. APC’s master co
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MX28B-1200+27V PRODUCT MANUAL Rev 1 +24V load supply Load Return Bus. Thirty-eight +24V Breakers Seven -48V Breakers For DC to DC converters Figure 4.5 DC Distribution. 4.9 –48 V DC Distribution from Converters (Optional) Up to eight 24V/-48V dc converters can be used to supply power for –48V loads in increments of 10 Amps each. These converters are mounted at to bottom of the unit. Each converter is powered via a circuit breaker located directly below.
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 4.10 Environmental • Ambient Temperature: -4°F to 149°F (-20°C to +65°C) operating -40°F to 185°F (-40°C to +85°C) storage • Humidity: 0% to 85% RH non-condensing operating 0% to 95% RH non-condensing storage • Altitude: Up to10,000 feet (3000m) operating Up to 33,000 feet (10,000m) storage 4.11 Mechanical • Weight: Power Frame – 550 to 600 lbs. (250 to 272 kg) Rectifier - 11 lbs. (5 kg.) Converters – 7.2 lbs. (3.3 kg.) • Dimensions Fr
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MX28B-1200+27V PRODUCT MANUAL Rev 1 5 INSTALLATION PROCEDURES 5.1 Preparation 5.1.1 Recommended Tools • Standard selection of insulated hand tools. • Proper tools for crimping the selected cable lugs. 5.1.2 Recommended Test Equipment • Digital Multimeter 5.1.3 Equipment Inspection Remove equipment from packing material and inspect for shipping damage to verify the safety and operational suitability for the installation site. [Refer to Section 1.3] 5.1.4 Safety Precautions ***** WA
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Rev 1 MX28B-1200+27V PRODUCT MANUAL 5.1.5 Room/Locations NOTE: The APC Model MX28B1200/2400+27V DC power plant is to be installed in a room, vault, or similar enclosure that is accessible only to qualified persons in accordance with the NEC or the authority having jurisdiction. Prior to installation, drawings, floor loading requirements, external alarm points, AC service entrance, and grounding schemes should all be checked and confirmed. If batteries are to be mounted in a room separate
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MX28B-1200+27V PRODUCT MANUAL Rev 1 5.1.7 Ventilation The rectifiers have fans that provide front to rear airflow for internal cooling. The MX28B1200 housing should mounted to allow free airflow from the front and out the top of the unit. [Refer to Section 4.10 for environmental characteristics.] 5.2 AC Service and Ground Connections ***** WARNING ***** Ensure that all of the DC and external AC circuit breakers are in the OFF position prior to connecting service to the power plan
