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Rev 1 MX28B-1200+27V PRODUCT MANUAL
7
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 MRF28H27BV with specifications as follows:
• Input Voltage: 176-264V ac (230V ac nominal) @ 45-66 Hz
• Input Current per Rectifier: 13.9 Amps @ 230V ac
• Apparent Power Factor: 99% Typical, 98% Minimum
• Output Voltage: 27.2V DC
• Overvoltage Protection: Set at 31.5V DC
• Output Current per Rectifier: 100A Minimum Continuous
• Power Output per Rectifier: 2800W Continuous, Vin > 198V ac
• Efficiency: 89% Typical
• Cooling: Fan cooled, front to rear airflow
• Ambient Temperature: -25°C to 55°C Operational
4.4 Converters
APC Vector Series with specifications as follows:
• Input Voltage: +20V DC to +30V DC
• Input Current per converter: <30 amps
• Output Voltage: -50VDC (-48V DC to –52V DC)
• Output current per converter: 10 amps
• Power output per converter: 520 Watts
• Efficiency: >85%
• Cooling: Fan cooled, front to rear airflow
• Ambient temperature: -40°C to 55°C Operational