Operator`s manual

Rev. 1/99 Vicor 800-735-6200 Westcor Division 408-522-5280 Applications Engineering 978-749-3524 or -3525 Pg. 5
3 Phase MegaPAC™
AC-DC Switcher
Overview
The 3 Phase MegaPAC is a field-configurable, single or multiple output switcher, providing up to 2000W of output
power and up to 20 regulated, fully isolated outputs. It achieves power density of 4.6 watts per cubic inch. A mod-
ular package design allows the user to instantly configure efficient, off-line power supplies. This is accomplished
by inserting up to 10 ConverterPAC output assemblies into a 3-Phase-front-end chassis. Output slots can be filled
with airblocks in anticipation of future power requirements.
A complete power supply is configured by selecting and inserting up to ten slide-in output assemblies called
“ConverterPACs.” ConverterPACs incorporate one or two Vicor DC-DC converters and are available in a wide
array of outputs and power levels. The net result is a power supply that offers the advantages of a custom supply,
but assembled from standard and modular building blocks.
The entire family of MegaPAC power supplies is completely user-configurable. If output requirements change, i.e.,
more power, or a different output voltage is needed, upgrading is easy: simply unlock a single screw and replace
the slide-in ModuPAC assembly with one that has the desired rating. For additional flexibility, ModuPACs can be
connected in parallel to increase output power (booster ModuPACs), or in series for higher voltages. The driver is
to the left of the boosters when looking at the output end of the supply. A user-friendly interface provides control
and output sequencing capability, in addition to useful status indicators. Please consult our Applications
Engineering Department if you have other special requirements.
Standard Features
• Input: 3∅ 208/240 Vac Wye or Delta, or 260-380Vdc
• Power Output: 2000W with 3∅ input; 1200W with 1∅ input; 1-20 outputs
• Full power to 45°C; half power to 65°C
• Active soft-start circuit limits inrush current to 25A peak
• Power factor correction to 0.92 PF (3∅ input)
• Conducted EMI meets FCC/VDE "A" specifications
• AC Power OK and AC Power Fail status signals
• Output Sequencing and General Shutdown (Consult Applications Engineering for automatic
sequencing circuitry.)
• Inlet air temperature monitor with overtemperature warning and shutdown
• Remote Sense capability
• Overcurrent protection on all outputs
• Overtemperature and output overvoltage protection (except when using VI-J00)
• Ride-Through (Holdup) time: >20 ms at full load
• Size: 4.9"H x 7.5"W x 15.2"L (124,5mm x 190,5mm x 386,1mm) Extended chassis
Size: 4.9"H x 7.5"W x 12.3"L (124,5mm x 190,5mm x 312,4mm) Regular chassis
Optional Features
• DC OK status signal
• Output voltage adjustment range with built-in potentiometer
• Reversed fan airflow direction
• Industrial-grade screening of output converters
• Hardwired Local Sense
3 Phase MegaPAC Owner’s Manual