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MegaPAC Dos and Don’ts
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For units without Autosense,
do not leave ConverterPAC™ SENSE lines open. Always terminate
them at their respective outputs locally or at the load. Use twisted pair 22 – 24AWG wire. If
ConverterPAC has Autosense, no local-sense connection is required.
See Pages 13 and 17 for
more information on Autosense.
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If needed, use Connector Kit #19-130041 for the 3-Phase / 4kW MegaPACs.
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Always fill all output slots of the MegaPAC™. If a slot is not filled with a ConverterPAC, it
should be filled with an airblock.
Airblocks are plastic assemblies whose main function is to fill up
an empty slot. Any airflow escape from an empty slot, significantly degrade thermal performance
can
result in overheating and damage to the power supply.
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Do not unplug ConverterPACs while input power is applied. They are not designed for
hot-plug applications.
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Do not restrict air flow to the unit. Leave a two-inch minimum space in front and behind the
supply.
The cooling fan draws air into the unit and forces it out at the output power terminals.
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For power expansion, use booster ConverterPACs. Viewing the unit from the output terminal side,
always insert boosters to the right side of the driver.
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Do not use boosters as independent outputs. Disconnecting bus bars will damage
booster ConverterPACs.
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Always ensure that output hex-nuts are properly torqued before applying power to supply.
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For booster arrays,
do not remove bus bars.
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Run the output (+/–) power cables next to each other to minimize inductance.
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Wait five minutes after shutting off power before inserting or removing ConverterPACs.
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The MegaPACs does not have user-serviceable components. They must be returned to the factory
for repairs. Contact Customer Service for a RMA number before returning the unit. Do not attempt
to repair or modify the power supply in any manner other than the exchange of ConverterPACs as
described in this user guide.
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Insert proper fault protection at power supply input terminals (i.e., a fuse).
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Use proper-size wires to avoid overheating and excessive voltage drop.
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Never loosen the inner nut on a ConverterPAC.
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Verify output nuts are tight before powering up.
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Only use the regular-length ConverterPACs in the 3-Phase / 4kW MegaPAC chassis. You cannot use
any of the extended-length ConverterPACs which are only used in the EL (low-noise) products.
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Keep in mind that currently, the UniPAC™ ConverterPAC can only be used in the 4kW MegaPAC.
