Rockwell Automation DC3R Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC User Manual
Page 16

8
Installation
Input isolation transformers might be needed to help eliminate the
following:
·
Damaging line voltage transients from reaching the drive.
·
Line noise from the drive back to the incoming power source.
·
Damaging currents that could develop if a point inside the drive
becomes grounded.
Observe the following guidelines when installing an isolation transformer:
·
A power disconnecting device must be installed between the power line
and primary of the transformer.
·
If the power disconnecting device is a circuit breaker, the circuit breaker
trip rating must be coordinated with the in-rush current (10-12 times full
load current) of the transformer.
Optional isolation transformer
ATTENTION:
Distribution system capacity above the maximum
recommended system KVA requires the use of an isolation transformer,
a line reactor, or other means of adding similar impedance to the drive
power input. Failure to observe these precautions could result in
damage to, or destruction of, the equipment.
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