General
Information
The
function of
the DBU
braking unit
is to divert
into a
braking
resistor the
regenerative
energy
produced in
the process
of
decelerating
the motor,
converting
that energy
into heat.
Regenerative
energy flows
from the
motor into
the inverter
DC Bus,
manifested
as increased
bus voltage.
The
advantage
gained using
the DBU is
improved
braking
performance
and shorter
deceleration
time of the
load.
Before you
use the DBU
braking
unit, please
read through
this manual
and please
contact your
distributor
if you have
any
questions.
This manual
will provide
you the
necessary
information
for
installation,
operation,
troubleshooting
and repair
of the DBU
braking
unit.
A.
Inspection
Please check
that the
model number
is the same
as what you
ordered
BEFORE
opening the
box. Then,
check the
contents for
any sign of
defect or
damage
during
transport.
If there is
any problem,
please
contact your
Hitachi
distributor
immediately.
B.
Braking Unit
model
numbering
convention
