Motor Connection; Connection Of Braking Resistor(S) - Lenze 7812 Technical Description

checked:
ET4 6/fa
5.14 Motor corYnection
screened
‚~
motor cable
three-phase
(*) Valid tor industrial plants and factories which must have
levels ot radio interference suppression in compliance with
VDE 0871. lt necessary, please consult the supplier.
5.15 Connection of braking resistor(s
brake
resistor
19.04.89
Ihe nominal
—
normally selected such that it
corresponds to the available
nominal
e.g. 380V motor at 380V mains
—
exceeds the nominal motor
voltage,
characteristic can be pro—
motor 3
—
—
—
—
*
MB 33.0831 GB
motor voltage
mains voltage
460V motor at 460V mains
lt the nominal mains voltage
the inverte.r's
grammed as described urider
turietion code 10.
Switching of the phases is only
permissible with the circuit as
described under polnt 5.13.
Application: Short braking times
with large masses.
The energy produced in the „gene-
rator rnode" is fed into the
DC link circuit ot the Inverter
and results in an iricrease of the
DC link voltage and current, when
operating without a braking chopper.
The inverter sets TRIP.
Fault indication: OC 2 or OU.
Using a braking resistor
vating the internal
(See tiinctlon
excessive energy to be dlssipated
as heat.
The ~?D(~cifiedbrake resistor~ ~re
1.sted in the table on page 21.
?or settir. ot the release
current
see table an page 21).
page:
is
output
or acti—
braking chopper
code
23) causes the
II