9.9 Brake Resistors
In applications where the motor is used as a brake, energy
is generated in the motor and sent back into the
adjustable frequency drive. If the energy cannot be
transported back to the motor, it increases the voltage in
the drive DC line. In applications with frequent braking
and/or high inertia loads, this voltage increase may lead to
an overvoltage trip in the drive and possibly a shut down.
Brake resistors are used to dissipate the excess energy
from the regenerative braking. The resistor is selected in
respect to its ohmic value, its power dissipation rate, and
its physical size. Danfoss offers a wide variety of different
resistors that are specially designed to our adjustable
frequency drives. For the dimensioning of brake resistors,
see chapter 3.8.3 Selection of Brake Resistor . Code numbers
can be found in chapter 5 How to Order.
9.10 LCP Panel Mounting Kit
The LCP can be moved to the front of a cabinet by using
the remote built-in kit. The fastening screws must be
tightened with a torque of max. 1 Nm.
Enclosure IP66 front
Max. cable length between and unit 10 ft [3 m]
Communication std RS-485
Table 9.5 Technical Data for Mounting an LCP to the IP66
Enclosure
Figure 9.18 Dimensions
Figure 9.19 Ordering No. 130B1113, LCP Kit with Graphical
LCP, Fasteners, 10 ft [3 m] Cable and Gasket
Figure 9.20 Ordering No. 130B1114, LCP Kit with Numerical
LCP, Fasteners and Gasket
Also available is an LCP Kit without LCP. For IP66 units, the
ordering number is 130B1117. Use ordering number
130B1129 for IP55 units.
Options and Accessories Design Guide
MG34S222 Danfoss A/S © Rev. 2014-02-10 All rights reserved. 263
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