Installation and Connection
3
CFW-11 | 3-39
The DC bus voltage level for the activation of the dynamic braking function is defined by parameter P0153
(dynamic braking level).
The power of the braking resistor is a function of the deceleration time, the load inertia, and the load torque.
For most applications, a braking resistor with the value in ohms indicated in Table 3.10 on page 3-40 and the
power of 20 % of the rated driven motor power. Use WIRE type resistors in a ceramic support with adequate
insulation voltage and capable of withstanding high instantaneous power with respect to rated power. For critical
applications with very short deceleration times and high inertia loads (eg.: centrifuges) or short duration cycles,
consult WEG for the adequate sizing of the braking resistor.
1 2 3
4 5 6
(a) Frame sizes F and G
1 2 3
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(b) Frame size H
Figure 3.31 - (a) and (b) - Sequence for the connection cables of DC+ and DC- for connection of an external braking
module to CFW-11 inverter for models of frame sizes F, G and H
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