English
INSTALLATION AND CONNECTION
A
B
C
D
E
Figure 3.13:
Grounding screws for filter capacitors and varistors
3.2.4.2 Dynamic Braking
✓
NOTE!
All models of frames A, B, C, D and E with fixed suffix DB have internal braking IGBT, which is available
in the standard version of frames A, B and C and as an optional item in frames D and E.
The braking torque that can be obtained from the frequency inverter without braking resistors varies from 10 % to
35% of the motor rated torque.
Braking resistors shall be used to obtain higher braking torques. In this case, the energy regenerated in excessis
dissipated in a resistor mounted externally to the inverter.
This type of braking is used in cases where short deceleration times are desired or when high inertia loads are
driven.
The “Optimal Braking” feature may be used with the vector control mode, which eliminates in most cases the need
of an external braking resistor.
CFW900 | 31
