Pre-Charge Circuit Fuses; Dynamic Braking - WEG CFW-11 Series User Manual

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Remove

3.2.3.1.2 Pre-charge Circuit Fuses

4 A / 690 V slow blow fuse.
Manufacturer: Ferraz Shawmut.
Commercial reference: 17019-G.
WEG part number: 10411503.

3.2.3.2 Dynamic Braking

ATTENTION!
Frame sizes F and G CFW-11 models do not have internal braking IGBT. External braking modules
and resistors must be installed when necessary, as showed in the figure 3.8 (a).
NOTE!
Set P0151 and P0185 to the maximum value (400 V or 800 V) when using dynamic braking.
The braking torque that can be obtained using frequency inverters without dynamic braking varies between 10 %
and 35 % of the motor rated torque.
In order to obtain higher braking torques, resistors for dynamic braking must be used. In this case, the energy
regenerated in excess is dissipated on a resistor mounted outside the inverter.
This type of braking is used in cases when short deceleration times are desired or when high inertia loads are
driven.
For the vector control mode, there is the possibility of using the "Optimal Braking", eliminating in many cases
the need of dynamic braking use.
Figure 3.9 - Connection for IT network operation
Installation and Connection
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