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

Figure 3.11 - (a) and (b) - Ground connections - location and procedure for adapting to IT or corner-ground networks
Remove
(a) Initial position
Figure 3.12 - Grounding connections – location and procedure to adapt to the IT or delta-grounded networks – frame size H

3.2.3.1.3 Command Fuses of Pre-charge Circuit

Specifications of the used auxiliary fuse:
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, G and H models do not have internal braking IGBT. When necessary, braking modules
and external resistors should be installed, as shown in
NOTE!
Set P0151 and P0185 to the maximum value (800 V) when using dynamic braking.
The braking torque that can be obtained using frequency inverters without dynamic braking varies between 10 %
to 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.
1
Remove
(a) Initial position
Connect
(b) Final position (IT)
Installation and Connection
2
Connect
(b) Final position (IT)
(c) Final position (IT)
Figure 3.13 on page 3-24.
Connect
CFW-11 | 3-23
3