Busbars; Fuses; General Wiring Diagram - WEG CFW11W G2 Series User Manual

NOTE!
The harmonics shown in
Harmonics of the 12-Pulse Rectifier on page 3-17
on page 3-18 are typical values and may vary according to the application. The data shown are
valid for the following condition:
Short circuit current of the transformer: 100000 symmetric Arms
„
Line reactance of 3 %.
„

3.2.2 Busbars

The panel busbars must be sized according to the rectifier output current and the drive output current. It is
recommended to use copper busbars. In case it is necessary to use aluminum busbars, it is necessary to clean
the contacts and use anti-oxidant compound. If the compound is not used, any copper and aluminum joint will
undergo accelerated corrosion.

3.2.3 Fuses

It is recommended to use proper fuses for operation in direct current on the DC power supply of the UP11W G2.
The maximum voltage on the DC link on the UP11W-01 G2 is 1200 Vdc (tripping level of the IGBTs for overvoltage).
Fuses used in AC lines can be used, but the specified AC voltage must be derated. To obtain the derating factor,
refer to the fuse manufacturer.
Fuse examples:
UP11W-01 G2: PC73UD12C900TF (Mersen).
„

3.2.4 General Wiring Diagram

Figure 3.24 on page 3-20
the connections between the Control Unit UC11 and the PUs (Connectors DB25 XC40 and Fiber Optics), power
connections of the PUs (DC+, DC-, U, V, W and GND), and auxiliary power supply connections of the UP11W G2
(24 Vdc) and UC11 G2 (24 Vdc). For a reduced number of UP11W G2, connect them in increasing order (1, 2, 3,
etc.), leaving the last positions without connection.
Item 3.2.1.4 Harmonics of the 6-Pulse Rectifier on page
shows the general diagram for an inverter with five Power Units (UP11W G2). It shows
Installation and Connection
and Item 3.2.1.6 Harmonics of the 18-Pulse Rectifier
3-16, Item 3.2.1.5
3
CFW-11W G2 | 3-19