Active Front End (AFE)
vacon • 43
24-hour s358 (0)201 212 575 • Email: [email protected]
4
4.15.2
Each Active Front End unit has the pre-charging circuit
Each Active Front End can have its own pre-charging circuit. Each unit controls its own pre-charging
and main contactor. See Figure 22. One control switch can be used, but if an Active Front End unit
needs to be controlled independently, separate switches are needed. With this the system is more
redundant than with a common pre-charging circuit. The circuit diagram for control, see Appendix
70 and Appendix 72.
Figure 22. Active Front End units parallel connection with own pre-charging circuits
PE
+LCL-U1
+LCL-U2
11166.emf
+AFE-U1
NXA xxxx x
+AFE-U2
NXA xxxx x
DC+
DC-
Main Circuit
Do
ub
le
Insul
a
te
d
Do
ub
le
In
su
la
te
d
Do
ub
le
Insul
a
te
d
Do
ub
le I
n
su
late
d
Derating as a function
of ambient tempera-
ture
Ambient temperature, °C
Loadability, %
Содержание NX Active Front End
Страница 1: ...vacon nx ac drives active front end unit afe user manual ...
Страница 2: ......
Страница 96: ...7 vacon 94 Appendices Tel 358 0 201 2121 Fax 358 0 201 212 205 Figure 71 Wiring diagram for FI13 11226 pdf ...
Страница 109: ......