Rockwell Automation Publication 20Y-TG001C-EN-P - April 2017
19
Chapter
2
Active Front End System Overview
This chapter describes AFE system main components. The chapter groups
components that are used in an IP20 2500 MCC Style enclosure, an
IP21Rittal enclosure, and main components for the AFE IP00 open chassis
configuration.
AFE in IP20 2500 MCC Style
Enclosure
Main Component Sections
shows a one-line diagram for an AFE system in an IP20 2500 MCC
Style enclosure. The main component sections consist of the following items:
• AC line switchgear consisting of the input circuit breaker (Q0), fuses
(F1.1…F1.3), and input contactor (K1)
• LCL filter (L1)
• Precharge circuit
• AFE power structure (U1) with AFE control assembly
• DC fuses (F2.1 and F2.2)
Figure 1 - Basic One-line Diagram for an AFE Frame 10 in IP20 2500 MCC Style Enclosure
DC Bus
Output
L1
3 Phase
AC Input
L2
L3
PowerFlex
Active Front End System
Precharge
Circuit
R6.1
R6.2
+
-
AC Line Switchgear
LCL Filter (L1)
AFE
Power Structure (U1)
DC
Fuses
U2
V2
W2
C1
C2
C3
C4
C5
C6
U1
U1
V1
W1
U
DC+
DC-
V
F2.1
F2.2
W
PE
PE
Input
Contactor
K1
Fuses
F1.1-F1.3
Input
Breaker
Q0
Precharge
Contactor
Precharge
Fuses
F5
K6
Factory-installed Common
Mode Core