![Rockwell Automation Allen-Bradley PowerFlex 700AFE Hardware Service Manual Download Page 22](http://html.mh-extra.com/html/rockwell-automation/allen-bradley-powerflex-700afe/allen-bradley-powerflex-700afe_hardware-service-manual_1475495022.webp)
22
Rockwell Automation Publication 20Y-TG002C-EN-P - April 2017
Chapter 2
Active Front End System Overview
AFE in IP21 Rittal Enclosure
Main Component Sections
shows a basic one-line diagram for an AFE system in an IP21 Rittal
enclosure. The main component sections consist of the following items:
• AC line switchgear consisting of the input disconnect (Q0) and MCCB
motor-controlled circuit breaker (Q1)
• LCL filter (L1)
• Precharge circuit
• AFE power structure (U1) with AFE control assembly
• DC fuses (F2.1…F2.6)
Figure 4 - Basic One-line Diagram for AFE in IP21 Rittal 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
V1
W1
Q1
Q0
Precharge
Fuses
Precharge
Contactor
Motor Protection
Relay
Q5
K6
F6
F2.1
F2.2
F2.3
F2.4
F2.5
F2.6
DC+
DC-
W
PE
PE
DC+
DC-
V
PE
DC+
DC-
U
PE