Main Circuit - ABB ACS880-01 Hardware Manual
0.55 to 250 kw,
0.75 to 350 hp
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Also See for ACS880-01:
- Hardware manual (302 pages) ,
- Installation manual (238 pages) ,
- Quick installation manual (108 pages)
Table of Contents
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28 Operation principle and hardware description
Main circuit
The main circuit of the drive is shown below.
ACS880-01
1
L1
L2
L3
1
Rectifier. Converts alternating current and voltage to direct current and voltage.
2
DC link. DC circuit between rectifier and inverter.
3
Inverter. Converts direct current and voltage to alternating current and voltage.
4
Brake chopper. Conducts the surplus energy from the intermediate DC circuit of the
drive to the brake resistor when necessary. The chopper operates when the DC link
voltage exceeds a certain maximum limit. The voltage rise is typically caused by
deceleration (braking) of a high inertia motor. User obtains and installs the brake
resistor when needed.
2
4
R- UDC+ UDC-
R+
3
T1/U
T2/V
T3/W
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