ABB ACS880-607LC, Hardware Manual, Page: 16 / 108

Overview diagram of the drive system
This diagram shows a multidrive system with a brake unit.
M M
1
2
3
5
4
6
6
12
7
8
10
9 11
5 5 5
AC supply 1
Input (AC) fuses 2
Supply unit 3
DC bus 4
Supply and inverter DC fuses (with or without a DC switch/disconnector) 5
Inverter units (in this example, one of the two units consists of two inverter modules connected in parallel) 6
Brake chopper fuses 7
Brake unit 8
Brake resistor (user-defined) 9
Brake resistor fuses 10
Motor(s) 11
DC switch/disconnector (part of F286) 12
The supply unit connects to the AC supply network. The supply unit converts the AC voltage
into DC. The DC voltage is distributed through the DC bus to all inverter and brake units.
The inverter unit, consisting of one or more inverter modules, converts the DC back to AC
that rotates the motor. The brake unit, consisting of one or more brake chopper modules,
conveys energy to brake resistors whenever needed.
16 Operation principle and hardware description