ABB ACS880-07CLC, Hardware Manual

Page: 27 / 214

￭ Overview diagrams
This section contains examples of main circuit overview diagrams. The diagrams show the
power line connection, and the connections between the parts of the drive.
Overview diagram of the drive
M
3~
8
7
6
5
10
9
11
3
1
2
4
AC supply. See detailed diagrams below. 1
AC fuses. Installed at the input of each supply module. 2
Supply modules. Depending on drive type, there is only one module, or several modules connected in
parallel. 3
Charging circuit. The drive must be fitted with a charging circuit so that the DC capacitors of the drive are
smoothly charged at power-up. See section
Charging (page 26) .
4
DC bus 5
Inverter DC fuses 6
Inverter modules. Converts direct current and voltage to alternating current and voltage. Depending on
drive type, there is only one module, or several modules connected in parallel. 7
Motor 8
*Brake chopper DC fuses 9
**Brake chopper. Conducts surplus energy from the intermediate DC circuit of the drive to the brake
resistor when necessary. The chopper operates when the DC voltage exceeds a certain maximum limit.The
voltage rise is typically caused by deceleration (braking) of a high inertia motor. 10
**Brake resistors 11
*Brake chopper (+D150) and resistors (+D151) are optionally available for certain drive types. See chapter
Resistor braking (page 203) .
Operation principle and hardware description 27