ABB ACS880-07CLC, Hardware Manual

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Operation principle and hardware
description
Contents of this chapter
This chapter briefly describes the operation principle and construction of the drive.
Operation principle
The ACS880-07CLC is a liquid-cooled cabinet-installed drive for controlling asynchronous
AC induction motors, permanent magnet synchronous motors and AC induction servomotors.
The drive consists of several cubicles that contain the supply and motor terminals, 1 to 8
diode supply module(s), 1 to 8 inverter modules, and optional equipment. The actual
arrangement of the cubicles varies from type to type and the selected options.
The diode supply unit of the drive is uncontrolled: it cannot control the DC link voltage or
limit the charging current of the DC link capacitors at the power-up.
Notes:
• The installer must provide an external main disconnecting device which meets the local
safety regulations.
• The installer must provide an external main contactor or breaker as the drive does not
have an internal main contactor or breaker.
• The installer must either provide an external charging circuit, or specify F272
for a built-in charging circuit. The external charging circuit can be eg. combined into
one unit that also magnetizes the supply transformer.
• The supply unit of the drive does not have the means to control, limit or cut off the load
current.
• The installer must arrange for overload and short-circuit protection of the supply cable,
typically with fuses.
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