ABB ACS800-04, Hardware Manual

Page: 40 / 118

Planning the electrical installation
40
Supply connection
Disconnecting device (disconnecting means)
ACS800-01, ACS800-U1, ACS800-11, ACS800-U11, ACS800-31, ACS800-U31,
ACS800-02 and ACS800-U2 without enclosure extension, ACS800-04, ACS800-U4
Install a hand-operated input disconnecting device (disconnecting means) between
the AC power source and the drive. The disconnecting device must be of a type that
can be locked to the open position for installation and maintenance work.
ACS800-02 and ACS800-U2 with enclosure extension, ACS800-07 and ACS800-U7
These units are equipped with a hand-operated input disconnecting device
(disconnecting means) which isolates the drive and the motor from the AC power as
standard. The disconnecting device does not, however, isolate the input busbars
from the AC power. Therefore, during installation and maintenance work on the
drive, the input cables and busbars must be isolated from the input power with a
disconnector at the distribution board or at the supplying transformer.
EU
To meet the European Union Directives, according to standard EN 60204-1, Safety
of Machinery, the disconnecting device must be one of the following types:
• switch-disconnector of utilization category AC-23B (EN 60947-3)
• disconnector that has an auxiliary contact that in all cases causes switching
devices to break the load circuit before the opening of the main contacts of the
disconnector (EN 60947-3)
• circuit breaker suitable for isolation in accordance with EN 60947-2.
US
The disconnecting means must conform to the applicable safety regulations.
Fuses
See section Thermal overload and short-circuit protection .
Main contactor
If used, dimension the contactor according to the nominal voltage and current of the
drive. The utilization category (IEC 947-4) is AC-1.