Ground Fault Protection; Emergency Stop Devices - ABB ACS800-U4 Hardware Manual

2) Circuit breakers which have been tested by ABB with the ACS800 can be used. Fuses must be used
with other circuit breakers. Contact your local ABB representative for approved breaker types and
supply network characteristics.
The protective characteristics of circuit breakers depend on the type, construction and settings of the
breakers. There are also limitations pertaining to the short-circuit capacity of the supply network.
Note: Circuit breakers must not be used without fuses in the USA.

Ground fault protection

The drive is equipped with an internal ground fault protective function to protect the
unit against ground faults in the motor and the motor cable. This is not a personal
safety or a fire protection feature. The ground fault protective function can be
disabled with a parameter, refer to the appropriate ACS800 Firmware Manual.
The EMC filter of the drive includes capacitors connected between the main circuit
and the frame. These capacitors and long motor cables increase the ground leakage
current and may cause fault current circuit breakers to function.

Emergency stop devices

For safety reasons, install the emergency stop devices at each operator control
station and at other operating stations where emergency stop may be needed.
Note: Pressing the stop key (
an emergency stop of the motor or separate the drive from dangerous potential.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
WARNING! Due to the inherent operating principle and construction of circuit breakers,
independent of the manufacturer, hot ionized gases may escape from the breaker
enclosure in case of a short-circuit. To ensure safe use, special attention must be paid to
the installation and placement of the breakers. Follow the manufacturer's instructions.
) on the control panel of the drive does not generate
Planning the electrical installation
49