Ground Fault Protection; Emergency Stop Devices; Acs800-02/U2 With Enclosure Extension And Acs800-07/U7; Restarting After An Emergency Stop - ABB ACS800-04 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 the 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.
3) Size the fuses according to local safety regulations, appropriate input voltage and the rated current of
the drive (see chapter Technical data).
4) ACS800-02 units and ACS800-07 units with enclosure extension are equipped with aR fuses as
standard. ACS800-U2 and ACS800-U7 units are equipped with T/L fuses as standard. The fuses
restrict drive damage and prevent damage to adjoining equipment in case of a short-circuit inside the
drive.

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 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.

ACS800-02/U2 with enclosure extension and ACS800-07/U7

An emergency stop function is optionally available for stopping and switching off the
whole drive. Two stop categories according to IEC/EN 60204-1 (1997) are available:
immediate removal of power (Category 0 for ACS800-02/U2 and ACS800-07/U7)
and controlled emergency stop (Category 1 for ACS800-07/U7).

Restarting after an emergency stop

After an emergency stop, the emergency stop button must be released and the drive
started by turning the operating switch of the drive from position "ON" to "START".
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
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