Ground Fault Protection; Emergency Stop Devices; Restarting After An Emergency Stop - ABB ACS800 Hardware Manual

Ground fault protection

The inverter unit is equipped with an internal ground fault protective function to
protect the drive against ground faults in the drive, motor and motor cable (This is
not a personal safety or a fire protection feature). The ground fault protective
function can be disabled; refer to the Firmware Manual of the drive application
program.
See the ACS800 Ordering Information (3AFY64556568 [English], available on
request) for other available ground fault protection options.
The EMC filter (if present) 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.
Pressing the stop key (
switch of the drive from position "1" to "0" does not generate an emergency stop of
the motor or separate the drive from dangerous potential.
An emergency stop function is optionally available for stopping and switching off the
whole drive. Two modes are available: immediate removal of power (Category 0)
and controlled emergency stop (Category 1).
Note: If you add or modify the wiring in the drive safety circuits, ensure that the
appropriate standards (eg, IEC 61800-5-1, EN 62061, EN/ISO 13849-1 and -2) and
the ABB guidelines are met.

Restarting after an emergency stop

After an emergency stop, the emergency stop button must be released and a reset
performed before the main contactor (or main breaker) can be closed and the drive
started.
) on the control panel of the drive, or turning the operating
Planning the electrical installation
63