ABB ACS880-01 - Protecting the Drive against Ground Faults; Residual Current Device Compatibility; Connecting Drives to a Common DC System; Implementing the Emergency Stop Function

The motor overload protection supports thermal memory retention and speed sensitivity.
For more information, see the firmware manual.
Protecting the drive against ground faults
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 function is not a personnel
safety or a fire protection feature. See the firmware manual for more information.
￭ Residual current device compatibility
The drive is suitable to be used with residual current devices of Type B.
Note: As standard, the drive contains capacitors connected between the main circuit
and the frame. These capacitors and long motor cables increase the ground leakage
current and may cause nuisance faults in residual current devices.
Connecting drives to a common DC system
See ACS880-01 drives and ACS880-04 drive modules common DC systems application
guide (3AUA0000127818 [English]).
Implementing the emergency stop function
For safety reasons, install the emergency stop devices at each operator control station
and at other operating stations where emergency stop may be needed. Implement the
emergency stop according to relevant standards.
Note: You can use the Safe torque off function of the drive to implement the Emergency
stop function.
Implementing the Safe torque off function
See The Safe torque off function (page 277).
Implementing the functions provided by the FSO-xx safety
functions module
You can order the drive with an FSO-12 or FSO-21 safety functions module (option
+Q972 or +Q973) which enables the implementation of functions such as Safe brake
control (SBC), Safe stop 1 (SS1), Safe stop emergency (SSE), Safely limited speed
(SLS) and Safe maximum speed (SMS).
The settings of the FSO-xx module are at default when delivered from the factory. The
wiring of the external safety circuit and configuration of the FSO-xx module are the
responsibility of the user.
The FSO-xx module reserves the standard Safe torque off (STO) connection of the
drive control unit. STO can still be utilized by other safety circuits through the FSO-xx.
80 Guidelines for planning the electrical installation