Earth Fault Protection; Settings; Communication Fault; Supervision Of Optional Inputs/Outputs - ABB ACS800 Firmware Manual

Earth fault protection

The Earth fault protection detects earth faults in the motor or motor cable. The
protection is based on sum current measurement.
• An earth fault in the mains does not activate the protection.
• In an earthed (grounded) supply, the protection activates in 200 microseconds.
• In floating mains, the mains capacitance should be 1 microfarad or more.
• The capacitive currents due to screened copper motor cables up to 300 metres
do not activate the protection.
• Earth fault protection is deactivated when the drive is stopped.
Note: With parallel connected inverter modules, the earth fault indication is
CUR UNBAL xx. See chapter

Settings

Parameter 30.17.

Communication fault

The Communication fault function supervises the communication between the drive
and an external control device (for example, a fieldbus adapter module).
Settings
Parameters 30.18

Supervision of optional inputs/outputs

The function supervises the use of the optional analogue and digital inputs and
outputs in the application program, and warns if the communication to the input/
output is not operational.
Settings
Parameter 30.22.
Fault tracing.
to 30.21.
77
Program features