What To Do In Case Of An Earth Fault Indication - ABB ACS 600 User Manual

Chapter 7 – Fault Tracing
Fault Messages
Fault Text
SC (INU 1)
Par. 9.01 bit 12
SC (INU 2)
Par. 9.01 bit 13
SC (INU 3)
Par. 9.01 bit 14
SC (INU 4)
Par. 9.01 bit 15
SUPPLY PHASE
Par. 9.02 bit 0
SYNCHRO FLT
Par. 9.11 bit 13
USER MACRO
What to Do in Case of
an Earth Fault
Indication
7-6
Cause
Short-circuit in parallel connected phase
module block 1
Short-circuit in parallel connected phase
module block 2
Short-circuit in parallel connected phase
module block 3
Short-circuit in parallel connected phase
module block 4
Missing phase during synchronisation
Synchronisation to supply network is failed.
Supply frequency has changed too much after
ID Run.
There is no User Macro saved or the file is
defective.
This section describes how to trace the cause of an internal earth fault
indication (Warning/Fault EARTH FAULT) of the ACA 635.
An earth fault indication does not always indicate an actual earth fault.
The indication can sometimes be caused by a faulty IGBT or a faulty
NGDR control board.
What to do
Check the fibre optic cables between the NPBU
board channel CH1 and the NINT board of
phase module block 1.
Check the motor and the motor cable.
Check all power plates in the phase module
block 1. If a faulty power plate is detected,
replace the whole phase module.
Check the fibre optic cables between the NPBU
board channel CH1 and the NINT board of
phase module block 2.
Check the motor and the motor cable.
Check all power plates in the phase module
block 2. If a faulty power plate is detected,
replace the whole phase module.
Check the fibre optic cables between the NPBU
board channel CH1 and the NINT board of
phase module block 3.
Check the motor and the motor cable.
Check all power plates in the phase module
block 3. If a faulty power plate is detected,
replace the whole phase module.
Check the fibre optic cables between the NPBU
board channel CH1 and the board of phase
module block 4.
Check the motor and the motor cable.
Check all power plates in the phase module
block 4. If a faulty power plate is detected,
replace the whole phase module.
Check supply fuses.
Check for supply network unbalance.
Perform the ID Run again. See Parameter
99.07.
Create the User Macro again.
ACA 635 IGBT Supply Sections