48 Fault tracing
D106 HT Isolator trip There is no feedback from HT
Isolator.
Monitor the parameter
74.06 HT isolator on
feedback. It has designated
DI to detect fault in HT
Isolator. Check the circuit
connected to the chosen
DI.
D107 Transformer
fault
There is no feedback from
Transformer.
Monitor the parameter
74.09 Transformer healthy
select. It is an active low
designated DI to detect
transformer faults. Check
the circuit connected to the
chosen DI.
D108 App External
fault 1
Externally configured fault for a
particular DI.
Monitor the parameter
74.19 Application external
fault 1. It has designated DI
to detect fault assigned for
this parameter. Check the
circuit connected to the
chosen DI.
D109 App External
fault 2
Externally configured fault for a
particular DI.
Monitor the parameter
74.20 Application external
fault 2. It has designated DI
to detect fault assigned for
this parameter. Check the
circuit connected to the
chosen DI.
D110 Rotor circuit
isolator trip
There is no feedback from LT
Isolator.
Monitor the parameter
74.07 LT isolator on
feedback. It has designated
DI to detect fault in LT
isolator. Check the circuit
connected to the chosen
DI.
E101 HT Breaker
Tripped
There is no feedback from HT
Breaker.
Monitor the parameter
74.12 ACK HT breaker
select. It has designated DI
to detect fault in HT
Breaker. Check the circuit
connected to the chosen
DI.
Code Fault Cause What to do