ABB RELION REX640 Technical Manual page 952

Protection functions
Ph V Ph Sel GFC
PP V Ph Sel GFC
Figure 528: Overcurrent/undervoltage characteristics
Table 913: Conversion from element start to monitored data signals
Start of element
I > & U
A
EARTH_FLT
I >> &
A
I > & U
B
EARTH_FLT
I >> &
B
I > & U
C
EARTH_FLT
I >>&
C
I > & I
A
I >> & I
A
I > & I
B
I >> & I
B
I > & I
C
I >> & I
C
I > & I
A
EARTH_FLT
I >> & I
A
EARTH_FLT
I > & I
B
EARTH_FLT
Table continues on the next page
952
U/U
n
sensitivity
Lo A Ph Sel GFC
< &
A
|
EARTH_FLT
< &
B
|
EARTH_FLT
< &
C
|
EARTH_FLT
> & U < |
B AB
>>
B
> & U < |
C BC
>>
C
> & U < |
A CA
>>
A
> & U < &
B AB
|
>> &
B
> & U < &
C BC
|
Fault detected
Normal
High
sensitivity
Str A Ph Sel GFC
START_GFC STARTS_GF
C
TRUE AG Fault
TRUE BG Fault
TRUE CG Fault
TRUE AB Fault
TRUE BC Fault
TRUE CA Fault
TRUE AB Fault
TRUE BC Fault
1MRS759142 F
I/I
n
RELEASE_P RELEASE_P
E P
AG Fault No fault
BG Fault No fault
CG Fault No fault
No fault AB Fault
No fault BC Fault
No fault CA Fault
AB Fault AB Fault
BC Fault BC Fault
REX640
Technical Manual