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