ABB RELION REX640 - Page 963

The operation of a particular zone is given after the set operate delay time for the
particular zone has elapsed (considering the fault type). The actual operate time
is the value calculated from the initial fault detection and it is not affected, for
example, in case the fault moves between zones.
The general indication of fault for each zone is given in the START_Zx (x = 1...5)
binary output. The faulted phase information can be found from the STARTS_Zx
(x = 1... 5) integer type output signal. This signal indicates (bitwise) the started
measuring elements for the corresponding phase. Value 0 does not exist but due
to the IEC 61850 standard requirement, it is shown by value “-5” as “No fault”.
Value range is thus -5, 1..63. The three-phase fault is here indicated by “AB Fault, BC
Fault, CA Fault”. However, three-phase fault indication for GFC depends also on the
additional condition for voltage (see
Table 913 ).
Table 920: STARTS_Zx information
Value Value information
-5 No zone starts
1 AG Fault
2 BG Fault
3 AG Fault, BG Fault
4 CG Fault
5 AG Fault, CG Fault
6 BG Fault, CG Fault
7 AG Fault, BG Fault, CG Fault
8 AB Fault
9 AG Fault, AB Fault
10 BG Fault, AB Fault
11 AG Fault, BG Fault, AB Fault
12 CG Fault, AB Fault
13 AG Fault, CG Fault, AB Fault
14 BG Fault, CG Fault, AB Fault
15 AG Fault, BG Fault, CG Fault, AB Fault
16 BC Fault
17 AG Fault, BC Fault
18 BG Fault, BC Fault
19 AG Fault, BG Fault, BC Fault
20 CG Fault, BC Fault
21 AG Fault, CG Fault, BC Fault
22 BG Fault, CG Fault, BC Fault
23 AG Fault, BG Fault, CG Fault, BC Fault
24 AB Fault, BC Fault
25 AG Fault, AB Fault, BC Fault
26 BG Fault, AB Fault, BC Fault
27 AG Fault, BG Fault, AB Fault, BC Fault
28 CG Fault, AB Fault, BC Fault
Table continues on the next page
1MRS759142 F Protection functions
REX640
Technical Manual
963