ABB REL650 series, Technical Manual

Page: 165 / 856

The start operations from respective loop are binary coded into one word and provides an
output signal PLECND.
RLd
RLd
LdAngle
LdAngle
LdAngle
LdAngle
R
X
jX
Operation area Operation area
R
Operation area
No operation area No operation area
en06000414_ansi.vsd
ANSI06000414 V1 EN
Figure 72: Influence on the characteristic by load encroachment logic
Outputs
The output of the sequence components based phase selector and the delta logic phase
selector activates the output signals PICKUP, PU_A, PU_B and PU_C. If a ground fault
is detected the signal PHG_FLT gets activated.
The phase selector also gives binary coded signals that are connected to the zone
measuring element in ZMOPDIS (21) for releasing the correct measuring loop(s).
Note! In case none of the sequence component based phase selector or the
delta logic phase selector has identified a faulty phase, all measuring loops
in ZMQPDIS (21) are released. If the phase selectors manage to identify
one or more faulted phases only the related measuring loop(s) is released.
The output PHSCND provides release information from the phase selection part only.
DLECND provides release information from the load encroachment part only. In these
signals, each fault type has an associated value, which represents the corresponding zone
measuring loop to be released. The values are presented in table
41 .
0= no faulted phases
1= AG
2= BG
4= CG
Table continues on next page
1MRK 506 335-UUS A
Section 6
Impedance protection
159
Technical manual