ABB Modures LZ92-1 - Page 36

Mode Test Simulated Starter Signals Distance Direction
button fault
1) measured
determined
using
using
2)
~
R RT R
R R'l' ST
s
SR
s
s SR TR
T TS T
T TS
RS
switch 1
E
--
--
E
ext
-- --
(KZ91-l) RE RE
RE RE RE ST
SE SE SE
SE SE
TR
1 OFF 'l'E TE TE
TE TE RS
2
ON RS
RS
RS
RS
SE TR
3 ON ST ST ST
ST TS
RS
4
OFF
TR
TR
TR TR RT ST
RSE
RSE
RSE RSE SR
TR
STE
STE STE STE
TS RS
TRE TRE
TRE TRE
RT ST
RST
RST RST
RST
RT ST
RSTE RSTE
RSTE
RSTE RT ST
R
before R
RT
R
R
RT S'l'
T
before s
SR s
s
SR
TR
s
T
'I'S
T
T
TS
RS
acyclical
E
--
E
E
--
--
ext
RE
RsO, tRO
RE
RE
RE
ST
switch 1
SE
StO, rSO
SE
SE
SE TR
(KZ91-l)
TE
s'l'O, TrO
TE
TE
TE RS
RS
RS
RS
RS SR
'rR
1
OFF
ST
ST
ST
ST TS RS
2
OFF
TR
'rR
TR
TR RT
ST
3
ON
RSE
RSE
RSE
RSE
RE
S'r
4
OFF
STE
STE
STE STE
'rE
RS
TRE
TRE TRE
TRE
RE
ST
RS'l' RST
RST
RST
RT
S'r
RSTE
RSTE
RSTE
RSTE
RT ST
1) Small letters: more distant cross-country fault
2) Directional measurement: same current as distance meas.
Table 6.3 - Faults simulated by the test buttons of the distance relay LZ92-l
34