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ABB Modures LZ92-1 - TESTING WITH FRONTPLATE BUTTONS

ABB Modures LZ92-1
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6.5
Testing
the
distance
relay
using
the
test
buttons
32
-
In
order
to
test
the
relay
using
the
test
buttons,
load
voltages
must
be
applied
and
a
load
current
in
excess
of
0.2
x IN
must
be
flowing.
-
Pressing
a
starter
test
button
simulates
a
fault
on
the
corresponding
phase
or
phases.
-·
Mode
Test
Simulated
Starter
Signals
Voltage
button
fault
used
for
1)
meas.
A
R
RO
R
R
RO
corres-
s
so
s E
so
ponds
to
T
TO
T T
TO
position
1
RS
RS
RS RS
RS
switch
1
ST
ST ST
ST
ST
(KI91)
TR TR
TR
TR
TR
RST
RST
RST
RST RST
~
R
RS
R R
RS
corres-
E rSO, StO
E E
SE
ponds
to
T
ST
T T
·rs
position
2
RE
RSO,
RsO,
Rto
RE
RE
RE
switch
1
'rE
STO, sTO,
TrO
'l'E
TE
TE
(KI91)
TR
TR,
RST
TR
TR
TR
RTE
RSTE,
RTE RTE RTE
RE
1)
Small
letters:
more
distant
cross-country
fault
Table
6.1
-
Faults
simulated
by
the
test
buttons
of
the
distance
relay
LZ91

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