ABB MMCO-2 - Page 12

I
.
L
.
41
-
121.2
d
.
Set
the
relay
frequency
to
match the
line
fre
-
quency
(
50
Hz
or
60
Hz
)
.
6.6
.
CONTACT
CLOSURE
OUTPUTS
Alarm
output
;
contact
closes
for
alarm
condition
.
ALARMLO
7.2
.
MINIMUM
TRIP
Instantaneous
annunciator
output
;
contact
closes
on
instantaneous
trip
.
IANUNLO
a
.
Set
the
phase
and
ground
pickup
setting
to
0.1
Amp
for
1
Amp
ct
,
or
to
0.5
Amp
for
5
Amp
ct
.
Set
phase
and
ground
time
dial
to
63
,
and
set
phase
and
ground
curves
to
MMCO
-
11
(
or
IEC
-
C
)
.
If
the
relay
has
directional control
option
,
dis
-
able
directional
control
by setting
“
Dir
Control
”
to
blanks
(
See
Sec
.
5.2
)
.
Instantaneous
trip
output
;
contact
closes
on
instantaneous
trip
.
ITRIP
Time
delay
annunciator
output
;
con
-
tact
closes
on
time
delay
trip
.
TDANUNLO
Tim
delay
trip
output
;
contact
closes
on
time
delay
trip
.
TD TRIP
b
.
Increase
ac
current
to
5
%
below
pickup
value
.
Trip
LED
should
not
blink
.
Common
connection
for
time
delay
annunciator
,
instantaneous
annunci
-
ator
and alarm
.
ANUNCOM
c
.
Increase
ac
current to
5
%
above
pickup
value
.
Trip
LED
should blink
.
Change
time dial
setting
from
63
to
1
.
Time
trip
LED
should
blink
briefly
and
then
light
steadily
.
Common
connection
for
time
delay
trip
and instantaneous
trip
outputs
.
TRIPCOM
d
.
Set
pickup
setting
to
10
times the
minimum
set
-
ting
and
repeat
steps
b and
c
(
above
)
to
verify
accuracy
(
5
%
)
.
7
.
ACCEPTANCE
TEST
7.1
.
ACCEPTANCE
CHECK
e
.
Turn
off
ac
and dc
sources
;
then
apply
dc
sup
-
ply
only
.
Trip
LED
should
be
on
(
sealed
in
)
.
It
is
recommended
that
a
performance
check be
applied
to
the
MMCO
relay
to
verify
that the circuits
are
functioning
properly
.
(
See
MMCO
test
diagram
in
Figure
14
.
)
Proper
energization
of
the
relay
is also
shown
in
this
figure
.
Reset
LED
by
depressing
the
reset
push
-
but
-
f
.
ton
.
g
.
Repeat
the above
test
(
steps
a
through
f
)
with
AC
input
to
each
of
the
remaining
current
inputs
(
A
,
B
,
C
or
N
-
Figure
14
)
.
CAUTION
h .
If
the
relay
has the
directional control
option
,
use
the
directional control
setting
to
enable
the
phase
and
ground
time
,
and instantaneous
directional control
(
setting
=
“
PIT
GIT
”
)
.
Apply
current
above
pickup
to
any
of
the
relay
current
inputs
(
terminals
2
&
3
,
4
&
5
,
6
&
7
or
8
&
9
)
.
Note
that
battery
voltage
is
required
on
directional
control
inputs
(
battery
positive
on
terminals
18
and
19
,
battery negative
on
terminal
20
)
in
order
to
enable
relay tripping
.
While
handling
the
relay
out
of
its
case
,
elec
-
trostatic
discharge
procedures
must
be
fol
-
lowed
.
Refer
to
the
Electrostatic
Discharge
(
ESD
)
Caution
on
page
1
of
this
I
.
L
.
a
.
Connect AC
current
source
to
one
of
the
relay
current
inputs
(
A
,
B
,
C
or
N
-
Figure
14
)
.
b
.
Before
energizing
the
relay
,
make
sure
that the
relay
has the
proper
DC
voltage supply
(
48
-
125
or
250
Vdc
)
.
The
supply
voltage
appears
on
the
front
panel
.
i
.
If
the
relay
has
the
remote reset
option
,
note
that
battery
voltage
applied
between terminals
18
and
20
,
with
current
reduced
to
zero
,
resets
the
trip
LED
if
it
is sealed
-
in
.
c
.
Apply
rated dc
power
to
relay
terminal
10
(
+
)
and
1
(
-
)
.
(
See
Figure
14
)
.
12
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