GE MicroVersaTripPlus AK-50 - Page 14

SECTION
4
BACK
FRAME
CONVERSION
AK
-
75
,
AKS
-
100
BREAKERS
WITH
SST
TRIP
SYSTEMS
MicroVersaTrip
phase
sensors
are
visually
identical
to
the
SST
sensor
.
Follow
the
basic
procedure
given
Phase
Sensors
(
Cont
’
d
)
above
and
replace
the
SST
with
MicroVersaTrip
phase
sensor
provided
.
AK
-
75
,
AKS
-
100
BREAKERS
WITH
EC
OR
POWER
SENSOR
TRIP
SYSTEMS
Note
:
Longer
leads
are
to
air
core
connections
.
CTs
without
air
core
are
shown
.
Step
1
.
Remove
the
existing
trip
devices
and
harnesses
.
Step
2
.
The
MicroVersaTrip
®
RMS
-
9
sensors
mount
on
the
upper
breaker
studs
.
The
sensors
are
held
on
the
stud
with
the
locking
rings
,
as
shown
in
Fig
4
-
5
.
Leave
enough
of
the
stud
exposed
for
the
primary
fingers
to
engage
.
Engage
the
sensor
’
s
anti
-
turn
lugs
with
the
notch
in
the
locking
ring
.
Before
tighten
-
ing
the
locking
rings
,
position
each
sensor
so
that
its
leads
will
exit
between
the
pole
bases
,
as
shown
in
Fig
.
4
-
6
.
Step
3
.
Mount
the
three
sensor
terminal
boards
to
the
rear
of
the
back
frame
using
the
hardware
provided
.
Step
4
.
Form
each
sensor
’
s
leads
downward
between
the
pole
bases
.
Fig
.
4
-
5
.
Phase
Sensor
Installation
for
AK
-
75
,
AK
-
100
Breakers
14
Courtesy of NationalSwitchgear.com