Siemens GMI Series

Interrupter
/
Operator
Description
Pawl
Close
Solenoid
n
Plate
Motor
Cutoff
Spring
Charged
Switches
(
LS
1
/
LS
2
)
11
265
O
.
Manual
Charge
Handle
Socket
258
Close
Shaft
Actuator
o
Manual
Charging
©
o
Charged
.
Spring
©
Link
75
48
52
Flag
Close
Shaft
132
Upper
—
Pawl
Close
Shaft
O
,
cl
®
72
O
24
-
2
72
\
<
i
\
Main
Cam
o
Spring
Condition
Indicator
Cam
1
K
Main
Cam
Shaft
1
Ratchet
-
Wheel
Drive
Arm
15
i
V
*
20
3
M
\
O
Manual
Close
Actuator
(
153
)
o
18
8
Lower
Pawl
24
-
1
o
Ratchet
Main
Cam
Shaft
Jack
Pin
Shaft
16
o
o
3
Jack
o
Charging
Motor
/
Eccentric
Drive
Plate
O
Shaft
Main
Cam
Follower
Plate
O
13
O
217
-
3
Lfl
n
115
Figure
16
b
:
Pawl
and
Ratchet
Drive
Figure
17
b
:
Closing
Mode
hatchet
(
22
)
will
be
released
by
this
rotation
allowing
the
main
cam
shaft
(
3
)
to
be
driven
by
the
closing
springs
.
Depressing
the
manual
close
button
on
the
operator
panel
causes
the
rotation
of
the
close
shaft
(
72
)
by
the
lower
end
of
the
close
shaft
actuator
(
75
)
.
Rotation
of
the
main
cam
shaft
(
3
)
in
a
manual
closing
operation
is
identical
to
that
of
an
electrical
closing
operation
.
As
the
main
cam
shaft
(
3
)
rotates
,
the
cam
follower
(
115
)
is
driven
by
drive
cam
(
20
)
,
and
the
main
link
(
120
)
is
forced
outwards
,
and
rotation
of
the
jack
shaft
assem
-
bly
(
217
)
occurs
.
There
are
three
drive
links
attached
to
Point
"
A
"
of
each
of
the
three
jack
shaft
drive
plates
.
Each
drive
link
is
connected
to
the
movable
contact
of
one
vacuum
inter
-
rupter
.
Closing
rotation
(
counterclockwise
)
of
the
jack
shaft
assembly
closes
the
contacts
of
the
three
vacuum
interrupters
.
During
closing
operation
,
rotation
of
jack
shaft
assembly
(
217
)
forces
the
opening
(
i
.
e
.
,
tripping
)
spring
into
its
charged
position
.
Trip
Free
Mode
-
If
at
any
time
during
breaker
closing
,
the
trip
shaft
(
79
)
(
Figure
14
b
)
operates
as
a
result
of
either
an
electrical
or
mechanical
trip
,
trip
hatchet
(
99
)
is
free
to
rotate
.
When
the
trip
hatchet
(
99
)
rotates
,
cam
follower
(
115
)
is
displaced
by
drive
cam
(
20
)
without
motion
of
the
jack
shaft
(
217
)
.
Mechanical
trip
free
operation
is
provided
by
manual
tripping
,
electrical
tripping
and
/
or
the
mechanical
interlocks
.
Opening
Mode
-
Opening
or
tripping
the
vacuum
interrupter
contacts
is
accomplished
by
rotation
of
the
trip
shaft
(
79
)
.
Rotation
may
be
produced
either
electrically
,
by
energizing
the
trip
solenoid
(
266
)
(
Figure
15
b
)
,
or
manually
by
pressing
the
trip
button
.
Energizing
the
trip
solenoid
causes
the
upper
arm
of
the
trip
actuator
(
152
)
to
rotate
counterclockwise
.
Pressing
the
trip
button
causes
the
trip
actuator
lower
arm
to
move
,
again
producing
rotation
of
the
trip
shaft
All
of
the
linkages
are
trip
free
,
and
tripping
or
opening
is
unaffected
by
charging
status
of
the
closing
springs
or
position
of
the
drive
cam
(
20
)
.
Rapid
Auto
-
Reclosing
Mode
(
Optional
)
-
The
closing
springs
are
automatically
recharged
by
the
motor
driven
operating
mechanism
when
the
breaker
has
closed
.
The
operating
mechanism
is
capable
of
the
open
-
close
-
open
duty
cycle
required
for
rapid
auto
-
reclosing
.
Atrip
latch
check
switch
and
a
relay
(
delay
on
dropout
)
prevent
release
of
the
closing
spring
energy
if
the
trip
hatchet
(
99
)
is
not
in
its
reset
position
.
This
ensures
the
mechanism
does
not
operate
trip
free
on
an
instantaneous
reclosure
.
CLOSE
SHAFT
ASSEMBLY
CLOSE
SHAFT
72
72
CLOSE
LATCH
CLOSE
HATCHET
22
oj
i
-
-
*
N
CLOSE
HATCHET
-
"
^
ASSEMBLY
/
h
\
O
E
105
\
/
t
r
j
o
o
*
—
FRONT
a
o
MAIN
CAM
SHAFT
FRONT
—
3
)
i
V
/
SPRING
k
CHARGING
MOTOR
SPRING
CHARGING
MOTOR
\
X
d
r
“
—
=
!
in
i
Mechanism
-
Up
to
Mid
-
1991
(
Viewed
form
Left
Side
)
(
Refer
to
Pages
12
-
13
)
Figure
18
b
:
Identification
of
Mechanism
Vintage
Mechanism
-
Mid
-
1991
and
After
(
Viewed
from
Left
Side
)
(
Refer
to
Pages
10
-
11
)
13
Courtesy of NationalSwitchgear.com