Siemens GMI Series

Interrupter
/
Operator
Description
PAWL
PLATE
MOTOR
CUTOFF
SPRING
CHARGED
SWITCHES
(
LS
1
/
LS
2
)
11
©
SOLENOID
\
©
S
V
365
-
MANUAL
CHARGING
LINK
MANUAL
-
CHARGE
HANDLE
SOCKET
j
258
48
CLOSE
SHAFT
ACTUATOR
O
CHARGED
SPRING
FLAG
52
75
132
UPPER
PAWL
CLOSE
C
CLOSE
SHAFT
SHAFT
©
24
-
2 72
72
DRIVE
\
cm
\
RATCHET
WHEEL
20
MAIN
CAMSHAFT
SPRING
-
CONDITION
INDICATOR
15
MAIN
CAM
SHAFT
DRIVE
3
CAM
ARM
\
18
8
\
RATCHET
JACK
SHAFT
PIN
LOWER
PAWL
16
217
MAIN
24
-
1
CAM
JACK
SHAFT
PLATE
217
-
3
i
CHARGING
MOTOR
ECCENTRIC
i
p
RXLOWER
115
O
i
n
-
i
POINT
"
A
"
DRIVE PLATE
^
13
J
Figure
16
a
:
Pawl and Ratchet Drive
.
Figure
17
a
:
Closing
Mode
Closing
Mode
(
Figure
17
a
)
-
Energizing
the close solenoid
(
265
)
pulls
the solenoid
armature
against
the
closing
shaft
actuator
(
75
)
and
causes
the close
shaft
(
72
)
to
rotate
approxi
-
mately
15
°
If
the
closing springs
are
charged
,
the
close
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
jackshaft
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
a
)
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
a
)
,
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
CLOSE
LATCH
CLOSE
HATCHET
CLOSE
HATCHE
ASSEMBLY
105
*
—
FRONT
MAIN
CAM SHAFT
FRONT
—
3
7
T
<
d
I
\ \
'
,
<
Z
>
)
i
®
)
I
I
I
I
\
SPRING
CHARGING
/
MOTOR
/
SPRING
CHARGING
MOTOR
2
>
d
—
,
.
I
=
Ln
n
Mechanism
-
Mid
-
1991
and
After
(
Viewed
from Left Side
)
(
Refer
to
Pages
10
-
11
)
Mechanism
-
Up
to
Mid
-
1991
(
Viewed
form Left
Side
)
(
Refer
to
Pages
12
-
13
)
Figure
18
a
:
Identification
of
Mechanism
Vintage
11
Courtesy of NationalSwitchgear.com