Siemens 15-GMI-500 - Modes of Operation - Up to Mid-1991

Interrupter
/
Operator
Description
Trip
Trip
O
o
Solenoid
Solenoid
0
°
©
266
266
Trip
Solenoid
Armature
Drive
Cam
o
o
Trip
Solenoid
Armature
o
o
20
O
O
Trip
o
o
Actuator
Trip
152
Actuator
Banana
152
Link
O
Trip
O
113
Hatchet
O
Drive
Cam
99
©
20
Trip
Banana
“
"
Link
Cam
Follower
Shaft
o
79
113
115
Close
Hatchet
Trip
Main
Main
Hatchet
22
Link
Link
99
120
120
Jack
Shaft
Jack
217
Jack
Shaft
Plate
©
Shaft
O
O
Point
"
A
'
f
[
217
n
Figure
15
b
:
Breaker
Open
—
Closing
Springs
Charged
.
Figure
14
b
:
Breaker
Open
—
Closing
Springs
Discharged
.
either
the
charging
motor
or
the
manual
charge
handle
socket
(
52
)
.
When
the
springs
are
charged
electrically
,
the
motor
eccentric
(
100
)
introduces
a
rocking
motion
into
the
drive
plate
(
13
)
.
As
this
plate
rocks
back
and
forth
,
the
lower
pawl
(
24
-
1
)
(
which
is
connected
to
the
drive
plate
)
imparts
counterclock
-
wise
rotation
of
the
ratchet
wheel
(
15
)
,
one
tooth
at
a
time
.
The
upper
pawl
(
24
-
2
)
acts
as
a
holding
pawl
during
electrical
charging
.
When
the
springs
are
charged
manually
,
up
and
down
pump
-
ing
action
of
the
spring
charging
handle
in
the
manual
charge
handle
socket
(
52
)
causes
the
pawl
plate
(
11
)
to
rock
back
and
forth
through
the
movement
of
the
manual
charging
link
(
48
)
.
The
upper
pawl
(
24
-
2
)
drives
the
ratchet
plate
counterclock
-
wise
during
manual
charging
,
and
the
lower
pawl
(
24
-
1
)
becomes
the
holding
device
.
At
the
beginning
of
the
charging
cycle
,
ratchet
pin
(
16
)
is
at
the
6
o
'
clock
position
.
The
ratchet
pin
is
connected
to
the
ratchet
wheel
.
Upon
being
advanced
by
ratchet
action
to
the
12
o
'
clock
position
,
this
pin
engages
the
drive
arms
(
8
)
which
are
keyed
to
the
main
cam
shaft
.
Consequently
,
counterclockwise
rotation
of
the
ratchet
wheel
causes
the
ratchet
pin
to
drive
the
main
cam
shaft
counterclockwise
.
When
the
ratchet
pin
reaches
the
6
o
'
clock
position
,
the
closing
springs
are
fully
charged
.
Driving
pawl
(
24
-
1
)
is
disengaged
,
the
spring
condition
indicator
cam
(
18
)
has
rotated
allowing
the
spring
charged
flag
(
132
)
to
drop
into
the
lower
(
charged
)
position
,
which
also
operates
the
motor
cutoff
switch
(
LS
1
)
and
spring
charged
switch
(
LS
2
)
(
258
)
(
see
Figures
17
b
and
27
)
.
The
closing
springs
are
restrained
fully
charged
by
close
hatchet
(
22
)
against
close
shaft
(
72
)
.
Closing
Mode
(
Figure
17
b
)
-
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
Modes
of
Operation
-
Up
to
Mid
-
1991
Pages
12
-
13
describe
the
operation
of
the
mechanism
used
from
1989
until
approximately
mid
-
1991
.
This
mechanism
can
be
identified
by
observing
the
close
latch
above
the
spring
charging
motor
on
the
left
side
of
the
circuit
breaker
.
Refer
to
Figure
18
b
.
The
close
hatchet
22
has
a
latch
face
which
bears
directly
on
the
close
shaft
72
.
If
the
close
hatchet
includes
a
bearing
which
contacts
a
hardened
latch
installed
on
the
close
shaft
,
refer
to
pages
10
-
11
for
the
description
of
your
mechanism
.
Modes
of
Operation
-
Discussion
Some
maintenance
procedures
are
more
easily
understood
when
the
operating
mechanism
modes
of
operation
are
de
-
scribed
in
detail
.
The
next
few
paragraphs
explain
the
five
modes
or
status
conditions
(
charging
,
closing
,
trip
-
free
,
open
-
ing
and
rapid
auto
-
reclosing
)
of
the
stored
energy
operating
mechanism
.
Note
:
All
discussion
of
modes
of
operation
assumes
that
the
reader
is
viewing
the
operator
from
the
front
,
or
from
the
right
hand
side
.
Spring
Charging
Mode
-
Figures
14
b
and
15
b
show
several
key
components
of
the
operator
mechanism
in
positions
cor
-
responding
to
the
breaker
open
,
with
the
closing
springs
discharged
(
Figure
14
b
)
and
charged
(
Figure
15
b
)
.
Figure
16
b
shows
portions
of
the
operator
mechanism
that
manually
or
electrically
charge
the
closing
springs
.
The
drive
cam
(
20
)
,
the
closing
spring
crank
arms
(
Figure
19
)
and
spring
condition
indicator
cam
(
18
)
are
directly
keyed
to
the
main
cam
shaft
(
3
)
.
The
main
cam
shaft
rotates
counterclockwise
.
The
closing
springs
are
attached
to
the
crank
arms
,
and
are
extended
during
the
charging
cycle
.
Figure
16
b
shows
the
ratchet
wheel
(
15
)
which
is
free
to
rotate
about
the
main
cam
shaft
(
3
)
.
The
ratchet
wheel
is
driven
by
12
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