Siemens GMI Series

Installation
Checks
&
Initial
Functional
Tests
Page
6
6
.
De
-
energize
control
power
by
repeating
Step
1
.
Discon
-
nect
the
plug
jumper
from
the
switchgear
first
and
next
from
the
circuit
breaker
.
2
.
Repeat
the
Spring
Discharge
Check
.
3
.
Verify
that
the
springs
are
discharged
and
the
breaker
primary
contacts
are
open
by
indicator
positions
.
As
-
Found
and
Vacuum
Check
Tests
Perform
and
record
the
results
of
both
the
As
-
Found
insula
-
tion
test
and
the
vacuum
check
high
-
potential
test
.
Proce
-
dures
for
these
tests
are
described
in
the
Maintenance
and
Overhaul
Section
of
this
manual
.
Automatic
Spring
Charging
Check
NOTE
A
temporary
source
of
control
power
and
test
leads
may
be
required
if
the
control
power
source
has
not
been
connected
to
the
switchgear
.
When
con
-
trol
power
is
connected
to
the
GMI
circuit
breaker
,
the
closing
springs
should
automatically
charge
.
Figure
7
.
Connecting
Split
Plug
Jumper
to
Circuit
Breaker
.
The
automatic
spring
charging
features
of
the
circuit
breaker
must
be
checked
.
Control
power
is
required
for
automatic
spring
charging
to
take
place
.
1
.
Open
control
power
circuit
by
removing
pullout
fuse
holder
shown
in
Figure
1
.
2
.
Install
breaker
end
of
split
plug
jumper
(
if
furnished
)
shown
in
Figure
7
to
the
circuit
breaker
.
The
plug
jumper
is
secured
by
means
of
screws
,
over
the
circuit
breaker
’
s
secondary
contacts
.
3
.
Install
the
switchgear
end
of
the
plug
jumper
shown
in
Figure
8
to
the
secondary
disconnect
block
inside
the
switchgear
cubicle
.
The
plug
jumper
slides
into
place
.
The
plug
jumper
interconnects
all
control
power
and
signal
leads
(
e
.
g
.
,
remote
trip
and
close
contacts
)
be
-
tween
the
switchgear
and
the
circuit
breaker
.
4
.
Energize
(
close
)
the
control
power
secondary
discon
-
nect
(
Figure
1
)
.
5
.
Use
the
Close
and
Trip
controls
(
See
Figure
2
)
to
first
Close
and
the
Open
the
circuit
breaker
contacts
.
Verify
contact
positions
visually
.
4
Figure
8
.
Connecting
Split
Plug
Jumper
to
Switchgear
.
Courtesy of NationalSwitchgear.com