Siemens 5-GMI-350 - Installation Checks and Initial Functional Tests; Inspections, Checks and Tests without Control Power; Spring Discharge Check

Installation
Checks
&
Initial
Functional Tests
Page
3
The control
power
disconnect
device
is located
on
the
device
panel
above
the lower circuit
breaker and below
the
upper
circuit breaker
.
Figure
1
shows
a
pullout
type
fuse
holder
.
Removal
of
the
fuse
holder
de
-
energizes
control
power
to
the circuit breaker
in
the
respective
switchgear
cell
.
In
some
switchgear
assemblies
,
a
molded
case
circuit
breaker
is
used
in
lieu
of
the
pull
out
type
fuse
holder
.
Opening
this circuit breaker
accomplishes
the
same
result
:
control
power
is disconnected
.
Spring
Discharge
Check
Perform
the
Spring
Discharge
Check
before
removing
the
circuit
breaker
from
the
pallet
or
removing
it
from
the
switch
-
gear
.
Introduction
This
section
provides
a
description
of
the
inspections
checks and
tests
to
perform
on
the
circuit breaker
prior
to
operation
in
the
metal
-
clad
switchgear
.
»
Inspections
,
Checks
and
Tests
without
Control
Power
Vacuum
circuit breakers
are
normally
shipped
with
their
primary
contacts
open
and their
springs
discharged
.
How
-
ever
,
it
is
critical
to
first
verify
the
discharged
condition
of
the
spring
-
loaded
mechanisms
after
de
-
energizing
control
power
.
De
-
Energizing
Control
Power
in
Switchgear
Mounted
Circuit
Breakers
When the circuit breaker is
mounted
in
switchgear
,
open
the
control
power
disconnect device
in
the metal
-
clad
switchgear
cubicle
.
Figure
1
shows the
location
of
this
disconnect
in
a
standard
two
-
high switchgear assembly
.
^
DANGER
Hazardous
voltages
and
high
-
speed
mechanical
parts
will
cause
death
or
severe
personal
injury
and
property
damage
.
Read instruction
manuals
,
observe
safety
instructions and
use
qualified
personnel
.
NOTE
All
figures
of
switchgear
in
this
manual show
the
switchgear
front
hinged
panel
in
the
open
position
.
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Figure
2
.
Standard
Front Panel
of
Circuit
Breaker
.
Figure
1
.
Control
Power Disconnect
.
Courtesy of NationalSwitchgear.com