Siemens GMI Series

Maintenance
Introduction
and
Maintenance
Intervals
Periodic
inspections
and
maintenance
are
essential
to
obtain
safe
and
reliable
operation
of
the
GMI
circuit
breaker
.
When
GMI
circuit
breakers
{
manufactured
beginning
January
,
1992
)
are
operated
under
"
Usual
Service
Conditions
'
'
,
mainte
-
nance
and
lubrication
is
recommended
at
five
year
(
one
year
if
manufactured
before
January
,
1992
)
intervals
or
at
the
number
of
operations
indicated
in
Table
2
.
"
Usual
"
and
"
Unusual
"
service
conditions
for
Medium
Voltage
Metal
-
Clad
Switchgear
are
defined
in
ANSI
C
37.20
.
1
,
sections
3
and
7.1
.
Generally
,
"
usual
service
conditions
”
are
defined
as
an
envi
-
ronment
in
which
the
equipment
is
not
exposed
to
excessive
dust
,
acid
fumes
,
damaging
chemicals
,
salt
air
,
rapid
or
frequent
changes
in
temperature
,
vibration
,
high
humidity
,
and
extremes
of
temperature
.
The
definition
of
"
usual
service
conditions
"
is
subject
to
a
variety
of
interpretations
.
Because
of
this
,
you
are
best
served
by
adjusting
maintenance
and
lubrication
intervals
based
on
your
experience
with
the
equipment
in
the
actual
service
environment
.
Regardless
of
the
length
of
the
maintenance
and
lubrication
interval
,
Siemens
recommends
that
circuit
breakers
should
be
inspected
and
exercised
annually
.
Metric
(
Vacuum
Interrupter
Only
)
•
Deep
Sockets
:
19
and
24
mm
•
Torque
Wrench
:
0
-
150
Nm
{
0
-
100
ft
-
lbs
.
)
•
Allen
Wrenches
Sand
10
mm
American
(
All
Other
Breaker
Locations
)
•
Socket
and
Open
-
End
Wrenches
:
5
/
16
,
3
/
8
,
7
/
16
,
1
/
2
,
9
/
16
and
3
/
4
in
•
Hex
Keys
:
3
/
16
and
1
/
4
in
.
•
Screwdrivers
:
0.032
x
1
/
4
in
wide
and
0.55
x
7
/
16
in
.
wide
•
Pliers
•
Light
Hammer
•
Dental
Mirror
Recommended
Maintenance
and
Lubrication
Periodic
maintenance
and
lubrication
should
include
all
the
tasks
shown
in
Table
1
.
Recommended
procedures
for
each
of
the
listed
tasks
are
provided
in
this
section
of
the
manual
.
A
WARNING
Failure
to
maintain
the
equipment
coufd
result
in
death
,
serious
injury
or
product
failure
,
and
can
prevent
successful
functioning
of
connected
apparatus
.
Theinstx
ctions
contained
herein
should
be
carefully
reviewed
,
understood
,
and
followed
.
The
maintenance
tasks
in
Table
1
must
be
performed
regularly
ADANGER
h
Hazardous
voltages
and
high
-
speed
mechanical
parts
.
Will
cause
death
,
severe
personal
injury
,
or
property
damage
.
Read
instruction
manuals
,
observe
safety
instructions
and
limit
use
to
qualified
personnel
.
Table
1
:
Maintenance
Tasks
•
Checks
of
the
Primary
Power
Path
•
Checks
of
the
Interrupter
Operator
Mechanism
•
Electrical
Control
Checks
•
High
Potential
Test
•
Inspection
and
Cleaning
of
Breaker
Insulation
•
Functional
Tests
For
the
safety
of
maintenance
personnel
as
well
as
others
who
might
be
exposed
to
hazards
associated
with
maintenance
activities
,
the
safety
related
work
practices
of
NFPA
70
E
,
parts
11
and
III
,
should
always
be
followed
when
working
on
electrical
equipment
.
Maintenance
personnel
should
be
trained
in
the
safety
practices
,
procedures
and
requirements
that
pertain
to
their
respective
job
assignments
.
This
manual
should
be
reviewed
and
retained
in
a
location
readily
accessible
for
reference
during
maintenance
of
this
equipment
.
The
user
must
establish
a
periodic
maintenance
program
to
ensure
trouble
-
free
and
safe
operation
.
The
frequency
of
inspection
,
periodic
cleaning
,
and
preventive
maintenance
schedule
will
depend
upon
the
operation
conditions
.
NFPA
Publication
70
B
,
"
Electrical
Equipment
Maintenance
"
may
be
used
as
a
guide
to
establish
such
a
program
.
A
preventive
maintenance
program
is
not
intended
to
cover
recondi
-
tioning
or
major
repair
,
but
should
be
designed
to
reveal
,
if
possible
,
the
need
for
such
actions
in
time
to
prevent
malfunctions
during
operation
.
For
a
"
quick
reference
"
to
these
tasks
see
"
Periodic
Ma
.
nte
-
nance
and
Lubrication
Tasks
"
chart
on
page
36
.
The
list
of
tasks
in
Table
1
does
not
represent
an
exhaustive
survey
of
maintenance
steps
necessary
to
ensure
safe
opera
-
tion
of
the
equipment
.
Particular
applications
may
require
further
procedures
.
Should
further
information
be
desired
or
should
particular
problems
arise
which
are
not
covered
suffi
-
ciently
:
or
the
Purchaser
s
purposes
,
the
matter
should
be
referred
to
the
local
Siemens
sales
office
.
ADANGER
THE
USE
OF
UNAUTHORIZED
PARTS
IN
THE
REPAIR
OF
THE
EQUIPMENT
,
OR
TAMPERING
BY
UNQUALIFIED
PERSONNEL
WILL
RESULT
IN
DANGEROUS
CONDITIONS
WHICH
CAN
CAUSE
DEATH
,
SERIOUS
INJURY
OR
EQUIPMENT
DAMAGE
.
FOLLOW
ALL
SAFETY
INSTRUCTIONS
CONTAINED
HEREIN
.
Removal
from
Switchgear
Prior
to
performing
any
inspection
or
maintenance
checks
or
tests
,
the
circuit
breaker
must
be
removed
from
the
switch
-
gear
The
Installation
and
Initial
Functional
Tests
section
describes
the
removal
procedure
in
detail
.
Principal
steps
are
repeated
here
for
information
and
guidance
,
but
without
the
details
of
the
preceding
section
.
Recommended
Hand
Tools
Type
GMI
breakers
use
both
standard
American
and
metric
fasteners
.
Metric
fasteners
are
used
for
the
GMI
vacuum
interrupters
.
American
fasteners
are
used
in
all
other
locations
.
This
list
of
hand
tools
describes
those
normally
used
in
disas
-
sembly
and
re
-
assembly
procedures
.
21
Courtesy of NationalSwitchgear.com