Eaton Cutter-Hammer SPB-50 User Manual

I
.
B
.
29
-
801
C
Page
23
“
ground
fault
"
conditions
will
generally
require
more
breaker
inspections
than
those
initiated
by
"
overload
”
operations
.
SECTION
6
:
INSPECTION
AND
MAINTENANCE
6
-
0
GENERAL
6
-
1
WHEN
TO
INSPECT
Encased
Systems
Pow
-
R
Breakers
are
‘
Top
of
the
Line
”
equipment
.
This
means
they
are
manufactured
under
a
high
degree
of
quality
control
,
with
the best
available
materials
and
with
a
high
degree
of
tooling
for
accuracy
and
interchangeability
of
parts
.
Systems
Pow
-
R
Breakers
are
designed
,
built
,
tested
and
listed
in
accor
-
dance
with
the
requirements
outlined
in
the Underwriter
’
Laboratories
,
Inc
.
“
Standard
For
Safety
For Molded
Case
Circuit
Breakers
and
Circuit
Breaker
Enclosures
.
”
UL
489
,
Systems
Pow
-
R
Breakers
exceed
many
of
these
requirements
,
particularly
in
the
areas
of
short
time
capability
and
endurance
.
Design
tests
show
Systems
Pow
-
R
Breakers
have
durability considerably
beyond
minimum
standard
requirements
.
Standard
molded
case
circuit
breakers
have
an
excel
-
lent
record
of
reliability
,
due
to
a
great
extent to
their
enclosed
design
,
which
minimizes
tampering
and
expo
-
sure
to
dirt
,
dust
,
and
other contaminants
.
This
reliability
also
depends
on
proper
installation
and
careful
applica
-
tion
,
particularly
with
reference
to
the
maximum
avail
-
able
short
-
circuit
current
of
the
circuit
to
which
the
circuit
breaker
is
applied
.
Reliability
after
installation
also
depends
upon
environ
-
ment
and
maintenance
.
All
devices
with
moving
parts
require
periodic
check
-
ups
.
A
circuit
breaker
is
no
exception
.
It
is
not
unusual
for
a
circuit
breaker
to
be
in
service
for
extended
periods
and
never
be
called
upon
to
carry
out
its
overload
or
short
-
circuit
functions
.
Therefore
,
the
breaker
should
be
exercised
periodically
to
assure
that
it
is
functioning
.
Encased
Systems
Pow
-
R
Breakers
are
designed
to
be
relatively
maintenance
free
.
However
,
because
of
the
variability
of
application
conditions
and
the
great
depen
-
dence
on
these
breakers
for
protection
and the
assur
-
ance
of
service
continuity
,
inspection
and maintenance
checks
should
be
made
regularly
.
Since
breakers
that
are
designed
,
built and
tested under
UL
489
are
designed
to
be
maintenance
free
,
there
are
no
time
periods
established
by
the
industry
for
the
per
-
formance
of
routine
maintenance
inspections
.
In
the
absence
of
established
standards
,
it
is
recommended
that
a
routine
inspection
be
conducted
at
the
end
of
the
first
six
months
of
service
for
breakers used under
nor
-
mal
operating
conditions
.
After
the
first
inspection
,
inspect
at
least
once
a
year
.
If
these
recommended
inspections
show
no
maintenance
requirements
,
the
period
may
be extended
to
a more
economical
point
.
Conversely
,
if
the
recommended
inspection
shows
,
for
instance
,
heavy
accumulations
of
dirt
or
other
foreign
matter
that
might
cause
mechanical
,
insulation
or
other
electrical
damage
,
the
inspection
and
maintenance
interval
should be
decreased
.
When
a
breaker
opens
a
fault
at
or
near
its
rating
,
give
it
a
visual
inspection
in
the withdrawn
position
with
the
front
cover
and
arc
chutes removed
.
For
breakers
equipped
with
trip
mode
indicators
,
the need
for
this
type
of
inspection
can
be
quickly
seen
.
6
-
2
WHAT
TO
INSPECT
What
to
inspect
and
to
what
extent
is
dictated
by
the
nature
of
the
maintenance
function
.
Routine
,
periodical
inspections
require
one
type
of
observation
.
Inspections
following
a
known
high
level
fault
require
more
detailed
inspections
.
6
-
2.1
PERIODIC
ROUTINE
INSPECTIONS
Periodic
routine
type
inspections
should
normally
be
lim
-
ited
to
external
housecleaning
activities
to
remove
any
dust
and
dirt
that
might
have
accumulated
externally
on
the
breaker
surface
and
terminations
that
could
lead
to
future
dielectric
problems
.
There is
adequate
experience
to
indicate that
where
electrical
testing
is
not
practical
or
cannot
be
justified
,
the manual
mechanical
exercising
of
a
circuit
breaker is
usually
effective
in
assuring
its
prop
-
er
electrical
operation
.
A
few
mechanical
operations
of
the
charging
and
closing
mechanism
,
performed
periodi
-
cally
,
together
with
a
careful
visual
inspection
of
terminal
connections
for
tightness
,
physical
damage
or
evidence
of
overheating
are
considered
good
practice
.
This
will
keep
mechanical
linkages
free
,
and
the
wiping
action
by
Since
maintenance
of
these
breakers
will
consist
mainly
of
keeping
them
clean
,
the
frequency
of
maintenance
will
depend
to
some
extent
on
the
cleanliness
of
the
sur
-
roundings
.
If
there
is
a
significant
amount
of
dust
,
lint
or
other
foreign
matter
present
,
more
frequent
mainte
-
nance
will
be
required
.
With
the
trip
mode
indicators
within
the
trip
unit
,
the
number
of
trial
and
error
procedures
to
determine
the
cause
of
an
automatic
breaker
tripping
operation
will
be
limited
.
Trip
operations
initiated
by
“
short
circuit
”
and
/
or
Effective
7
/
00
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Eaton Cutter-Hammer SPB-50 Specifications

General

Brand	Eaton
Model	Cutter-Hammer SPB-50
Category	Circuit breakers
Language	English