GE AK-50 User Manual

GE
/
-
74600
Low
-
voltag
*
Powmr
Circuit
Bnakws
TROUBLE
SHOOTING
\
CAUSE
TROUBLE
REMEDY
Contacts
not
aligned
.
Contacts
dirty
,
greasy
or
coated
with
dark
film
.
Contacts
badly
burned
or
pitted
.
Current
-
carrying
surfaces
dirty
.
Overheating
Adjust
contacts
.
Clean
contacts
.
Replace
contacts
.
Clean
surfaces
of
current
-
carrying
parts
.
Relocate
or
provide
adequate
enclo
-
sure
.
Corrosive
atmosphere
.
Insufficient
bus
or
*
cable
capacity
.
Increase
capacity
of
bus
or
cable
.
Bolts
and
nuts
at
terminal
connections
not
tight
.
Tighten
,
but
do
not
exceed
,
elastic
limit
of
bolts
or
fittings
.
Current
in
excess
of
breaker
rating
.
Check
breaker
application
or
modify
circuit
by
decreasing
load
.
Excessive
ambient
temperature
.
Provide
adequate
ventilation
.
Inductive
heating
.
Correct
bus
or
cable
arrangement
.
Travel
of
tripping
device
does
not
provide
positive
release
of
tripping
latch
.
Worn
or
damaged
trip
unit
parts
.
Binds
in
overcurrent
trip
device
.
Failure
to
Trip
Re
-
adjust
or
replace
tripping
device
.
Replace
trip
unit
.
Replace
overcurrent
trip
device
.
Check
application
of
overcurrent
trip
device
.
Check
application
of
overcurrent
trip
device
.
Replace
overcurrent
trip
device
.
Overcurrent
pick
up
too
low
.
False
Tripping
Overcurrent
time
setting
too
short
.
Bind
in
overcurrent
trip
device
.
Failure
to
Close
and
Latch
Re
-
align
and
adjust
attachments
.
Binding
in
attachments
preventing
resetting
of
latch
Latch
out
of
adjustment
.
Latch
return
spring
too
weak
or
broken
.
Adjust
latch
.
Replace
spring
.
Clean
bearing
and
latch
surfaces
.
Hardened
or
gummy
lubricant
.
Safety
pin
left
in
push
rod
.
Motor
burned
out
.
Remove
safety
pin
.
Replace
motor
.
Replace
or
adjust
faulty
device
.
Faulty
control
circuit
component
.
Burned
Main
Contacts
Improper
contact
sequence
(
main
contacts
not
sufficiently
parted
when
arcing
contacts
part
)
.
Increase
arcing
contact
wipe
.
Adjust
contact
sequence
by
raising
or
lowering
main
movable
contact
pivot
block
.
Short
-
circuit
current
level
above
interrupting
rating
of
breaker
.
Requires
system
study
and
possible
replacement
with
breaker
having
adequate
interrupting
capacity
.
Loss
of
contact
wipe
or
pressure
.
Replace
stationary
contact
springs
Courtesy of NationalSwitchgear.com

GE AK-50 Specifications

General

Brand	GE
Model	AK-50
Category	Circuit breakers
Language	English