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Testing
Load
lndicator
OutPut Test
ffi;;;;isirtl
iiip
lll
trip
devices
ha.v9
l
ning pin
connec-
Io]',in
tf',"
itont
of
the device to connect to
the
,load
indicator
L.'i
t.L" p"g" agj
it
tn"
rtao
indicator
is
available
it
can
be
,l"b\o
t"it tnt
output
si
g
nals
lf
there
is a
malf
unction between
th;M;;;;;ories
sudstitulion
of either unit
is
the
best
f
ield
iest to
isolate the
defective
assembly'
nin"
pi[
"onn"ctor'
with the
following code
The
connector
also
contains
+5
volts
on
pin
1
to
power
the
load
indicator.
The output signal is a four
bit,
latched' parallel binary
word
l;;;o;;
ilr-e
catcutaieo
RMS
current
in
th-e
highestPhg:e
tl"lJ"pt""li"Jto
ir.l"
ro,-Jindicator
on Pil-s
2
through
5
of
the
Do not disassemble the
tripping
actuator' tfiis-.lnay
partially
;;r;g;il;;-ii,
and remagnetiiing
requires
special
equip-
ment.
Current Sensor Test
il;;;i.
d";;ibed
in
the
preceding
verifv performance
of
the
trip device
and
tripping actuator'
ThethirdlinkinthestaticTriplll.protection-systemisthe
Oi"ut
"r.
*ornted
current
sensors
These are
special purpose
"Li["]tt"r.to*",r.
when seconoary
current
testing
is
done
*iiH
iH"
ttip
device on
the
breaker' the current sensors
are
subiected
to
approxrmalely their
normal
exc.fqtion
so
that
a
it;'t;t*";-tt,th
,r-,ott"l"iltns
may
snow
up
in
the form
of
pickup
values uOou"
tolurunce lbwever'
further
testing
is
I;r;i"i
ili"tt
it
t,"
pioor"*
is
in the
trip
device
or
in
the
sensors. Moreover,
,n
op"n
"it"'lt
in
the transformer
winding
;;ffi";
*orio
not sr.,o''nl'p at
all
,Therefor:',1,1:.g"^t]tubl"
to
test
the-current
sensors as
described
in
the
tollowlng'
Connections
iiih;';6;;;ice
is
on.the
breaker' disconnect
it
bv
removtng
the
connecto,
,,r,p
"oi.t"the
tower row
of
terminal
block
connections
The
current sensors
can now be
tested
by
making connections
to"in"
Ounana
lacks on the
top
row
of
terminbl block connections
ContinuitY Checks
An
ohmmeter
is
most
suitable for checking the continuity
of
the sensor secondary
*inJlngt
and
wiring
Connect the ohm-
meter from
terminal
r i"
i"t'i"a
5
for
Phise
1'
from terminal
2
to terminal
S
tor
pna"se
Z
from terminal
3
to
terminal 5
for
Phase 3. The exact value
of
resistance
is
not important
s.o
iono*I=ih"tu
is
continuity
The resistance
should
be approxt-
;ri"ly ,i..;;rn"loi
"l
[r'ut"t
on
q,9l'"1..?reaker'
but
can
uuly,,i,iJerv tor the various sensor ratings
available'
When ground protection
is
provided'
the
g^round
sensor
or
neutral sensor'
wf',icrreier
L'used'
is
mount-ed
external to the
circuit
breaker
and
i.'*ir"o
to
the
trip
device
through
the
b;;;k;;t;noatv
ols"onn""it
on
the side
of
the
breaker
To
check this circuit
the
bieaklr
must
be
in the
TEST position-
Then
the
ohmmeter
"f't""[
"'n
be made
between
terminal
4
and terminal
5
of the
iilp
O*i""
terminal
block
The circuit
breaker wiring
dragra;"th*lJte
checked,for
any
special
connections
that mali
fl""-0""n
made
When
the
neutral
metering option
is
suppfieO'
a ninth
terminal
rs
provided
on
the
trio device
terminal
015"[
Cr'e"x
for neutral sensor continuity
[5;;ffi#;;;i
e;J
i"ilinat
s iust
as is
done
ror
ground
fault.
The negative or
common
line is on pin 9'
Pin 8 is a
signal
called
Not
Reset
This signal
is
used
to
enable
ir-r"
LrJi"ii"itor
and
is
+5 volts dc when current
supplied
to
ii'.l"
iie
J"ri"e
is
above approximately
1OO
milliamperes
Be-
io*
ir.r[
lnprt
level none of the
data
is
accepted
All
pins can
;";;;"k;
with
a
voltmeter
while current
i,s
adiusted
as
i".*"i-
f ri"r.ering of
the
LED
output
is
normal'
The load
indicator
assembly
decodes
the number and drives
a
lioht emitting
diode
Oui
Oi'tpf
'V
to indicate the magnitude of
:r';;;;il;i"1;;f";
rl.;
;";iains
an
alarm
settins swrtchband
circuitry
that
setects
any one
oithe
current
levels
indicated and
;i".;;
aUid
itut" atai*
contactwhen
that level
is
exceeded'
ThesolidStateContactisratedlampere,l25Vnominaldc
or
ac.
Tripping Actuator Test
f
t
tdJiiidO"uice
fails
to
trip the
breaker
lh9
!y."-ttion
arises
as
io'*r.Li["t1r.re
trouble is
in the
trip
device or
in
the actuator'
Substitution of
a
known
irip
oevlce
is an
easy way to
supply
a
quick
answer.
lf
anothertrip
device
is
notavailable'
the
actuator can
betested
[V
,ppf
Vi"ei
,"ltage
to iis trip windinq
yith,the
PTS4
test
set'
This
winding connects
to
if'5
t"t*inai
OtocX
with
the
positiv-e
i"iri""r
""
""umber
7
unt
t'"
negative terminal on number 6'
The leads
at
the
actuatorlie
af
sdcotor coded'
,red
is
positive'
Ofacfiis
negative,
and blue
is
the
hold-in
winding'
With the breaker
closed apply
DC
voltage,to the terminals for
the
trip
winding,
ttutt
ui'Eio
'oltage
and-slowly
increase
until
i'r,i
u&ruiottti[s.
The
voltage
shotl'td be
between
3
and
6
volts'
$;iJth;
aciuator
tair'io"irip check the coil resistance
lt
;h;;;
b;Gtween
15
a-nd
zs
ot'ttnt
Double check
the
polaritv
;f ih"
t;tl
uortug"
andirrecx
for any
mechanical
interference
in or around
the actuator'
Hazardous Voltage.
Will
cause severe iniurY or death'
Turn
Dower
oll
and
lock out
suPPlY-
ing device
belore installing'
06X
O7x
08x
09x
1.Ox
(this ls long time
pickup
current)
1.1x
1.2x
1.3x
001.1
01
00
01
01
01
10
01
11
1
000
1001
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