GE AK-2-15 Installation And Operation Manual page 7

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CEK-7302
-a
Installation and Operation of Type AK Power Circuit Breakers
'_
;
,.& '$9 "li \ ,"
,&, ,,h, i '%.
,ng signal:now given energizes
relay X whose contacts close
.-. +s.n ni..n..i+ l I.r,-..,,dl tl-.n ",,-mi""
a> i'an@.complet -z L.l'.z b&I GULL nnrvugu "&C ti.'"Y...b
j, relay coil. With the closing relay coil
energized the breaker closes as described
above. At the same time the closing relay
(.%A"+ "I#.^",. 4" n..nrninn Chn -.n+,-nr,mn
,I ,,9,:
position), due to mechanic%designed inter-' breaker. All of the means provided icr
ference between the enclosure and the tripping the breaker operate through striker
cnrintr r?iar.hsrma lmwr'nn the breaker. If
arms which disnlace th- -=nkn*+e- +*i*
--"....-~- -". --
"__ ____ __ _____ _ _
z&z closing is desired with the breaker
__ -.._ .._. --.. .--c--.- ..-G 'I'~~-IILuIIU"I ** ' p
latch by moving against trip paddlesfasteaed
racked'in, the interference feature must be on the trip shaft. Looking at the breaker
removed, otherwise the breaker can be from the right, counterclockwise rotation
mam~allv
rlnaerl in
thra tent nnsitinn
nrfullv
of the trio shaft causes tl== h-nobnr +A +-in.
,,,uILL ~~"cs.z~ C" .z,'r;L~LYF u1.z L"~.-y.."'~ ---.----I-J -_-II_ -*. .._- ----
r--------
4lav
causing its contacts to reverse pro-
racked out position only,
nti-pump feature.
1.
_~.~. ~~ -l l z i VIFMCL C" CA&p,
clockwise movement resets the mechanism
latch,
The manual trip button, overload
devices, shunt trip, undervoltage tripping
device, and reverse current trip all operate
in this fashion to trip the breaker. The
movement of the striker arms of all of
these, when :
l/32 to l/16 i
bctivated, should move from
rich beyond the point at which
tripping occur 'S. This is what is meant by
the expressior L, "positive tripping".
rt-,
_---.
viding the a
When the breaker closes, the mechani-
With the ratchet type maintenance hand-
le applied to the gearbox shaft, operate
cal operated G switches close to energize the handle until the springs are fully
the motor again and the F switches open charged. The fully charged position is
and de-energize the control relay. The indicated by the spring charge mdicator
auxiliary switch contact opens preventing
and by solid resistance to any further
the control relay from being energizeduntil
handle operation.
the breaker is tripped open. With the G
$?
switches closed, the motor charges the 2*
Push down on the push to close lever to
closing springs ready for the next closing
release the energy stored in the closing
operation.
springs which closes the breaker's con-
tacts.
NOTE: BEFORE MAKING ANY ADJUST-
MENTS TO TRIP DEVICE SETTINGS, THE
BREAKER SHOULD BE IN THE OPEN
POSITION AND CONTROL POWER RE-
MOVED,
Most AK-2 and AK-4 air cil:
ers are equipped witi
.
.
ecuit break-
n series overcurrent
trip devices eltner of the dual magnetic
type (instantaneous and time delay tripping)
or instantaneous alone. Breakers are
designed to carry up to 100% of the con-
, ,.
of their tripdevices.
higher currents for
:,
'
,ill cause overheating * j
/
MANUAL OR MAINTENANCE CLOSING
OF ELECTRICAL BREAKERS
To close AK-4/5-50 breakers:
iy be closed
NOTE: 'AK-4A and AK- 5A drawout breakers
will kn ~~Crin-Croc?
"if+h~~~~FG-in~*m~chlnicm
All electrical breakers in:
manually by means of the maintenance
handle furnished with the breaker or switch-
gear.
.:
To*%lor
" i l l vc c' * p-' A uu aa b.." ' L y"*yL.6 I..\I"..I..-I...
is
in anv nosition other than the "TEST"
or "CONN" position. If the breaker is on
a workbench or on the extended rails, and
i+ in +n kn mlnnarl mrith +hn
maintansnro
se AK-15/25 breakers: IL I Y I" WC b&"YIU -IL&s Cl," illl~..."..~.--
handle, operate the drawout mechanism
mwous
current raring
*v Place the two small hooks of the handle as far as it will go in a clockwise direction.
Any attempt to carry
into the two slots located in the lower This will putthe mechanism in the "connect-
a prolonged period w
-,...+:,w. rre +ha PrnnC an"r.+nhnnn
nrl" nncitinn anal thphrpalrpr,,,hpclnspri.
and possible damage.
G " "V S " " " . b" I ^ "
-*"""____""_"_ =-- ____._
before it can be reinserted into the breaker
compartment in the enclosure.
Sensor*
ereaKe'* ,,",",',,,"~,,~
time current band a
All AK-3 and AK-5 type air circuit
T...__ 7 _^_.^ -..111 L-
-quipped with Power
trip devices.
The
s well as the pickup
e are adjustable. A
"e ullllllu screw adjusts all three
1--r ---+'-,llar characteristic or
1.: Place the maintenance handle on
settings of this devic
the end of the camshaft below the motor.
single cap&p- *L*,-1-. c
phases for ally pai LL~;L
2. Operate the handle until the closing setting, Should a '...--...- - --
spring goes over center and the breaker advertently left loose the Power
closes.
If the breaker is a "quick-close" will revert to the "minimum" pickup
breaker, type AK-4/5-50S, the spring will or "maximum" time delay bands
nnt FC~~PQCL ~mnn cmina nv~r center. hut
inrrlv. Tf
after installatior -**ir-rr*fi
Sensor*
setting-
accord-
+,GV.*i,,m
r
"
q& ~':,~'~,: pJ~U",l
UI u,r llVllL CYIIL.CI..\I"..O
"i
2.
-: ._
Rotation of the long end of the handle
'_____
downwards forcf ?s the shorter end of
the handle upwal rds against the bottom
of the -_,_.._Ii
soienolo armature, and closes
the bre !aker's contacts,
To close AK-2/3-50/751100 breakers:
Place the ratchet "'type maintenance
handle on the shaft that protrudes from
the gear reduction unit.
'&^^^1^ L^'.rll^ ..-a.;, 'I." o,.&mrs nln..nn
1.
0
A'ILuL.*b"I 1 c!aua LU'al scuo
..--* -" ..--- --- -., - -- " - ---. _ D ------ __.. . "rl'Y"I L"I &!'Ly"a i
rate handle until the
can be released by pulling forward on the se%,gs as required for the specific appli-
nlndno* canlcnnirl
armatllre lncnted beneath
ration and tighten all the +h-ymh a*raw~ nn
,,,;/g* -
"perarc l ' a L,uAF "Ll U l U & C uy' r l l g bA' a l C j r
'A". A"*"..-" My".. D"-.bD 1. --
-------I --~~
8, i
i..Ai^,.*^.. ..^"A" "%."..?."A
will ho hnlrl nff hv
'II
.hlnrkinv
link. This
Pi
"/ I,,, i~3. ?', Continue
to ope
"--'-*'e
I"_".."__ _____ -_-__ ___-. -.. ..~~~~
5 : -\ closing springs discharge and close the
the mechanism.
This can be done safely,
"\
contacts.
,,,<,since no moving parts are located in this
_
. . ',:space.
To close AK-50S/75S/lOOS, AKF2Ci. ,'I_
2D breakers and brr-'----
^e...;-.e^rl .,,:*L.
TRIPPING
the mzirk rlnsinp rn~r1
the Power Sezsor*.
For a
more
detailed discussion of the
construction, operation,
and application of
nvarmlrrcd
tri* rimriroa
--o--L- LL^l^"^*...
:aKeI-L) cqupyI;u Wl L Il
". . . --. . ">.. .--= -- . _""L zT:1er L" L&It2 IUIIUW-
-.- ~--"*- "------D
. ..--.mnism. I' * The breaker is tripped open by the
&snlawrncwt
of a mechanism latch. which
ing publications:
1. Maintenance manual for specific
breaker mvolved (see "Rlmin+nn"nn.P"\
I."IU. & X I & rl'u.2, "a -ALA.,-" "'.""""' ' J y-
l'l""LI"LG L."IICLIULY A/' U S I ..A"I".. r"I---"-- _- -- ----- - \
Lal'lCFllcLllrr ,.
breakers
equipped with the quick closing collapse. This trip latch is fastened
mechanism cannot normally be closed man- rigidly to a trip shaft which runs hori-
2. "Selection and Application of Pow-
uallv when in the racked in (connected
zontallv from left to right through the
er Circuit Breakers" GET-1113.
,
_ ~!n Fuse Lockout Device
,,,:,. ' , ~
*" left hand side of the breaker (looking from
latched in the closed air cay
---
m-r r-------
-G- J---1-- ---_ be fureghedwif$ my front).
The purpose of this device is to
allowing
the reset butt< m to extend forward
akers. The open fuse
trip the breaker upon the blowing of anyone
indicating
which fuse hi 1s blown, and simul-
icIe Lollalurs of 3 separately oper-
of the breaker fuses. This energizes the
taneouslv ho1 iding the breaker in the trip-
!S (one per breaker pole) each
coil of the device causing the armature to
fre e position until the latch closed armature
_II FU 111 ,,rallel to corresponding breaker
engage the trip paddle, thereby tripping the
is released by the operating of the manual
"
;'fuses.'
These devices are mounted on the breaker, Once operated, the armature is
reset button.
';,
TYPE AKU
Ooe
1'11t3 LievIce rrray
of the above type bre
lockout devj-- I.---~-+
ated device
~X,i,.,s4 in Y."
:AKER CO