GE AK-2-15 User manual

GEK-73020GEK-73020
Superseder GEH-2021 DSuperseder GEH-2021 D
TYPES
AK-2/3/2A/3A-15 AKT-2/3/50/50S
AK-2/3/2A/3A-25 AKU-2/3/2Aj3A-25
AK-2/3/4/5/2A/3A/4A/SA-SO/SOS AKU-2/3/4/5/2A/3A/4A/SA-SO/SOS
AK-2/3/2A/3A-75/75S AKF-2/2A-25
AK-2/3/2A/3AdOO/lOOS AKF-2C/2D/2E

U.&cl r5.J V.0”
Magnet ’
\, 250 DC 210-280 1 1.75 0:s 0.15
I I ,\*
.-,,,
I
75 - 85%
Lagging
j I600AC
30 - 35%
c ‘,,::
,‘, I
Lagging t Al c: KnQ t
i3n I v n I inn I
? 14,
I.U I”.”
600 AC 520-635 __’ 8.0 5.0
1 :t:
-
.:,,~:’
,,b..(, y,; __ ,, ” I:
.’
‘* *+ __ ,,
~~ :“; ~~a. *
Limited to 5.OA continuous &ting of $16 GA. wire on Drawout Breakers, ;z::‘, :
I, :” _\
_.
_. ** Adequate for use with AR.Break& Shunt Trip Coils of the voltage :r%ngs
listed in above table. (Maximum current of 12.3A for the 120V. A? coil)
\\: <‘\
.’
:< ‘.
,,+,-- :,, ‘5, ,
‘.
‘1,
_’ _.
‘_
_‘, ,’ .‘“;.,,*\
.\..+>;p\.
: I’ :A
-‘,,
‘,*. ‘,;,* __:_
‘b:: :
.,:,,,:
j;,, ,:, ‘.:,,,i,: : ,.,:,:‘ :
,..
~.‘__ ::s;,,:, i_ ::‘
:.; \ :: ,“
_: ;
I ,,,,.
; s -\,...‘
*e.. ;,
,, :,
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_\ ,,“: “;‘. _, \’
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I,,, :y” : ,c;, ,<, :,
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- ?,_
Breaker Tvppical Outline &onduits
or cables. Steps in the prdcedure
LJ
c lrawine No. for installing enclosed breakers follow:
-
‘\\
In choosing a location for the installa- AK-2-15 and 25
tion offan AK Circuit Breaker, there are AK-3-15 and 25
two factors to be considered. The first AK-2-50 Man. Opera ~”
of these is the effect of the location on AK-2-50 Elec. Oper.
_L the breaker itself. Much better oer- AK-s-5’) Fan. QPer* 1dlL 133.3
.-- ^
,> 3oer. _ 121C7555
695C116 1. If the breaker is an AK-15, AK-25
‘ 12lC7570 or an AK-50, remove it fromthe enclosure.
845C281 With AK-50 breakers, a handle and cam
238C123 arrangement is used for that part of the
.nfmCCrn breaker movement that involves the dis- +
formance and longer life may be expected AK-Y-50 E1ec’* ( -
if the area is clean, dry, dust-free, and AKT-2-50 Mm- OP@r. ‘%zzY
well ventilated, than if the opposites to nvm ? Ch:rz.^^ ,-L^._
these conditions exist, The second con- xk‘LL-.J-r)” Nlilll. “paI-.
engagement or engagement of the primary
disconnect. AK-75 and AK-100 breakers
are bolted solidly to the enclosure frame
sideration is convenience for operation
and maintenance. The breaker should be
easily accessible to the operator, and
there should be sufficient space allowed
for maintenance work to be aone if this
becomes necessary.
102C3650
rnnrrnnr.
IV‘LJDDI
121C7589
121c7590
845C284
269C225
121C7583
121C7557
845C290
‘-‘269C227
121C7585
121C7559
19*r=?mn
AKT-3-50 Elec. dper.
AK-2-75 Man. Oper.
AK-2-75 Elec. Oper
AK-3-75 Man. Opes
AK-3-75 Elec. Oper
AK-2-100 Man, Opel
AK-Z-100 Elec. Ope:
AK-3-100 Man. Oper _
AK-3-100 Elec. Oper.
AK-4-50 Man. Oper: l”IVY”“”
AK-4-50 Elec. Oper. 134C2601
AK-5-50 Man. Oper. ,_ 134C2610
AK-5-50 Elec, Oper. 134C2611
I : The .surfaee on which the breaker is
mounted must be flat throughout in order
not to impose any 1./..~~..1 1.^1. ..I2 .~~ -..
“the breaker unit. Tl
must be rigid enough io avoid any pos- ,$
sibility of the breaker studs supporting the -
weight of the breaker. Minimum cutom
dimensions, as giv
outline drawing, must ne n
provide adequate electrical clc
and need not be removed from the en-
closure.
2. Remove cover plates of enclosure
and prepare them to accommodate whatever
power entrance means is used.
3, Mount enclosing case to supporting
structure,
A K Circuit Breakers are designed to
be mounted in any one of three ways.
,These are dead front mounting, individual
mounting with the enclosure beingprovided,
and drawout mounting in which the breaker
is designed for insertion into a cubicle
in drawout equipment such as a substation
or control board.
4, Replace cover plate and make
power connections to stationary terminals
in mrlnsure.
DEADFRONTBREAKERS
These breakers are designed for mount-
ing in a switchboard or enclosing case of
the customer’s design and construction.
Mounting in this instance consists of bolting
the breaker frame to a supporting structure
within the switchboard or enclosure, con
netting the power buses or. ‘cables, and
making any necessary control cdnnections.
The front cover of the breaker enclosure
may be a hinged door or a plate bolted to
the panel. In either case, it should have
a section cut out, through which the front
escutcheon of the breake%‘may protrude.
Outline drawing numbers giving the dimen-
sions needed for preparing .a+~suitable
enclosure or cubicle for the various types
of A breakers are given below. These
INDIVIDUALLY ENCLOSED BKILAKBKY
en by the appropriate
-.
.
_-_- .__- ___
supplied with several types of enclosures,
mintaine’d to
most common is the wnx~..nl ,.I,---,. L-a e-
the weather resista
earance.
used for favorable
,:a
w... . __---
Individu&lv enr&sed hreaknrs RPP
cuit, operate the breaker several times to
be sure that it IS functioning properly.
(See OPERATION).
AK-4/5-50 breakers which are individ-
ually enclosed will have enclosures of the
AKD5 drawout type. These breakers will
be straight drawout breakers, types AK-4A-
50 and AK-5A-50. (See instructions in this:
book nnder the heading. “Drawout Breakers _--__-..--
AKD5 Equipment”) I’
the latter for outdo~ ~~~..~~.~~~ .~ ..__.
;,;,,locations that may be subject tounfavorable
conditions. All of the enclosures are pi
vided with suitable means for mounting
wails or supporting framework nemfivll
~‘“‘,czL”‘pu’I;““c ryyc “I
nt type. The former is DRAWOUT BREAKERS AKD EQUlPMENT
indoor locations and
or locations or incinor Mounting drawout breakers consists of
simnlv olacing the breaker in the proper
=o- pi&ion with respect to its enclosure,
sliding or rolling it to a stop position and
.. _“_..*“. ,bfi by means of a racking handle and mechl
cover plates are- supplied I.-... I..1 .
vith the 411..
are for standard 2 or 3 pole breakers. closures
which mm hP Arilld nr marhir
------ --^-a -_ ______- __ ...IY..-. led anism, racking it through the last part of its
to accommodate the entrance of bus duets, movement during which the stationary and movable halves of the disconnects engage.
\ \
f ‘..
mrernai custorrion on
he sunoortine structure 6, Before energi&ng the power cir-

GEK-7302 Installation and operation of Type AK Power Circuit Breakers
L -- -___-- -~
,$e~~~~ing‘~~ay which extends out fromthe
\ enclosure to receive the breaker, Small
“+ breakers have guides on their side plates
which slide in channels in the enclosures.
Both large and small breakers have a test
..~ \1 ,’“:@,.
nrd+ rlrm~~mtt hriXake*s are fastened to a the breaker carriage. This 1s the safety cause the breaker to be trip free. Tighten
position stop where both the primar and
1 the 3/8 inch hex head screws inserted in the
secondary contacts are disengaged. gain front holes of the drawout tray during step
lift the position stop handle. Slide the 5 of this operation, The breaker is now in
breaker slightly forward to remove it from the operating position.
the enclosure. ‘__*_.
--. . .
w itnarawing Breaker AKi50, 75 %id”i%O
Inserting Breaker AK-50, 75 and 100 elease the
I_
position in which the I
are engaged, but the
are not. In this posi
Ln r\snrn+nA n,n”+rinQ
secondary disconnects
primary disconnects
tion, the breaker may
VG uprr a-L== zi&GCL1 IU dly without energizing
the load cable or bus.
IT ncn.TAn ‘--“-icant on the disconnect
the force required to
leerz me VredKC1.
1. Trip-:the breaker to r
positiverackihg interlock.
2. Lift the’ racking handle as
use uwn4 1 iuw I
terminals to reduce
ir I II._ LL_^_l_^..
II .-“_ __..D -.
b=fir+in(l. Breaker AK-15 and 25
1. Lift the breaker to a position ap-
proximately six inches above the height of
the compartment tray. far as it
2. Pull the drawout tray out under the
breaker as far as the tray will travel.
NOTE - When installing an individual
skeleton housing for a drawout AK-500r 75,
locate a bolt head over the two front bottom
mounting holes of the housing to provide a
limit stop for the drawout tray.
Q ‘I ,T.,,PV the, h,.~a~~,. ahnu+ l/2” abc,ve
,.\\ will go. ,,
ThiP‘operation w
interlock to
the remaind
Note that he
+A#-
ill re-engage the trip
hold the breaker trip-free for
ler of the racking operation.
re the cam is rotated by lifting
e handle, whereas in racking the breaker ‘-
in, tile operation is p
>‘- 1
erformer, as’s result
of pushing tl- ’Le nancue down. ‘.
_, _,
0, YYWbI -.I- u__I..__ ----_-
il.” An7.rnl nine nn the +I-SV and oush the 3. Reset the handle to ‘its lowered
ULG U”WLI pL”LY .,.. _..I I- _j ---
breaker back into its compartmeit so that position and lift it aa This operation
the rear bottom angle of the breaker is .formed 5at&es to completely
must be per
against the guides on the tray directly back disengage t he cams from their racking
of the dowel pins. pins, After the fi fth lifting stroke let the
4. Slowly lower the breaker onto the handle drop to its normal position.
tray and at the same time guide it so that
the holes in the rear angle of the breaker 4. Pull the breaker out of its com-
fit over the two dowel pins on the tray. If
?a
rfment until the test position stop engages
the breaker is correctlv positioned 01
lthe co hold the breaker in the “test” posit,ion. ; ”
-._ -- .._~~
dowels, its rear and side bottom frame i’
angles will all *sit firmly on the tray. 5. Depress the test position stop han- ‘, >:+
5. Insert two 3/8 inch hex, head screws dle and pull the breaker out of its corn-
through the holes in the front of the side partment as far as the drawout ,tray will
~nalae fin the hrnaker and thread them part travel.
1. Trip the breaker.
baker until the guides
2. Raise the bre
,,
,.‘,
on the sides of the breaker are level with
their mating supporting chant iels in the
enclosure, and slide the break er part way‘
into its enclosure. (Note - ‘I‘he breaker
will be obstructed by a positior I stop at the
bottom of the enclosr ure after the breaker __
has traveled only a E;hort distance into the
cubicle. Lift the Jposition stop handle,
located at the bottom right of the enclosure,
which will release *the position stop and
&+^..^I F....+Lnr intr. ikn
allow the breaker to navel 1111Lll=jl I_IIcv Lllr
““,, cubicle).
Y \ 3. Raise the rackout handle forward
and up as far as its travel will permit and
push the breaker into the enclosure until
irt.^ .,- nlrn.l+
mine am thn h~nrllcz aqsmnhlv
“Cdl asaruuc CLIb “““r”‘b , --__ “-_ _-___- __. ..-J ----- “~_- -rr---
the side of the enclosmg case. tighten screws fjrmly. This ‘prx
. - -. -A../ _-_^- _.
4. Push downward on the I . ’
. .
6. Remove the two 3/8 hex. head
screws which hold the breaker on the tray.
better alignment 01 me primary s~ailolldl Y
gamut nan- studs and the urimarv disconnects for the : ,‘,a .:. j
a
S
-_.-..1 -_ .-_- --.- ..-
novement into the en- to prevent further tra;el. (Note f Refler to _
e operator to provide section describing “Test Position” in t
to make the primary instructions.) then pull the breake
ie stationary studs in
orming this operation, 7. Release the test position stop by primary contacts clea
itc: lever and nush the breaker
..
:
wards as far as its free travel will permit back>
and then pull the racking handle down to,X,bc-t:,zar,,
be sure the trip interlock i-h --,^--^-1P\\
(Note - When the racking handle LL LIL rib
position other than completely down, tl
breaker cannot be c ..--- L-J ^^-I i^ L,.IA
,peraLeu a‘lu ID IICIU
trip-free by the trip interlock.- This ap-
olies to the “fullv in” and “test” positions.)
n+ rackme cam.
‘Y ----“I
le :“,“,,on the cam” which allows the racnk%E TEST POSITION
+r. kn liF+nri nnmrah in o,,nw thp nawl
. .
__-_--.
to engage the first notch on the cam.
,’ ‘_’
*eaker open. If the
. . . ,
8. When the paw1 engages the first
notch on the cam, push the handle down
again to its normal position. This causes’
the cam to rotate about.the racking pin.
Repeat this operation five times to rack the
hTr=csko? into its *‘Final noeratin@ nosition.
‘i’he “Test Positio n”, as referred to in
the previous mstructn ,ns, is that breaker
position where the pri..a-., =-..--
ma7v ~OWPT dincon-
-_-_ _.
nect contacts are safely disengaged but the
secondary control disconnects are engaged.
In this position, the breaker may be tested
or operated manually or electrically with- ’
out enereiv;“m tho nrimarv newer circuit.
se
1. Trip the br
*breaker is not open, the interlocK lever OX ,,* .,y.IA _..-- __I __._-_ _).
the drawout mechanism will not permit Interlocks hold the breaker trip” free until provided”;hYe”;l”aEi;inerhandit: hss been move6
to the completely down position, thus re-
operation of the rackout handle. it is racked into the fully contactedposition.
The fifth stroke of the handle is only a leasing the trip interlock.
up and for- partial stroke and does not result in any
further movement of the breaker. It does
disengaging serve three usefulpurposes: itpositions the Foramorecon‘ 1 I” *
y disconnects. cam so that it cannot rotate and allow the drawout me
AW3 DRAW
3. Slide the br eaker out until the breaker to back out under short circuit TI^.-”
stresses: the oartial stroke signals that the
2. Pull the racking handle
ward as far as it will travel,
the primar:
position stop engages in the front slot m
the bottom of the breaker carriage. The
breaker is now in the “test
where its primary disconnects
disconnected from tl
minals of the enclosure. (Nott
section describing “Test Positic
instructions.)
--- -----,
racking operation is complete; and it re-
Innroo +ko twin intnrlnrli which wr,=cnrncrpd
qlete aescrlprlon or
chanisms and enclosures see
OUT EQUIPMENT INSTRUC-
VIYS, GEH-1830andAKD5DrawoutEquip-
ment Instructions GEI-90890.
” position,
ITLIYG.3 CIlr CA .p LILLIA *“-.. ,...-%... 1.11 -“.D-D--
are safely by the racking pin during the previous four
pumps of the racking arm, NOTE: Once a DRAWOUT BREAKERS AKD5 EQUIPMENT
le line and load ter- . . ..a. . .
? - Refer to racking operation has been started, it must NOTE: AKD
)n” in these be completed as the breaker cannot be
rn.rnrn~A nn+il the ezickinn oDeration is
letter “A” ap
.
4. To remove the breaker from its
enclosure, lift the position stop handle and
slide the breaker forward until the position
stop engages the rear slot in the bottom of
9. After completing the fifth racking
stroke, lift the handle as high as it will go
and allow it to drop to its normal position.
NOTE: Any strokes beyond this point will
5 breakers are identlfleo Oy $ :\~
lpearingafter breaker number - *’
example, “AK-2A-15”. ,\ \.,; “V
Drawout Mechanism Operation - There are
four positions of the drawout mechanism:
”

,,,
‘\:
‘.
.,: :,
‘_
,,,. ._ _,,
._’ - ,~,’ ,.
“
GEK-7302 Installation a&‘Operation of Type AK Power Circuit Breakers !.,:
_\ _’
;.,<..“’
3. Rota& the two track lock links, and 2. Move the breaker and inn@? housing to ” b&zker is in the racked in (connected
pull the right track all the way forward. the fully withdrawn position. (See position). This interlock, when requested, ,~~‘~~~
,\ Breaker Insertion. Stems 1, 2 ami 3). will be orovided with both AKD and AKD5
k 4. *Using a lifting device and the spreader
‘\\ provided for these breakers, raise the
breaker and position it SO that the
mounting pins on the side of the breaker
line up with the slots in the track and
are about 2 inches above the track.
, -
i \\I\
equipment that require quick close breakers
5. Pull the left track out and lower the
breaker so that the mounting pins 1
engage the slots in the tracks.
6.
3. Rotate the two - * . -. track 1OCK mxs and CONNECTIGNS
pull the breaker out to the limit of
-. the track travel. Attach; lifting device All electrical connections should %e
arid-, lift breakt 3 up and away from made to assure good conductivtty. Mating
compartment untilprimar y disconnects surfaces should be parallel and firmly
clear the compartment. bolted or clamped together. Contact sur-
faces should be clean and have a smooth
I”---- the inner housing to the connected4. IvI”“t: finish, The bus or cable connecting to the
__^^I&<
pvaallon by pushing the tracks back breaker should have adequate current-
against the track stops and then follow
Steps 7 and 8 under Breaker Insertion. carrying capacity to prevent excessive heating. Control circuit connections should
The inner housing is now in the con- be made according to the wiring diagram
. . .,.
necrea position and the breaker IS free
from its comp;o rtment. which applies to each breaker specifically.
Depending on the breaker type, those con- ,
Breaker Removal A &4A/5A nections are made either to a terminal
board on the breaker or to the stationary
Engage the racking handle. This is done
by pushing the trip button in the breaker
escutcheon. sliding the cover below it__
‘:: to the right, and inserting the handle
,;I#< on the jackshaft.
,..
>‘<.,, 2,
“‘7, Turn the handle counterclockwise as
far as it will go, (if it will move in 1. Trip the breaker. parts of the secondary disconnects.
that direction) and remove the handle. ,2, :‘Engage the handle and rotate itcounter- ~D~IDUALLY ENCLOSED AKD
8. Push the breaker in against the track clockwise. If thebreaker closing Spring STATIONARY BREAKERS
stops, and lock the track links. _,,_ is fully charged, it will be discharged
automatically : - 3- ^.?A....-* Ir^Cr. ‘PC?%nr,~thmorct evtmnsl m-mnections
9. Close the compartment door. Apain the end of the 5
__ ._.~. ~~~~
engage the ha& .¶----a
.e as in step 6, and
-l-.r-...l-- ^^ 0,.
3. COUPON uL 1u1115 usluie I,,0 Lu~I”lllr~” .,a*-* .-1 _____- __._..
action. for operation of breakev flnn+roI romnonent!
*a -.,‘..a __ --__ _r ______. 9
__- ___- .- and accessories are shown in Fig. 1.
rotate the handle \CIOCKW~SVds rar as ^ - .. . 3. .,_^,_ it- I-,.*3. lhnir
upen me aoor, umook me ~idti;h HULAS,
it will go. Towards the end, a high and pull the breaker all the wa,yforward. DRAWOUT BREAKERS :;i.
__.-
’
,-“force reauirement will be felt as the The breaker may now be lifted from
disconnect fingers on the breaker en- the tracks. _ The customers external con
9 gage the stationary studs. A couple of nections to these breakers are
.
turns later, and the stop will be en- NOTE: The installation of AK-
..A,+-3”3, ray
me srar~onary Y+~LUIIUL+Iy uI.7bvLlllrrc- -...
countered. .The position indicator will lOOS/AKF2C/2D andbreakers equippedwith cated in the breaker compartment as shown . .T-_ n ..--I 0
_____^ .
now show “CONK ”. the q - . ‘- ” li vn Equiprn~~~~~~d Fr:gs+.h%
AC,“+
1
uick-closing mecnanlsm 1sme same dS m I ags. L anu Q,A~)U
the other breakers descrrbed m this book. and 5 AKD5 Equipn,sJ,b. ls.V’Iu I _...
The only difference occurs with drawout breaker is used in a GeneralElectric Corn.
breakers. The compartments that house the pany, Drawout Switchgear Equipment, al..
quick-close breakers will be equipped with external connections must be made to
an interlock that prevents the manual dis- terminal blocks located in the rear vertical
nL~rninrr n$ +kn pjncinc qnylnvq whilp +)a wirin* trnngh nf the eauioment.)
FURNI&ED
<3< ONLY WHEN >5>
<4 < c /‘- REQUWD \D > 4$
<5<-- -> 3>
,_, ” >2>
WHEN H~WUIKLLJ ‘, : d”,>
-RONT VIEW AK-2A-50,75,100
FRONT VIEW AK - IA+,25 8, AK-Z/4+, 25 ‘: F
BREAKER COMFAHTMENP‘ BREAKER COMPARTMENT ::y
;
6 :\‘.
.>.: \ ” TYPICAL WIRING DIAGRAMS ;\
Fig.‘& __ i5.g. 5
,.,.
..I?
,' I

Installation and Operation of Type AK Power Circuit Breakers GEK-7302
OPERATIO
MANUAL CLOSING
AK-15f25 manually operated breakers breakers are closed by a solenoidcoil. The
are closed by turning the handle 90 degrees armature of the solenoid is linked to the
\;;: counterclo&wise anil +hnn nlrwhxrinn CUT breaker mechanism and its movement.
L&U
_, ,%? MArlA UIUII~l*I”(I U” degrees back to the original position. The
operating through the mechanism closes
2 initial counterclockwise movement resets
the breaker
.
The closing solenoid circuit
-s the closing mechanism. The clockwise may be operated by a push button closing
movement closes the breaker, switch on the breaker or by a remote
‘*“’ switch or relav. deoendine on the individual
closes. A charge-indicator, tiumbered 1 to Large
AK breakers (AK-50/~~~00) j’
4, viewed through the breaker front es- are closed by the discharge of a. closing Fig. 8
c-
,‘r,;,
. ),icutcheon, moves with each complete handle spring. This rotates a crankshaft which, ,t”,i
.ysi”“’ movement and indicates the number of ,: -_,_
.,
.;b F by means of an attached roller, operates ,.
complete handle movements that have been a closing cam, forcing the movable breaker ” _,
88,,._
<$..,,~
1.’ performed. contacts against the stationary contacts. i ‘.
_‘:’ The closing spring is charged through the
: q_/_
,,,_a, AK..4/5-50 manual breakers are ~so~.~:~~~~~~atton of a motor and gear reduction
!nergy released through“ ,. energized, operating ‘ihe X
contacts. This
.
closing spring. The seals in the X relay and energizes the
IIP is dnne by a single The electrical control system is com- motor ohce again and the closing operation
This involves prised of an X relay, two double contact takes place. _...._.-_ _
:ountercbckwise from mechanically operated switches (F and G), :
a until a stop is en- a push button closing switch and any means
rt 14-i Afvrnec. rlf mta-
for remote closing which the user mav QUICK($LzP DDwAVFD*
i ,e 0,
closed by means of e
ihe discharge of a
charging of the spri.., _- -__.
stroke of the breaker handle.
raising the handle (
the vertical positiol
countered after abol-. _ __ --b- ___ -_ ____
tion. The spring is then extended to its
fully charged position as the handle is re-
*turn&d to its normal vertical position.
Release of the spring, and resultant closing
of the breaker, occurs when the “close”
button in the escutcheon is pushed. (The
breaker will close only if the racking mech-
anism is in the “CONN” or “TEST”nosition.)
The closing mechanism of the A&2/3 arrangements ” ‘desired.
$f -@hen a closing :’ 50/75/100 manual breakers is a spring signal is given, the X relay coil is ener-
charged mechanism similar to the one gized and it in turn closes its contacts. One
used on AK-2/3-50/75/105 electrically op- of these seals in the X coil circuit; the _
erated breakers. AK-2,‘3-50 ‘751100 manual other three, whtch are arranged tn.series,“’
<breakers are closed bv rorating the closing energize the solenoid closing coil: As the
,v$& ?handle counterclock&se ttirough approxi-
??$,, mately 120 degrees, and then clockwise breaker closes, a mechanically operated
LEGEND
CC- CLOSING RELAY COlL
switch opens one pair of its contacts (bb)
0 - CLOS’NG RELAY CONTACTS
.b,
\.>>\,,
back through 120 degrees to the normal and. closes another (aa). The contacts
E - AhTl-PUMP RELAYCONTACTS
F d G- MECHASICALLYOPERATEDSWITCHES
“ye,>_
\’
which open cut out the X relay coil. The
L -LCIIILIARY SWITCH CONTACTS __ _\ :,
‘: \<>i?,
handle position. Four such complete move-
‘- \” ments of the handle are required to close conhcts which close energize the Y relay f$ I Et,“,s!;q$~‘&~ CO,L
the breaker. During ?he four countercloek- coil, whose contacts now seal in the Y coil
1 -COhTRO: RELAY CONTACTS
x - CONTW.RELAYCDlL
wise movements and the iirst three clock- ‘and hold open the X relay coil circuit. Thts
L - I*CRNkLY OPEN SWITCH CONTACTS
T
wise movements of the handle, the springs prevents another closing operation if one
$2 - NORUALY CLOSED SWITCH CONTACTS
2.’
of the protective -devices operates to trip
s? are charged, After approximately 70 de-
SIMPLIFIEC:“ELEMENTARYDV-GRAM
2
grees travel of the fourth clockwise handle the breaker before contact at the closing,,” “:,‘<\ %TERN&t WIRING OUICKCLOSE BREAKER
movement, the spring charged mechanism switch is released. *
- is driven over-center and the breaker
z
incorporate into thhesystem. When voltage
is first applied to the breaker, (before any
closing signal is given) the motor is ener-
gized through two of the X relay contacts
and the two G switch contacts, The motor
then compresses the closing springs to the
‘pre-charged” position at which point the
mechanically operated F and G switches
Functionally, the quick close mech-
anism differs from the stand-- -
lard electrical
mechanism in that the pre-charge operat ’ion
is extended to completely charge the clos
springs, At the end of the,charging ape]
ing
tion, which takes approxitiatelv 5 secon
(2 seconds for -4/5-5(
:op roller to prevent
n discharging.
a&a\ clostng of thk break&--When
push button or remote switch signals for With
AK-15 and AK-25 electrically onesated a closing operatton, the X relay eoii is tllc -
.._
ICAL CLOSING are operated. This opens Ihe G contacts, plate engages the pl
(Figures 6 and 7) stopping the motor, and closes the F con- closing springs fro1
&cts. which readies the svstem for the \
e
_-I- the closir
? breaker is read7
. . -^1^...“^ ^f LL..”
Ig springs fully charged
r for a closing operation
upVll Ie~c-d~c VI MC:prop roller. This mav
: EGENO
1 X * X RELAY COlL
P * X RELAY COWTACT
1% Y RELAY COIL
be accomplished either manually, by de-
pressing the closing lever on the breaker,
or electrically by closing the remote closing
switch. Upon the release of the prop
roller the closing springs discharge and
close the breaker in the-same ma&&r as ;,,,
on the standard electrical breaker. AK-4/5-
2: 50 breakers are closed through a remote
d switch or the close button in the escutch-
eon, (if the breaker is equipped with a push
button clos‘ing switch).
\ _\
\_ *‘+*, i_
_:_ ~, . .
LEGEND
iii, = CLOSING MOT,--
v
z = RELAY COIL
ry * RELAY CONTl
FGG = MECHANICALLY vr~n.. I c
With control voltage applied, the motor
is energized through the G switch contacts,
and charges the closing springs. When the
eT_,,_ ,-$+:‘- springs reach the fully charged position,
----^-FO~SWIT&ES the mechanically operated switches operate,
-,...^r...:..” +l.^i- -,..-&(,ts . Upon operatton
he motor-is stopped by
G switch. The elostng
spares the breaker for
y 8 1”6bA” C”rlIACI
” e. + = NORYALLY QPEhl SWITCH CONTACTS IcYlT‘3LIIg LIICLI G”P ..-_..^ . ..-.. --ERILTED SW,PCHE* of these switches t
..-..---_. -. -.. iwlTCn : # ’ NORMALLY CLOSED SWITEH CONTACTS the opening of the
. NORMALLY Cl.@SED SWITCH CONl’A,XS :‘=?:,
L - AUXILIARY SWlTCtf CONTACT
of the F switch prl
Fig. 6 Slnoll"ied~ Elem1tary Diagram _::
Intmxai iirin~ M-1 j and ?j kg. 7 Simplifieu Xlrmentary Diagram a closing operation.
Internal Wiring h-50, 75 and 100 ,,‘;,
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CEK-7302
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Installation and Operation of Type AK Power Circuit Breakers ‘_
;
,.&‘$9
“li \ ,”
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,ng signal:now given energizes
relay X whose contacts close
.-. +s.n ni..n..i+ l I.r,-..,,dl tl-.n “,,-mi””
a> i’[email protected] -z L.l‘.zb&IGULLnnrvugu “&Cti.‘“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.
_~.~. ~~ -llzi 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
“ill vc c’*p-‘Auu aa b..” ‘Ly”*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 IY 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‘aL,uAF “LlUl U&C uy’rllg bA‘alCjr ‘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 WlLIl “. . . --. . “>.. .--= -- . _““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. &XI& rl’u.2, “a -ALA.,-” “‘.““““’ ‘Jy- l‘l”“LI”LG L.“IICLIULY A/‘ USI ..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.
,
_ ~!nFuse 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 hi1s blown, and simul-
icIeLollalurs of 3 separately oper- of the breaker fuses. This energizes the taneouslv ho1iding 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‘11t3LievIcerrray
of the above type bre
lockout devj-- I.---~-+
ated device
~X,i,.,s4in Y.”
:AKER CO

,,, ,,
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,,
Installation and Operation of Type AK Power Circuit Breakers GEK-7302
,,+ ,::.@
_ :. ‘%
j ;,,
,,t> ‘. ” I”“.%
“‘. ‘:‘
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.,.><$.~
l_l_
MAINTENANCC. ~INiT IONS
?,j ,),_ - ,,’
;
‘.‘;: ,, ., ._
; ‘,
& j
‘\‘ ,, .,*,r‘. *\ ‘a\\%~\, *\\
,,> INSPECTION i J
: 4, Inspect arc quenchers and contacts
.‘. BEFORE INSPECTION OR ANY,,,,&ZAIN- shorting, or redacing p&s of the breaker,
for breakage or excessive burning.
TENANCE WORK IS DONE, BE SURE THAT refer to the complete instruction for the
THE BREAKER IS IN THE OPEN ‘~PGSI- Should arc quencher barriers or contacts particular breaker type involved. These
be eroded to half their original thickness are:-
;;?N&RAy”L ELECTRICAL POWER, BOTH
AND CONTROL SOURCES they should be replaced. Maintenance Breaker Type
SHOULD ALSO BE DISCONNECTED. Manual
LUBRICATION
\, ‘_ GEI-50299 AK-2/2A/3/3A-15125, AK
Perioaie inspection of the circuit In general, the circ& breaker&e-” GEI-g3353 U-2/2A 3/3A-25
breaker is recommended at least once a quires moderate lumbrication. AKF-2 2A-25 /
‘year, Morefrequent inspections are recom- Bearing
points and sliding surfaces should be lub- GEK-7303 AK-2/2A/3 3A-50/75/103,
i ::;*, mended, if severe load conditions, dust, ricated at the regular inspection periods AKU-2/2A 3/3A-50
/
3::. ‘,’ moisture, or other unfavorable conditions with a thin film of GE Lubricant D50H15. AK-2/2A/3/3A-505/75S/
exist. Before lubricating remove any hardened lOChS, AKF-2C/2D/2E
Always inspect the breaker after a grease and dirt from latch and bearing GEK-7301 Power Sensor Solid State
short circuit current has been interrupt&, surfaces with kerosene. ALL EXCESS Test Instructions :
At the time of inspection, the following A CLEAN CLOTH TO AVOID ANY AC-
LUBRICANT WHOULD BE REMOVED WITH GEK-7310 AK/AK&4/5-50/5OS
checks should be made after,the breaker CUMULATION OF DORT OR DUST. GEK-7309’ I;
has been de-energized., Test I&ructions for In-
I ‘:‘,,-i,,
On drawout breakers, the contact sur- stallation or service of
1. Manually operrite the breaker Power Sensor Equipped
several times, checking for obstructions face of the disconnect studs should, be ’ AK breakers
or excessive friction, cleaned and greased with GE Grease Specifi-
cation D50H47. Renewal parts bulletins for the various
‘~2. Electrically operate the breaker -,~:rz:s types of breakers are:
several times (if breaker has electrical These instructions have as their purr- *i:
.__
pose the imparting of information of a -
Bulletin “*<::,
‘~3 control) to ascertain whether the electrical Breaker Type
,,,‘~ : attachments are functioning properly. general nature concerning the installation :s
:?\‘ .a( GEF-4149 AK-2-15/25 ’ _
ii,,:” ” and operation of Type AK power circuit
breakers. GEF-4150 AK-2-50
,_’ 3. Remove the arc quenchers by re- If more complete and specific GEF-4395 AK-2/2A/3/3A-75 ’
information is required, such as might be
moving the channel shaped retaining bar. GEF-4396 AK-2/2A/3/3A-109
: needed for overhauling the breaker, trouble GET-4527 AK-4/5-50
_
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