GE AK-2-15 Installation And Operation Manual page 6

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
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counterclo&wise anil +hnn nlrwhxrinn CUT breaker mechanism and its movement.
L&U
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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-
??$,, mately 120 degrees, and then clockwise
breaker closes, a mechanically operated
LEGEND
CC- CLOSING RELAY COlL
switch opens one pair of its contacts (bb) 0 - CLOS'NG RELAY CONTACTS
.b,
\.>>\,,
back through 120 degrees to the normal
and. closes another (aa). The contacts
E - AhTl-PUMP RELAY CONTACTS
F d G- MECHASICALLY OPERATED SWITCHES
"ye,> _
\'
which open cut out the X relay coil. The L -LCIIILIARY SWITCH CONTACTS __ _\ :,
': \<>i?,
handle position. Four such complete move-
'- \"
ments of the handle are required to close
conhcts which close energize the Y relay
f$ 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. RELAY CDlL
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: "ELEMENTARY DV-GRAM
2
grees travel of the fourth clockwise handle
the breaker before contact at the closing,," ":,'<\
%TERN&t WIRING OUICK CLOSE BREAKER
movement, the spring charged mechanism
switch is released.
*
- is driven over-center and the breaker
z
incorporate into thhe system. 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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