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Патент USA US2135250

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Nov., L 19„
m5355250
F. H. ¿COLE
METAL-CLAD SWITCH-,GEAR STRUCTURE
Filed May 27, 1935
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8 Sheets-Sheet l.
Nov. 1, 1938.
F. H. COLE
2,135,250
METAL-CLAD SWITCH-GEAR STRUCTURE
Filed May 27, 1935
8 Sheets-Sheet 2
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Nov. 1, 1938.
F. H. COLE
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2,135,250
METAL-CLAD SWITCH-«GEAR STRUCTURE
Filed May 27, 1935 -
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8 Sheets-Sheet 3
Nov. 1, 1938.
F. H. COLE
2,135,250
METAL~CLAD SWITCH-GEAR A STRUCTURE
Filed May 27, 1935
8 Sheets-Sheet 4
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NOV. 1, 1938.
F; |-|A COLE
A2,135,250
METAL- CLAD SWITCH-.GEAR STRUCTURE
Filed May 27, 1955
8 Shee’LS-Shee’c 5
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Novv l, 1938.
F. H. COLE
2,135,250>
METAL-CLAD SWITCH-'GEAR STRUCTURE
Filed May 27, 1935
8 Sheets-Sheet 6
Nov. l, 1938.
2,135,250
F.4H. COLE
METAL-CLAD SWITCH-GEAR STRUCTURE
Filed May 27, 1935
8 Sheets-Sheet 7
Í'zf/’efz-Z'of :
252665 H Cole
Nov. 1, 1938.
2,135,250
F. H. COLE
METAL-CLAD SWITCH-GEAR STRUCTURE
8 Sheets-Shee‘t 8
Filed May 27, 1935
35
2,135,250
Patented Nov. `1, 1938
UNITED STATES PATENT ori-‘lcs
2,135,250
METAL-CLAD SWITCH-GEAR STRUCTURE
Fred H. Cole, Oak Park, Ill., assigner to Delta
Star Electric Company, Chicago, Ill., a corpo
ration of Illinois
Application May 27, 1935, Serial No. 23,627
23 Claims.
This invention relates to metal-clad switch
gear, and is more particularly directed to switch
gear of this type having main and auxiliary or
transfer busses, and a feeder circuit including a
5 regulator and oil circuit breakers for connecting
the feeder circuit to the main and transfer busses.
In the use of this type of switch gear, I have
found a practicable arrangement for disconnect
ing the feeder regulator for inspection, servicing
10 and repair, but, at the same time, maintaining
uninterrupted service by temporarily connecting
the feeder circuit to the transfer bus. In switch
gear other than the enclosed metal-clad type,
ordinary disconnecting switches can be used to
l5 advantage for this purpose. However, in the
enclosed metal-clad type of switch gear, the units
are ordinarily placed side by side, with no free
space therebetween, and the sides of each of the
cubicles or units are enclosed by metal panels.
«gg If disconnecting switches were employed, they
would have to be placed at the ends of the units
so that they would be accessible for operation.
Such a disposition of the disconnect switches
materially complicates the switching connec
25 tions, so that the use of disconnecting switches in
metal-clad switch gear is not desirable from this
standpoint. Further, in switch gear of the type
disclosed in the present invention, an extremely
compact arrangement of equipment and switch
30 ing connections is desirable, and safe operation
thereof precludes the use of the open type dis
connecting switches in such structures.
It is a primary object of my invention to pro
vide an auxiliary circuit breaker in the regulator
35 circuit, this auxiliary circuit breaker operating
in conjunction with the main circuit breaker that
connects the feeder circuit to the main bus for
completely disconnecting the regulator from the
feeder circuit while service is maintained by con
40 necting the feeder through the transfer circuit
breaker to the transfer bus.
The use of a circuit breaker for the regulator
circuit in conjunction with the oil circuit breaker
connecting the feeder circuit to the main and
4
transfer busses overcomes serious objections to
the use of the open type disconnecting switches.
Moreover, circuit breakers are required to be of
the design commonly known as the lift type,
50 which are connected and disconnected from the
(Cl. 175-298)
as assured as if open type disconnecting switches
were employed.
The present invention provides for mounting of
the auxiliary or regulator circuit breaker with
respect to the main circuit breaker in such man
ner that safety of operation is secured, and so
that inspection, repair and servicing of the switch
gear can be provided within a confined and eco
nomical structure. Also, the arrangement is
such as to facilitate access to the regulator and 10
regulator circuit breaker to allow a repairman
or the like to service the equipment without the
necessity of dismantling of any of the cubicle
structure.
In the ordinary operation of this equipment, 15
the feeder circuit is connected to the main bus
through the regulator circuit breaker, the regu
lator, the current transformers and the main bus
circuit breaker.
If it is desired to work on any
of the equipment in this particular circuit, the 20
transfer bus is energized in any one of several
well known methods, such as by connecting it to
the main bus at a bus tie section. The circuit
breaker connecting the feeder circuit to the
transfer bus can then be closed, and the feeder 25
circuit is then directly connected to the transfer
bus. The circuit breaker connecting the feeder
to the main bus can then be opened, after which
the regulator switch may be opened. In such a
sequence of operations, it is apparent that the 30
regulator switch is called upon to break only the ’ '
charging current of the regulator, and therefore
this switch can have a small rupturing capacity.
It is sufficient if this switch has only the required
voltage and current rating of the circuit. How- 35
ever, it is essential that this small regulator cir
cuit breaker should never be used to open the
load on the feeder, as it may then be required to
open a load beyond its rupturing capacity, with
considerable resulting damage.
40
Ordinarily, the main breakers are provided
with operating mechanisms of the solenoid or
motor type, as is well known, so that these break
ers can be operated electrically at a remote point,
such as a control panel, by means of a control 45
switch. The auxiliary regulator breaker, in the
present invention, is manually operated at the
cubicle.
In the arrangement provided by the present
breaker. With the use of this type of circuit
breaker, visual indication of the position of the
circuit breaker is apparent, and when the break
invention, the main breakers are locked to the 50
cubicle frame by means of draw bars, one of the
draw bars being located on either side of the
breaker and having sliding engagement with re
spect to the frame of the cubicle. The weight of
55 ers are lowered, the safety of the repairman is
the breaker is carriedl by the draw bars at 55
circuits by raising and lowering of the circuit
2
2,135,250
definite bearing points located thereon.
The
auxiliary regulator breaker is mounted on a car
riage which can be moved vertically with respect
to the cubicle frame. rI‘his carriage is arranged
for automatic coupling to the head of the main
bus circuit breaker and moves with the main
breaker as it is raised or lowered.
The present invention contemplates the use of
a series of interlocking mechanisms, whereby safe
operation of the breakers is provided, and the
sequence of operation is controlled in a positive
manner.
In the ordinary operation of the equipment,
the main circuit breaker and the auxiliary regu
15 lator breaker are in raised or switch operating
position, with the main breaker closed and the
transfer breaker open. The feeder is thus being
fed from the main bus through the regulators
and the auxiliary regulator circuit breaker.
20 When it is desired to inspect the regulator or
any of the equipment in the regulator circuit, the
transfer bus is energized, after which the trans
fer circuit breaker connecting the feeder to the
transfer bus is closed. The main circuit breaker
25 connecting the feeder to the main bus is then
opened by operation of a control switch at the
control panel. The regulators are then set at
the neutral position, after which the auxiliary
regulator switch or circuit breaker is opened by
30 means of a manually operated lever at the cubicle.
A lift type truck, of the design now in use for
servicing of circuit breakers in enclosed types of
metal-clad switch gear, is then run into position
and the elevator portion thereof raised until the
35 weight of the circuit breaker is taken by the
truck.
The two draw bars on either side of the
Also, I have provided means whereby the trans
fer breaker cannot be lowered unless the draw
bars therefor are pulled forward, and these draw
bars cannot be moved to their forward position
unless the transfer breaker is in open position.
Also, an _auxiliary switch is provided in the con
trol circuit of the circuit breaker. This auxili
ary switch is mechanically connected to and
operated by one of the draw bars in such a man
ner that the circuit breaker cannot be closed by 10
the control switch at the control panel when this
draw bar has been moved from its circuit breaker
supporting position.
The present invention also provides means
whereby, upon moving the main circuit breaker
into position within the cubicle by means of the
lift truck, the main circuit breaker is automati
cally coupled to the regulator circuit breaker
which is disposed in lowered position within the
frame. Thereafter, upon raising of the main 20
circuit breaker by the lift mechanism lof the
truck, both the main and regulator breakers are
simultaneously raised vertically into closed posi
tion, and remain coupled together. The draw
bars, upon being pushed inwardly to locked posi
25
tion, take up the weight of the main circuit
breaker and allow the truck to be lowered and
removed from the cubicle with the regulator
breaker and the main breaker maintained in
30
operative position.
Another advantage of the present invention
resides in the interlocking means whereby the
main circuit breaker is disconnected by means
of a remotely disposed control switch, and there
after the auxiliary regulator breaker may be man 35
ually disconnected by switch operating means at
circuit breaker can then be pulled forward, which
releases the circuit breaker from engagement
with the frame of the switch gear structure. The
40 elevator is then lowered, the main circuit breaker
the cubicle. The supporting means may be actu
ated only after disconnection of both of the
and the auxiliary regulator circuit breaker being
breakers to provide for lowering of the two
breakers and subsequent removal of the main 40
circuit breaker from the cubicle.
completely disconnected from the circuit by con
joint lowering thereof. 'I'he truck is then moved
In this connection, a distinct feature of the in
vention resides in the use of a regulator circuit
forward which provides for automatic uncoupling
breaker of small rupturing capacity in combina
45 of the main circuit breaker from the auxiliary
quired rupturing capacity, whereby through suit
regulator breaker, the latter breaker being sup
ported in lowered position by the switch gear
frame.
It is a further object of the invention to pro
50 vide a manual operating mechanism for the regu
lator breaker of such a construction that will
permit of automatic engagement and disengage
ment of the mechanism with the breaker so that
the conjoint movement of the regulator breaker
55 and main circuit breaker can be accomplished
without diiiiculty and delay.
In providing for the sequence of operation out
lined above, certain interlocking features of dis
tinct advantage have been disclosed in the present
60 invention.
For example, means are provided
whereby the auxiliary regulator circuit breaker
cannot be opened or closed unless the main cir
cuit breaker is opened. Also, provision is made
whereby neither of the draw bars can be pulled
65 forward to release the main circuit breaker from
the framer unless the main circuit breaker is in
open position. Also, one of the draw bars cannot
be moved to disconnecting position unless the
auxiliary regulator breaker is also in open posi
70 tion.
Further, by certain novel interlocking connec
tions, neither the auxiliary regulator breaker nor
the main circuit breaker can be loweed unless
they are both in switch open position, with both
75 of the draw bars pulled forward.
tion with the main circuit breaker of the re
45
able interlocking means the regulator breaker
must be closed before the main circuit breaker
is closed, and cannot be opened until after the
main circuit breaker has been opened.
50
Other objects and advantages of the present
invention will appear more fully from the fol
lowing detailed description which, taken in con
nection with the accompanying drawings, will
disclose to those skilled in the art the particular 55
construction and operation of a preferred form
of the invention.
In the drawings:
_
Figure 1 is a diagrammatic view illustrative of
the circuit employed in metal-clad switch gear
of the type provided by the present invention;
Figure 2 is an end elevational View of a portion
of the switch gear, showing the main circuit
breaker in operative position;
Figure 3 is a vertical sectional View through
the switch gear structure shown in Figure 2,
taken substantially on the line 3_3 of Figure 2;
Figure 3A is a top plan View of the switch gear
structure shown in Figure 3;
Figure 4 is a partial perspective view of a cir 70
cuit breaker employed in the present invention
and provided with the automatic coupling means
for coupling it to the regulator circuit breaker;
Figure 5 is an elevational view of the main cir
cuit breaker mounted upon a lift truck of the
2,135,250
type used in this design of switch gear structure;
Figure 6 is a partial perspective view of the
regulator circuit breaker, showing in detail the
frame means for mounting the regulator circuit
breaker in position;
Figure 7 is a perspective View of the vertically
movable carriage which forms a supporting
cradle for the regulator circuit» breaker shown in
3
Vcross-braced by’ struts 38 and being tied together
at their base by means of theI horizontal frame
members 39.
The main bus housing is indicated by the ref
showing the interlocking means in closed position,
erence numeral 40, and has disposed therein the
three bus conductors 42 for the three phases of
current led into the bus section. These busses
have jumper connections to terminal contact
plugs 43 which have depending contact portions
adapted to be engaged by plug disconnect mem Il)
bers, indicated generally at 44', carried by the main
bus circuit breaker 45. The opposed terminals
with a portion of the circuit breaker shown in
detail to illustrate the manner of locking the
15 same with respect to the cubicle frame;
Figure 9 is a view corresponding to Figure 8,
46 of the circuit breaker 45 are connected to the
potheads or terminals 4l which are, in turn, con
nected by means of suitable conductors to the III
current transformers 48 mounted upon suitable
Figure 6;
10
Figure 8 is an elevational view, taken from
within the cubicle of the switch .gear structure,
but showing the interlocking mechanism in
opened position, whereby the circuit breakers
may be lowered for inspection and servicing;
Figure li) is a side elevational View of the left
hand draw bar of the cubicle structure, taken
from within the frame, and showing the opera
tive connection between the auxiliary switch and
the draw bar mechanism;
Figure ll is a sectional View taken substan
25
tially on the line II-II of Figure 10 showing
the manner in which the circuit breaker is moved
_into locking engagement with the frame of the
switch gear structure; and
Figure l2 is a detail sectional view showing
30
the coupling engagement between the main cir
cuit breaker and the vertically movable frame
which supports the regulator circuit breaker.
Referring now to the circuit diagram shown
35 in Figure l, two adjacent bus sections of a metal
Clad switch gear installation are provided, the
20
wiring diagram being a one-line diagram, al
though ordinarily three-phase installation is em
ployed. The bus section at the left-hand side
40 of Figure l has the main bus 20 and the trans
fer bus 22. Between the main bus 2l) and the
feeder line F, there is provided a main circuit
breaker, indicated at 23, current transformers
induction regulators 21, and auxiliary regu
45 lator circuit breakers 28.
When the transfer bus is energized, transfer»
circuit breakers 24 are connected to feed the cur
rent to the feeder F through the transfer bus 22
and circuit breaker 24. Some of the feeder cir
50 cuits may be connected to power transformer
banks 32. Potential transformers 30 and current
transformers are provided where it is desired to
meter the power supplied to the feeder circuits or
to the transformer banks. To change a feeder
from the main bus to the transfer bus, in the
left-hand bus section, the main bus 2Q’ is con
nected through circuit breaker 33 at the bus tie
section to the transfer bus 22. Ordinarily, the
main bus 7.5’ is connected through circuit breaker
60 25 to the main bus 2i! of the adjacent bus sec
tion. The right-hand bus section of Figure l is
similar to that previously described, having the
main bus circuit breakers 23', the regulators 21’,
the regulator breakers 28’ and the transfer bus
breakers 24’. The circuit conections for this type
of installation are well known, and it is believed
that no further description thereof is necessary.
Considering now in detail Figures 2, 3, and 3A,
the cubicle or bus section units are indicated
generally by the reference numerals 35, having
the end panels 3G, which carry suitable meters
and other equipment and whichv are provided
with depending structural supporting members
3l comprising a plurality of channel supporting
columns, the adjacent pairs of columns 31 being
supporting members 49.
From the current transformers 48', the three
phases are led to induction regulators 5G’ through
jumpers 5I, and through the induction regulators
and busses 54’ to the incoming contact terminals
53’ of a regulator circuit breaker, indicated at Eil.
The disconnect contact members 52 of the regu
lator circuit breaker 50 are connected through
suitable terminal members 53 to conductors 54
which, in turn, are connected to terminals 55
connected to the feeder circuits. The transfer
bus housing or compartment is indicated at 5.5
and has extending therethrough the three trans
fer bus conductors 5l. The three busses 51 are
connected to suitable terminal contacts 5B which
are engaged by suitableV disconnect contacts 5S
carried by the transfer oil circuit breaker 5l). The
opposed disconnect contacts 6I of the oil circuit
breaker 60 are connected through terminals 63
to conductors (i4 leading to the feeder circuit ter
minals 55.
As shown in detail in Figure 3A, suitable insu
lating barrier plates are provided for segregating
the various terminals of the induction regulators, 40
regulator circuit breaker and .feeder circuits.
Thus the insulating plate I0 extends transversely
across the cubicle separating the compartment
housing the current transformers 43 from the
terminal means 53 and 53’ of the regulator cir 45
cuit breaker. 'The incoming terminals 5.5i’ of the
regulator breaker 5€.) are separated from the out
going terminals 5'3 by means of the barrier plate
I3 which extends substantially centrally through
the upper portion of the cubicle. The incoming
50
regulator breaker terminals 53’ are further sepa
rated from the regulators 5D’ by means of the
transverse barrier member I2 extending between
the side wall of the cubicle and the barrier plate
I3, the busses 5I and 54’ extending through this 55
barrier member in a manner well known in the
art. The induction regulators 5S' and the feeder
circuit terminals 55 are separated from the termi
nals 63 of the breaker 65 by means of the barrier
member I5, through which extend the conduce 60
tors 64 from the feeder circuit terminals 55. It
is thus apparent that the barriers effectively seg
regate the various sets of terminals and the in
duction regulators into individual .insulated com
partments.
^
65
The busses 42 and 5l may be arranged in any
desired position within the bus housings 4@ and
56, such as by being spaced triangularly in the
corners of the housings, or disposed in lateral
alignment, as shown.
70
The circuit breakers 45 and' B9 are connected
through oil retractors 65 and gas relief valves to
exhaust headers 56. The specific details of con
struction of the bus unit are well known to those
skilled in the art, and it is believed that a gen
4
2,135,250
eral description thereof will suñice for the pur
poses of the present invention.
Considering now in detail Figures 4 and 5, an
ordinary type of bus circuit breaker, such as the
circuit breaker 45, is provided, having the ex
tending disconnect contacts indicated at 44 and
46. These disconnect terminals may comprise
insulating tubular members enclosing flexible
sockets of the type disclosed in the copending
10 application of Alfred Alsaker and Fred H. Cole,
Serial No. 681,158, filed July 19, 1933, or of any
other desired type. The circuit breaker is pro
gaged upon extending shoulder portions |00 of
the members 96, and upon operation of the crank
S8 the members 90 are raised or lowered, and in
turn raise and lower the circuit breaker 45. The
details of construction of the hoisting and truck
structures are well known and need no further
description.
vided with a head or dome structure 10 which
Referring now in detail to the regulator circuit
breaker and its supporting cradle, indicated in
Figures 6 and '1, the circuit breaker 50 is pro
vided with the extending disconnect terminals 52
has outwardly projecting lug portions 1| provided
which are of the type disclosed in the above men
15 with suitable means for securing the tank thereto.
The circuit breaker is supported by a pair of
brackets 13 and secured thereto by stud bolts 14
which thread into tapped holes in the bosses 15
of the dome 10. The circuit breaker operating
mechanism 18, which may be of either the sole
noid or motor type, is bolted to the plate 11 which,
in turn, is attached to the brackets 13 through
angle members 16. A secondary plug disconnect
ing means is enclosed within the housing 19.
This disconnecting means may be of any suit
able type, but I prefer to use the type disclosed in
the copending application of Elias S. Cornell and
Charles A. Koerner, Serial No. 685,047, filed Aug
ust 14, 1933. This disconnecting means automati
cally connects and disconnects the circuits of
the breaker operating mechanism when the
breaker is raised or lowered to or from its oper
ating position.
The main operating shaft of the breaker is in
35 dicated at 80. Connected to this shaft and rotat
able therewith on one end is the camming lug 82,
and on the other end is a similar camming lug
except that the lower projecting portion of the
lug 82 is omitted. The purpose of these camming
40 lugs will be described in detail in connection with
the interlocking mechanism.
'
At the side of the circuit breaker opposite the
shaft 88 a channel-shaped bracket member, indi
cated at 83, is bolted to a supporting pad carried
45 by the head 10 of the circuit breaker and is pro
vided with the extending arms 84, having pro
jecting shoulder portions 85 and pivoted coupling
members 86 which are adapted to provide for
coupling engagement between the main circuit
50 breaker and the auxiliary regulator circuit break
er. This coupling engagement will be described
in detail as the description progresses.
The brackets 13 are also provided, on their ex
ternal surfaces, with a pair of channel-shaped
55 socket members 88 which are welded or otherwise
secured to the exterior _faces of the brackets, and
which have central open portions indicated at 89
adapted to receive vertically extending support
mg guides 99 carried by the elevating mechanism
60 'of a lift truck indicated generallyr at 92 in Figure 5.
The lift truck 92 is mounted upon suitable roll
er members 93 attached to horizontal base mem
bers Si!! for facilitating its movement, and is pro
vided with a vertical structure 95 which supports
65 the housing mechanism. The space between the
horizontal members 94 is entirely open so that
the breaker can be lowered to the floor and the
truck removed, or so that the breaker head can
be removed from the tank.
This hoisting structure comprises spaced mem
bers 95 guided by suitable rollers 91 within the
channel member 95 and operated by means of
the crank member 98 for raising and lowering
movement, the jaw members 90 engaging within
75 the openings 89 in the socket members 88 for
70
supporting the circuit breaker. The lower por
tion of the brackets 13, indicated at 99, are en
tioned copending application of Alsaker and Cole.
The breaker head is shown at |02.
The operat
ing linkage is contained within the housing |03
which is provided with bearings |04 for the op
erating shaft |05. Secured to the operating
shaft |05 is a crank |06 which carries the crank
pin |01 adapted to be engaged by suitable mech
anism for operating the breaker. The support
ing frame |02 is provided, upon opposite sides
thereof, with extending angle members |08,
provided with adjusting set screws |09 at spaced
intervals therealong.
The angles |08 may be
welded or otherwise suitably secured to the sur
rounding frame |02.
Considering Figure 7 in detail, the cradle or
supporting frame for the regulator breaker com 30
prises a vertically slidable carriage member hav
ing vertically extending channel bars ||0, which
are adapted to have sliding movement within the
channels 31, as shown in Figure 3, by means of a
pair of offset roller members ||2 and ||3 carried 35
by each of the channel members | |0. The roller
members | |2 are offset with respect to each other
so that their respective bearing faces will engage
with the flanges of the frame channel 31 (Fig
ure 3) in such a manner that vertical alinement 40
of the disconnecting terminals will be main
tained in the longitudinal direction. Suitable
stop means, such as the bolt member | I5 shown in
Figure 3, or a similar stop member, limits the
downward movement of the frame. The cradle 45
frame also includes a pair of angularly extend
ing angle members ||5 secured at their lower
ends to the channels ||0 by welding or the like,
and provided with a cross-frame or bracing mem
ber ||1 secured therebetween.
At the upper ends of the channels ||0, a pair
of laterally extending supporting members are
provided, indicated at ||8. Upon the inner sur
faces of the member | I8 are provided a pair of
channel members ||9 which may be welded or
otherwise secured thereto, and which are adapted
to receive, on their upper surfaces, the angle
members |08 secured to the frame |02 of the reg
ulator 50. A suitable channel member |20 is se
cured across the forward ends of the members GO
||8, and serves as an abutment means for the
angularly extending bracket members ||6, which
may be welded thereto or secured in any desired
manner. Secured to the inner surfaces of the
raised portions |22 of the bracket members ||8 65
is a substantially U-shaped bowed channel mem
ber |23, which is held in position by means of a
plurality of rivets |24. The channel member |23
has secured thereto, adjacent the ends of the ex
tending leg portions thereof, a pair of angle 70
brackets |25, which are provided with set screws
|26 adapted to have bearing engagement with
the vertical wall of the housing |03 of the regu
lator.
Thus, upon positioning the angle members |00 75
aisaszsò
of the regulator frame upon -the channels _l I9,
rearward movement of »the regulator with respect
to the vertical lift frame or cradle is prevented
by engagement of the rear surface of the housing
|03 with the angle brackets `|25 and set screws
|26. Forward movement of the regulator yframe
is prevented by means of a pair _of set screws
|21 carried by the channelmember | 20 and which
cradle. Thus the two circuit breakers are coupled
together for conjoint vertical movement, and this
coupling is maintained-in engagement at all times
that the circuit breakers are in operating posi
tion, as the .cam plates |3| extend vertically a
sufficient distance to maintain the members 86
rotated into latching position.
Upon release of the main ycircuit breaker from
are adapted to engage the forward edge _of the support upon the frame of the cubicle, and upon
supporting frame |02 of the regulator. Thus, lowering movement thereof by means of the lift lO
the regulator breaker may be disposed within the truck, the coupling engagement is maintained to
frame shown in Figure 7, and securely locked lower the regulator circuit breaker simul
therewith for vertical movement upon corre
taneously, and vupon the regulator circuit breaker
sponding vertical movement of the frame within reaching Aits lowermost position as determined by
the channels 31. The pin |01 of the regulator -the stop H5, the main kcircuit breaker at this
breaker extends outwardly `of the chamber H8, time is free of engagement with the frame and
whereby it may be readily engaged by suitable can be withdrawn outwardly of the cubicle, the
operating mechanism. If desired, the set screws coupling engagement between the two circuit
and locking means may be omitted, land proper breakers being automatically released by the lugs
20 alignment of the regulator breaker within the
|34 having moved off »of the lower edge of thecam 20
cradle may be secured by proper correlation Yof
the design of the cradle and regulator breaker
Considering now in detail Figures 8 and 9,
frame |02 to provide a standardized and inter
which are detail elevational views showing the
changeable construction that will bein alignment »right-hand draw bar ,and associated >interlock
at all times.
ing mechanism for controlling the operation of
Referring now briefly to Figure l2, in vwhich the circuit breakersand the removal and replace 25
is shown in detail the coupling engagement be
ment of the same, the draw bar is indicated
tween the main circuit breaker 45 and the regu
generally by th-e reference numeral |48. The
BO
later circuit breaker 50, it will be noted that the
coupling lugs 88 are substantially U-shaped, and
straddle the leg portions 84 of the brackets 83,
being pivoted thereto by means of thepin mem
bers |29. A suitable spring member |30, mount
ed about a pin member |32 carried by the arms
84, is adapted to bear againstalower depending
portion |33 of the lug members 86, extending
along the inner surface of arms y|34. Exteriorly of
the arms 84, as shown in detail in Figure 4, the
lugs 85 are provided with laterally and outwardly
extending offset portions |34, which, when in
normal position, are urged forwardly of the arms
`84 by means of the spring members |30. Upon
lateral movement of the circuit breaker 45 in
wardly toward the angle |23, by means of the
truck 32, the shoulder portions 85 »of the arms
84 will be disposed under the channel |23, and,
tion |42 to facilitate movement of the same.
The
handle |42 has a projecting boss portion |43
which serves to `limit inward movement of the 35
bar |40 with respect to the channel 31, the draw
bar |40 being made preferably of several sec,
tions, although it is apparent that it can be made
of a unitary member, if desired. Between the
channels 31, connected by the strut members 38
at the left-hand end of the cubicle frame struc 40
ture shown, in Figure 3',__a pair of laterally extend
ing channel members are provided, indicated by
the reference numerals |44 and |45.
Spaced ver
vThe stop ||5 provides for holding the regulator
tically between the channels |44 and |45, and se
cured to the inner surfaces thereof, is a plate
member |45 having apair of bracket portions |41
bolted or otherwise secured thereto forming
guiding slots for the central portion of the draw
supporting frame in position so that the main
circuit breaker may be moved laterally and ver
bar |40. A third channel ymember |48 is se,
cured to the outersurface of the channel 31 im
as shown in Figure 12, upon a raising movement
will engage the under surface of the channel.
tically into engagement with the angle |23 in
this manner.
(SO
channels 31 are provided with suitable slots to
provide for lateral lreciprocatory movement of the '.30
draw bar |40 with respect to the channel, the
draw bar being provided with a handled por
Upon further vertical movement of the main
circuit breaker, the lug portions |34 of the cou
pling members 86 are moved rearwardly by en
gagement with the cam plates |3| secured to the
channels 31 at each side of the bowed portion of
the channel |23, and serve to rotate the coupling
lugs 86 in a clockwise direction about their pivots
|23. This brings the upper latching portions |35
of these lugs into engagement with the upper
surface of the channel member |23, and upon
further vertical movement of the main circuit
breaker 45 the channel |23 is clamped between the
shoulder 85 and the under surface of the latching
portion |35 of the lugs 86. During the time that
this coupling engagement is being effected, the
main circuit breaker 45 is lifted upwardly by
'Il means of the lift mechanism carried by the truck
mediately below the channel member |45, and im
mediately below the channel member |48 an angle
bracket member >|49 is disposed within the chan
nel y31 and is yprovided with a stop member |50
on the upper surface thereof.
`
in Figure 9, is »provided with a _pair of inwardly
,extending flanges |52 defining a channel having
_an upper limiting stop member |53 disposed
therein. `Spaced `from the channel formed by p60
the flanges |52 is a third flange |54, which is
adapted to form one deñning surface of a second
channel opening. On the upper surface of the
channel member v|48 is disposed an inwardly ex
tending flange |55 extending between the flanges 65
_|52 and |54, and a >second corresponding flange
|58 extends from the Achannel ,31 to a position
spaced outwardly from the flange |54 vand de
fining a channel opening in ¿alignment there
92, and in turn serves to move the regulator
with.
breaker frame upwardly within lthe channels 31
by means of the abutting engagement between
the shoulders ¿85,and the angle member |523 car
Referring now. to Figure 4, it willvbe noted that
the bracket »members 13 are provided, on their
fifi ried by the regulator circuit ¿breakersupporting
55
The plate member |36, as more clearly shown
`outer surfaces, with substantially rectangularly
shaped lugs |60, whichvarespaced apart a ydis
2,135,250
6
tance equal to the spacing of the flanges |52 and
|54.
The lower surfaces of the lugs |50 are re
cessed to define bearing portions |6|.
In securing the main circuit breaker 45 in sup
porting position upon the frame of the cubicle,
the circuit breaker is moved inwardly to a posi
tion such that the lugs |60 carried by the brack
ets 13 thereof are positioned in alignment with
the channel formed by the flanges |52 and in
ll) alignment with the defining surface of the flange
|54. Below the draw bar |46, similarly flanged
members |63 and |64 are provided, and as shown
in dotted lines in Figure 9, the lugs |60 are
moved inwardly until the innermost one there
of abuts against the stop |50 at its lower end,
and/or against a depending portion of the ñange
|63 at its upper end. The hoisting mechanism
of the truck 92 is then raised, raising the brack
ets 13 with the circuit breaker 45, and simul
20 taneously raising the lugs |60, which are guided
between the flange |63 and one end of the flange
|55, and between the flange |64 and the end
of the flange |56. Upon further upward move
ment, the lugs pass over the inner surface of
the draw bar member |40, and pass into the
channels deñned by the flanges |52 and by the
flange |54, assuming a position substantially as
shown in Figure 8.
The draw bar |40 is preferably in three pieces,
30 and has a central portion |65 which is of slightly
heavier stock than the remaining portions of
the draw bar. This portion |55 may be riveted
or in any other suitable manner secured to the
The lugs 82, carried by the shaft 80 of the
circuit breakers, are normally, when the circuit
breaker is in disconnect position, in the position
shown in Figure 4 and in dotted lines in Fig
ure 8. If the circuit breaker were in connect
ing position, the shaft 80 would be rotated to a
position such that the lug 82 would be in the
position shown in full lines in Figure 8.
This
would prevent raising of the circuit breaker, since
the lug 82 cannot fit within the space between
the channel 31 and the bracket support |60 When
the draw bar is pulled out. Thus, the circuit
breaker must be in its disconnect position when
it is inserted into the cubicle and raised into
supporting position.
Considering now the operating mechanism for
the regulator circuit breaker, the pin |01 of this
breaker is indicated in section in Figures 8 and
9. This pin, when the circuit breaker is in con
nected position, is in the position shown in Fig 20
ure 8, and is engaged between the bifurcated
ends |12 of a pivoted operating member |13 car
ried upon the pivot pin |14. The operating mem
ber |13 has a. laterally extending offset portion
|15 adapted to bear against a vertically extend 25
ing angle member |16 secured by means of rivets
|11 to the draw bar |40.
The member |13 is provided with an offset web
portion indicated at |18, which prevents further
counterclockwise movement of the member |13 30
from the position shown in Figure 8. The mem
ber |13 is rotated about its pivot |14 by means
of a link member |19 connected by means of
remaining portions of the draw bar |40, the end
portions of the member |65 and the rivets pref
pin |80 to an offset portion of the member |13,
the link member at its opposite end being con
erably being countersunk to provide a smooth
surface whereby the lugs |60 may slide thereover
in passing from the flanges |63 and |64 to the
flanges |52 and |54. The outer end |65' of the
40 member |65 strikes the flange of channel 31
when the draw bar is pulled outwardly and
nected by pin |82 to one arm |83 of a bell crank
|84 pivoted about the shaft |85.
serves as an abutment means for limiting out
ward movement of the draw bar.
Upon positioning of the lugs in their upper
most position, as defined by the stop |53, the
draw bar |46 is pushed inwardly by means of
the handle |43, and a pair of bearing support
ing members |66 and |61 carried by the portion
|65 thereof are adapted to be moved into posi
tion beneath the channel formed by the flanges
|52 and the channel defined by flange |54. These
bearing portions |61 and |68 are provided with
raised bearing surfaces |69 which are adapted
to be engaged in the bearing surfaces |6| formed
in the lugs |60, to provide for proper bearing
support of the main circuit breaker 45.
The bearing support |68 is provided with an
upwardly extending portion |10 having a shoul
der portion |12 spaced from the bearing por
tion |69 thereof a distance corresponding sub
stantially to the vertical extent of the lug |60,
thereby defining the uppermost position of this
lug. Thus, after the lugs have been raised to
a position within the channels |52 and |54, the
draw bar is moved inwardly through the chan
nel members 31 positioning the bearing supports
|61 and |68 beneath the lugs, and upon lower
ing of the hoisting mechanism, the weight of the
main circuit breaker 45 is transferred to the bear
70 ing supports |61 and |68, which in turn transfer
the weight to the horizontal channel member
|48. The hoisting mechanism can then be low
ered, withdrawing the guides 90 from the socket
openings 89 in the members 88, and the truck
can then be removed from the cubicle.
A supporting bracket for the pivot |85 and
the pivot |14 is provided by means of the bracket
member |86, which has opposed parallel side
plates which are fastened to the frame 35 by
means of the flanged portion |81 and to the
channel 31 by means of the flanged portion |88.
The opposite end of the bell crank |84 is
connected by means of pin |89 to a lever mem
ber |90, there being a spring |92 having one end
thereof fixed to a pin |93 carried’ by the bracket
|86.
The spring |92 tends to draw the rocker
arm in a counterclockwise direction about the
pivot |85, and tends to force the member |13 50
in a clockwise direction about its pivot |14. This
movement is in a direction tending to rotate
the pin |01 and its corresponding shaft |05 in
a direction to disconnect the regulator circuit
breaker from the feeder circuit.
55
The arm or lever |90 extends through elon
gated slots |94 formed in the channel members
31 and projects outwardly from the outermost
channel member 31. At its extending end, the
lever |90 is pivoted by means of pin |95 to a 60
bell crank member |96 rotatably supported by
a pin |91 carried by a bifurcated support bracket
|98 secured to the flange of the channel 31. The
bell crank |96 has a socket portion 200 adapted
to receive an operating lever for rotating the 65
bell crank member about its pivot |91.
As clearly shown in Figure 9, the opposite arm
of the rocker or bell crank arm |96, indicated at
20|, is provided with a latching surface 202,
which is adapted to have corresponding engage 70
ment with a latching surface 203 carried by a
locking member 204 pivoted upon pin 205 sup
ported between the channel 31 and a bracket
member 206. The latch or locking member 204
extends through one side of the channel member 75
2,135,250
31, and has secured to its inner portion an angle
bracket 201 which has bearing engagement
against a leaf spring member 208 secured by
means of the block 209 to the inner surface of the
inner side of the channel member 31.
'
Considering now in detail the operation of the
left-hand draw bar member shown in Figure 10,
this draw bar member is indicated generally by
the reference numeral 212 having a handle por
tion 213 corresponding to the handle 142 of the
draw bar |00. A pair of channel members 211i
and 215 are secured to the outer surfaces of the
channel 31, and have secured thereon a face plate
member 216 corresponding to the member 140 of
Figures 8 and 9. Suitable flanges 211 and 218
define a channel for receiving one of the lug
members |60 of the main circuit breaker d5,
there being a stop member 219 disposed there
between at the upper portion thereof.
20
Disposed below the fiange 211 and in align
ment therewith is a second flange 220 carried
by an angle member 222 welded or otherwise
secured to the plate 21B. A plate member or
flange 223 is carried upon the upper surface of
7
beneath the lugs 160. Upon lowering of the lift
ing mechanism, the weight of the circuit breaker
is transferred through the supporting brackets
234 and 235 tothe channel member 224, as shown
in Figure 11.
^
The upper portion of the supporting bracket
235 is extended, as indicated at 238, and a cut
out portion indicated at 239 is provided which ex
tends about the outermost lug 160 and serves
to maintain this lug in a channel defined by the 1-0
flange 221 and the cut-out portion 239 of the
supporting bracket 235.
The lug carried by the
shaft S0 of the circuit breaker must be in a posi
tion corresponding to that shown in dotted lines
in Figure 8, before the circuit breaker can be
raised. ’ Otherwise, the draw bar 212 cannot be
drawn outwardly to allow the lugs 160 to pass
upwardly within channelsA 211 and 218, and
against channel 221. Thus the circuit breaker
45 cannot be raised unless it is in its disconnect
position.
The upper end of the bracket 235 is provided
with a pin member 240 which is adapted to en
gage within a slot carried in the end of a switch
a third channel member 224 secured between the , operating lever 242 carried by a switch mecha
channels 31, and one of its defining ends cooper
ates with the flange 220 to define a lower channel
for receiving the lug 160. A stop member 225,
corresponding to the stop member I 50 of Fig
30 ures 8 and v9, is provided upon the upper surface
of the angle bracket 22S. Spaced outwardly
from the flange 218 a distance corresponding sub
stantially to the distance between the lug inem
bers 160 is a flange member 221 forming a de
fining surface for the other of the lug members
160 disposed on this side of the circuit breaker
45. Correspondingly, a second angle member 223,
having the normally extending flange portion
229, is disposed on the plate 216 adjacent the
40 channel 215 and cooperates with a flange plate
230 carried on the upper surface of the channel
224 to define a channel opening for the second
lug member.
The draw bar member 212 is provided with an
intermediate supporting portion indicated gener
ally at 232, which is guided for movement within
brackets 233 carried by the plate 210. Support
ing and bearing brackets 234 and 235 are carried
by the draw bar member 232, and at their upper
ends have suitable bearing surfaces 236 cooper
atingwiththebearingsurfaces161 of the lugs` |60.
Outward movement of the draw bar 212 is pre
vented
abuttingbyagainst
the enlarged
the surface
portion
of the
or inner
member
side of
the flange 31 as indicated at 231.
Upon movement of the circuit breaker into
position within the cubicle opening, the lugs
160 ride along the upper surface of the angle
bracket 226, and are limited in their inward
60 movement by the lower depending portion of
the ñange 220 and the stop 225. Upon reaching
this position, with the draw bar pulled toI its
outermost position, as shown in Figure 10, the
lifting mechanism of the truck 92 is operated
to raise the lugs |60 between the flange 220 and
the end of the flange 223, and between the flange
229 and the end of the flange 230, upwardly into
the channel deñned by the flanges 211 and 218,
and into engagement with the channel defining
surface of the flange 221. Upon the lifting
mechanism being operated to raise the lugs up
wardly to an extent sufficiently so that the in
nermost lug |60 engages the stop 219, the draw
bar 2112 is then pushed inwardly, and moves the
75 supporting brackets A2311 and 235 into position
25
nisin indicated generally at 233. The auxiliary
switch indicated at 243 has electrical connection
through the conduit 244 to the main control panel
or switchboard, being in series with the circuit
breaker operating circuit, and prevents closing 30
of the circuit breaker into the feeder circuit un
til the draw bar 212 is moved inwardly locking
the circuit breaker in position. As long as the
draw bar remains in the position shown in Figure
l0, the operating mechanism in the control panel 35
is inoperative to connect the main bus circuit
breaker into the feeder circuit, due to the position
of the auxiliary switch 243.
Considering now the operation of the mecha
nism, assuming that both the regulator circuit 40
breaker and the main circuit breaker are in raised
position and connected into the feeder circuits.
whereby the main bus is feeding through the
main circuit breakers and through the regulator
circuit breakers, current transformers and in 45
duction regulators to the feeder circuits. The
lug 82 carried by the shaft 80 of the main cir
cuit breaker is then in the position shown in full
lines in Figure 8. If it is desired to remove the
main circuit breaker, or to lower the regulator 150
circuit breaker for inspection, servicing or repair,
the equipment at the control panel is operated
to disconnect the main circuit breaker from con
nection in the feeder circuit. The auxiliary
switch 243 is in position allowing the circuit 55
connections of the breaker to be opened.
This operation is subsequent to connection of
the transfer circuit breaker into the feeder `cir
cuit and the energization of the transfer bus for
maintaining the service on the feeder circuit 60
uninterrupted during this inspection or servicing
o_f the main bus connection. Upon disconnect
ing the main circuit breaker at the control panel,
the shaft 80 is rotated, bringing the lug 82 into
the position shown in dotted lines` in Figure 8. 65
Previous to this disconnection, the lug 82 was
in such position that it had bearing engagement
at one end against the upper end 110 of the
bracket 158, and on its other end had bearing
engagement with the angle bracket 201 of the 70
lock member 204, maintaining the lock member
in the position shown in Figure 8 and prevent
ing any clockwise rotation of the same tending
to disengage the locking engagement between
the surfaces 203 and 202.
The rocker arm 196 75
2,135,250
8
is thus maintained in the position shown in Fig
ure 8, and through the linkage mechanism |90,
50€, VIS and |23, holds the pin |01 in position
to maintain the regulator circuit breaker in con
nected position.
Thereupon, by rotating the shaft 80, effected
by disconnection of the circuit breaker from the
feeder circuit by the control switch at the switch
board, the lug 82 is rotated to release its bearing
10 engagement with the bracket 20T. The main
breaker is at this time disconnected from the
circuit, and has ruptured the circuit, so that
current from the main bus is not being trans
mitted through the regulator circuit breaker.
Thereupon, by pulling the latching lever 204
15
downwardly, the latching engagement with the
rocker arm |95 is released due to the fact that
the bracket 20E is moved inwardly with respect
to the lug 82, since the lug has been rotated out
20 of locking position, and consequently the rocker
arm |84 is rotated in a counterclockwise direc
tion by means of the spring |92, which forces
the member |73 in a clockwise direction, and
moves the pin |07 to the position shown in Fig
ure 9, which cuts the regulator circuit breaker
out of circuit connection, and also effects dis
engagement between the offset boss |15 and the
plate member |16.
Previous to this movement of the lever |90,
30 the portion |25 of the member |13 prevented
outward withdrawal of the latching bar |40, and
thus prevented any movement or" the support
ing brackets I6? and |08. However, with the
main circuit breaker disconnected, and with the
35 regulator circuit breaker disconnected by release
of the locking engagement between member 204
and rock shaft |95, the draw bar |40 is now
free to move outwardly. The lift truck is put
in position, and the hoisting mechanism there
of raised to engage in the sockets 89 carried
by the main circuit breaker 45. Upon further
raising of the circuit breaker by the hoisting
mechanism, the weight of the circuit breaker is
taken ofi of the supporting brackets |61, |58,
45 234 and 285, and consequently the left-hand draw
bar 2|2, and the right-hand draw bar |40, can
be withdrawn outwardly with respect to the
cubicle.
rI‘he outer position of these draw bars is indi
cated in Figures 9 and i0. Thereafter, upon
50 lowering of the lifting mechanism of the truck
55
until the ears 80 are released from the sockets
88 and the truck then removed from the cubicle.
Since the main circuit breaker is out of en
gagement with any of the frame members, it
can then be removed outwardly of the cubicle
by rolling the truck 92 outwardly, and is auto
matically uncoupled from the regulator cradle
frame.
In its lowered position, the regulator circuit
breaker is so positioned that its disconnect ter
minals 52 are disposed a suiiicient distance below
the terminal contacts 53 to provide for inspection
and servicing of the same, and to provide for
inspection and servicing of the regulator breaker
or any of its component parts. Meanwhile, the
main circuit breaker can be serviced exteriorly
of the cubicle.
In order to reassemble the equipment, the
truck with the main circuit breaker carried
thereby is rolled into the end of the cubicle, and
is positioned therein so that the lugs |50, carried
by the brackets 13 thereof, abut against stop
members |50, |63, 225 and 220, which aligns these
lugs for vertical movement within the latching
mechanism. At the same time, the extending
shoulder portions 85 of the bracket arms 84 ex 30
tend under the channel |23 of the regulator
breaker cradle with clearance between the top
face of shoulder 85 and lower face of ñange of
channel |23. Upon upward movement of the
hoisting mechanism, the main circuit breaker is 35
moved upwardly until the shoulder 85 engages
with channel |23 and a further movement then
causes the regulator cradle to also move upwardly
until the camming ears |34 of the arms 85 engage
the cam plates |3| and thereby force the latching 40
ears |35 over the top of the channel |23. In this
manner, the main circuit breaker and the regula
tor circuit breaker are raised into connect posi
tion with respect to the terminals 43, 4'| and 53.
Upward movement of the main circuit breaker „
is limited by means of the stops 2 | 9 and |53, and
when the main circuit breaker reaches this posi
tion, the contacts are fully engaged for both the
regulator circuit breaker and the main circuit
breaker. When the main circuit breaker is so ,
positioned, the latching bars 2|2 and |40 are
S2, the circuit breaker lugs |60 slide downwardly
moved inwardly, disposing the bearing portions
within the channels formed by the ñanges car
ried by the facing plates |40 and 2|0, and are
moved into the position shown in dotted lines
235 beneath the bea-ring surfaces |6| of the lugs .
in Figure 9.
At the same time, due to the cou
pling engagement between the bracket 83 and
the channel |23 of the regulator cradle frame,
lowering of the main circuit breaker 45 also
60 lowers the regulator circuit breaker 50. Just
before the regulator circuit breaker 50 reaches
its lowermost position, as determined by the stop
H5, the latching ears or lugs |34 of the arms
S5 ride oir" of the lower end of the cam plates
65 I3| secured to the channel 3T at either side of
the bowed channel |23 of the regulator frame
cradle. This allows the latching members 8E
to be rotated into the position shown in Figure 4,
70
breaker can be lowered until the lugs |60 bear
on the top ñange of angle |49 of the cubicle
frame. The breaker can then be leit supported
in this position, the hoisting mechanism lowered
by means of the spring |30, and permits a fur
ther lowering of the main circuit breaker until
it is out of engagement with any of the -frame
members when it can be removed from the cubicle
by rolling the truck 92 outwardly, and the breaker
is automatically uncoupled from the cradle of
If desired, the main
75 the regulator breaker.
|59 of the supporting brackets |61 and |68 and
the bearing portions 235 of the brackets 234 and
|80. Thereafter, upon lowering of the lifting
mechanism of the truck, the circuit breaker is
carried upon the bearing supports and is securely
latched to the frame, and, by reason of the cou
pling engagement, supports the regulator breaker
in connected position.
With the draw bar 2 I2 moved inwardly the aux
iliary switch 243 is closed, which permits the elec
trical operation oí the main circuit breaker by the
control switch on the control panel.
It should be remembered that up to this point
both the main circuit breaker and the regulator
circuit breaker are in their switch open positions.
In order to again cut the regulators into the cir
cuit, both of these switches must be closed. The
regulator breaker must be closed first by insert
ing a suitable handle Within the socket 200 and
rotating the bell crank |96 about the pivot |91 to
cause the member |13 to rotate in a counter
clockwise direction as viewed in Figure 9. The
2,135,250
pin |fi'l, being previously engaged with the forked
arm |72 when the breakers were raised to their
connected position, will then rotate in a clock
wise direction, as viewed in Figure 6, and cause
the regulator breaker to move to its switch closed
position. When the regulator breaker is com
pletely closed the latch 2M engages with the cam
surface
of the arm fill on bell crank |96 and
is thereby locked in its switch closed position.
10 This latching engagement is maintained by means
of the spring member 258 and the normal biasing
of the regulator breaker towards its switch open
position.
The main circuit breaker may now be operated
to its switch closed position by the control switch
on the control panel. Closing of this switch ro
tates the camming lug 82 to the position shown in
full lines in Figure 8, whereby the right-hand
9
of a smaller interrupting capacity than that of
the main circuit breaker, but the regulator break
er must, of course, have a voltage and current
rating at least equivalent to the requirements of
the feeder circuit. Furthermore, the regulator
breaker cannot be closed unless the main circuit
breaker is open.
I have also provided an interlocking mechanism
for the main and transfer circuit breakers so that
these breakers cannot be removed from their
supported or switch operating position unless the
breakers are in their switch open position. Also
an auxiliary switch, indicated at 243 in Figure 10,
is provided for each of these breakers so that
when the draw bar to which the auxiliary switch
is connected is pulled out for the purpose of low
ering the breaker from its operating position, the
breaker cannot be closed by the control switch
draw bar |40 is prevented from outward move
ment due to the abutting engagement of the cam
ming lug fil! with the upper portion |10 of the
on the control panel.
bracket |03, and the regulator breaker cannot
movement of the main circuit breaker and the
regulator circuit breaker upon movement of the
Also I have provided for the conjoint vertical 20
be moved to its swit-ch open position while the
main breaker is in its switch closed position, due
to the abutting engagement of the angle bracket
Zûl against the camming lug 82 which thereby
prevents the release of the latch 204.
In the closing operations, it has just been
pointed out that the regulator breaker must be
closed first, then the main circuit breaker can be
closed. If the main breaker should be closed first
it will be found that it is then impossible to close
the regulator breaker. rl‘his can be explained by
referring to Figures 8 and 9. In Figure 9 the
manual operating mechanism of the regulator
necessary to work on the equipment or circuit so
breaker is shown in the switch open position and
disconnected.
held in this position by 'the spring |92 and the
latch
heid in the position shown by the spring
.Ruß pressing against the heel of the latch 204.
is also attached to the heel
40 The angle bracket
of the latch
close to the front of Contact of
the heel with the spring 258. Now, if the main
circuit breaker is closed first, the camming lug 8_2
would assume a position with respect to latch 201
as shown by
hibiting any
From Figure
be moved in
the full lines in Figure 8, this pro
clockwise movement of latch 204.
9 it is evident that latch 204 must
a clockwise direction in order for
arm 20| of the rocker arm |96 to pass by the arm
50 203’ of the latch Zilli so that face 202 will engage
with face
which is the relative position of
'these faces when the regulator circuit break-er is
in the closed position. Thus it is evident that
the regulator circuit breaker cannot be closed if
the main circuit breaker should happen to be
closed first.
An interlocking and supporting mechanism in
general similar to that of the main circuit breaker
¿55 is also provided for the transfer circuit breaker
60 $0 except that it is not necessary to interlock the
transfer breaker with the regulator breaker. In
the case of the transfer breaker 69, the interlock
ing
supporting structures consists of two
mechanisms
shown in Figure 10 except that
the auxiliary switch 'M3 and its connecting links
are omitted from one mechanism.
It is therefore apparent that I have provided
an interlocking means between the main circuit
breaker and the auxiliary regulator breaker
whereby the regulator breaker cannot open the
load current of the feeder circuit but that this
load current must first be interrupted by the
main circuit breaker. The regulator circuit
breaker is called upon to open only the charging
75 current of the regulators and can therefore be
main circuit breaker by the lifting mechanism of
the lift truck and have also provided a means
whereby the regulator breaker can be automati 25
cally disengaged from its manual operating mech
anism.V
Whether the breakers are in their raised or
lowered positions (connected and disconnected
positions, respectively) can be easily determined 30
by visual inspection, and when it is determined
that they are in their disconnected positions,
safety is assured to the repairman who finds it
I am aware that various modifications may be
made in certain details of construction shown and
described in the present invention, particularly
in regard to providing some form of internal
hoisting mechanism which will eliminate the use 40
of the lift type truck, and I do not therefore in
tend to be limited except as deñned by the spirit
and scope of the appended claims.
I claim:
1. In metal-clad switch gear of the class de 45
scribed, a main bus, a transfer bus, a feeder
circuit, means including a main circuit breaker
and a regulator circuit breaker for connecting
said main bus to said 4feeder circuit, and means
providing for conjoint vertical movement of said 50
regulator breaker and said main breaker.
2. In metal-clad switch gear of the class de
scribed, a feeder circuit for said switch gear in
cluding a main breaker and a regulator circuit
breaker, means providing for conjoint raising and 55
lowering of said regulator breaker into and out of
operative position upon raising and lowering of
said main breaker into and out of operative posi
tion, and means providing for release of said last
named means in lowered position of said main 60
breaker.
3. In metal-clad switch gear of the class de
scribed, a bus, a feeder circuit, a main circuit
breaker, means for guiding said breaker for ver
tical movement therein, a regulator circuit break 65
er, means providing for conjoint raising or lower
ing of said regulator breaker into or out of opera
tive position upon respective raising or lowering
of said main breaker into or out of operative 70
position to connect and disconnect said bus and
feeder circuit, and means providing for release
of said last-named means upon lowering of said
main breaker out of engagement with said guide
means.
75
i()
2,135,250
e. In metal-clad switch gear including a pair
of spaced channel members, a cradle frame ver
tically movable in said channels, a feeder circuit
including a regulator circuit breaker adapted to
be mounted on said frame and a main circuit
breaker supported by said switch gear, means pro
viding for raising or lowering of said main break
er to or from supported position, and coupling
means carried by said main breaker for effecting
10 conjoint movement of said regulator breaker upon
raising or lowering of said main breaker.
5. In metal-clad switch gear including a pair
of spaced channel members, a cradle frame ver
tically movable in said channels, stop means for
limiting lowering movement thereof, a feeder
circuit including a regulator circuit breaker
adapted to be mounted on said frame and a main
circuit breaker supported by said Switch gear,
means providing for raising or lowering of said
20 main breaker to or from supported position, and
coupling means carried by said main breaker for
effecting conjoint movement of said regulator
breaker upon raising or lowering of said main
breaker, and means for effecting release of said
coupling means upon lowering of said main
breaker beyond a predetermined position.
6. In combination, in switch gear of the class
les-crlbed, a feeder circuit including a main bus
circuit breaker and a regulator circuit breaker,
30 said breakers being vertically movable into and
out of operative position, manually operable
switching means for opening said regulator
breaker, means carried by said main breaker
preventing opening of said regulator breaker
said regulator breaker in Vertical alinement when
said breaker is raised to its switch operating po
sition.
10. In metal-clad switch gear of the class de
scribed, a main circuit breaker and a. regulator
circuit breaker connected between a main bus
and a feeder circuit, means for supporting said
main circuit breaker in operating position, means
carried by said main breaker for holding said
regulator breaker in operating position, manual
ly operable means for cutting said regulator
l()
breaker into and out of said circuit, remote con
trolled means for cutting said main breaker into
and out of said circuit, and means associated
with said manually operable means and en
gaging said main breaker for preventing cutting
out of said regulator breaker before said main
breaker is cut out and preventing cutting in of
said regulator breaker subsequent to cutting in of
20
said main breaker.
1l. In metal-clad switch gear of the class de
scribed, a main circuit breaker and a regulator
circuit breaker connected between a main bus
and a feeder circuit, means for supporting said
main circuit breaker in operating position, means 25
carried by said main breaker for holding said
regulator breaker in operating position, man
ually operable means for cutting said regulator
breaker into and out of said circuit, remote con
trolled means for cutting said main breaker into 30
and out of said circuit, and means associated
with said manually operable means and engaging
said main breaker for preventing cutting out of
said regulator breaker before said main breaker
35 prior to opening of said main breaker, sup
is cut out.
to said manually operable means for preventing
release of said supporting means prior to open
40 ing of said regulator breaker.
when in their operating positions, means for
raising said main circuit breaker to its oper 40
ating position, means for supporting said main
porting means for maintaining said main break
er in operative position, and means connected
'7. In combination, in a feeder circuit for switch
gear of the class described, a main circuit break
er, a regulator circuit breaker, a frame for said
regulator breaker having vertical sliding move
ment within said switch gear, coupling means
operable upon upward movement of said main
breaker into operative position to raise said
frame simultaneously to move said regulator
breaker into operative position, means for sup
porting said main circuit breaker in operative
position, and means associated with said regu
lator breaker preventing moving the same into
its switch closed position subsequent to move
ment of said main breaker into its switch closed
55
position.
8. In switch gear of the class described having
a feeder circuit, a regulator circuit breaker in
said circuit, said breaker having a supporting
head, a cradle for supporting said breaker in
60 cluding vertically extending channels, rollers
carried by said channels, a pair of vertical chan
nel columns in said switch gear receiving said
cradle and guiding -said rollers for vertical
movement therein, said rollers being offset with
respect to the axis of said columns to maintain
said regulator breaker in vertical alinement
throughout the said vertical movement.
9. In switch gear of the class described having
a feeder circuit, a regulator circuit breaker in
70 said circuit, said breaker having a supporting
head, a cradle for supporting said breaker in
cluding vertically extending channels, rollers
carried by said channels, a cradle for supporting
said breaker, and means for guiding said cradle
75 during vertical movement thereof to maintain
12. In metal-clad switch gear a main circuit
breaker and a regulator circuit breaker con
nected between a main bus and a feeder circuit
breaker, for raising and holding said regulator
breaker in its operating position, manually op
erable means for cutting, said regulator breaker
into and out of said circuit, means associated 45
with said manually operable means and engaging
with said main circuit breaker for preventing
cutting in of said regulator breaker after said
main breaker is cut in, and means preventing
cutting in of said main breaker until it is in its 50
operating position.
13. In metal-clad switch gear the combina
tion consisting of a housing, a main circuit
breaker disposed in one end of said housing, a
regulator circuit breaker disposed inwardly of 55
said main breaker within said housing, and a
coupling means between said main breaker and
said regulator breaker necessitating conjoint
movement therebetween said coupling means be
ing automatically engaged when the main break
er is raised and automatically disengaged 'when
the main breaker is lowered. ‘
14. In metal-clad switch gear the combination
consisting of a housing, a main circuit breaker
disposed in one end of said housing, a regulator 65
circuit breaker disposed inwardly of said main
breaker within said housing, and a transfer
breaker disposed in the opposite end of said
housing.
15. In metal-clad switch gear the combination 70
consisting of a housing, a main circuit breaker
disposed in one end of said housing, a transfer
circuit breaker disposed in the other end of said
housing, a regulator breaker disposed inwardly
of said housing adjacent said main breaker, re 75
11
2,135,250
leasable means for supporting said main breaker
in said housing, releasable means for supporting
said transfer breaker in said housing, means for
raising and lowering said main circuit breaker
and said transfer breaker within said housing, and
means for associating said regulator breaker with
said main breaker to provide for conjoint verti
cal movement of the main breaker and regulator
breaker.
16. In metal-clad switch gear, a main bus, a
feeder circuit, means for connecting said bus to
said circuit including a main circuit breaker and
a regulator circuit breaker, said breakers being
coupled together for conjoint vertical movement,
and means for releasing said coupling engage
ment only in lowermost position of said breakers.
17. In metal-clad switch gear, a main bus, a
means locking said breakers to said cubicle in
operative position including means determining
the sequence of opening and closing of said
breakers.
20. In metal-clad switch gear, a main bus, a
feeder circuit, means including a main circuit
breaker and a regulator circuit breaker for con
necting said bus to said circuit, and means car
ried by one of said breakers preventing independ
ent movement of either of said breakers into
and out of operative position.
21. In a switch gear cubicle having a main
bus and a feeder circuit, means for connecting
said bus to said circuit including a main breaker
and a regulator breaker, a supporting frame for 15
said main breaker movable vertically in said cu
bicle, and means carried by said frame auto
feeder circuit, means for connecting said bus to
said circuit including a main circuit breaker and
matically coupling said regulator breaker there
to when said frame is disposed in said cubicle
a regulator circuit breaker, a cubicle, means for
for vertical movement.
20
22. In metal-clad switch gear having a main
circuit breaker and a regulator circuit breaker
raising and lowering said main breaker in said
cubicle, a verticallymovable cradle for said regu
lator breaker, means coupling said cradle to said
main breaker upon vertical mov-ement of said
f main breaker, and means preventing disengage
ment of said coupling means except when said
main breaker is in lowermost position in said
cubicle.
.1.8. In combination, in a switch gear cubicle,
a main circuit breaker and a regulator breaker
coupled together for conjoint vertical movement
in said cubicle, and means preventing closing -of
either of said breakers unless said breakers are
locked in operative position with respect to said
cubicle.
19. In combination, in a switch gear cubicle,
a main circuit breaker, a regulator circuit break
er, means coupling said breakers together for
conjoint vertical movement in said cubicle, and
for connecting a bus to a feeder circuit, said
breakers being coupled for conjoint vertical
movement, means for locking said main breaker 25
in operative position, and switch means con
trolled by said locking means for preventing clos
oi said main breaker prior to locking of said
breaker in operative position.
23. In a switch gear cubicle, a main circuit 30
breaker and a regulator circuit breaker coupled
together for conjoint movement, means for lock
ing said breakers in operative position only when
said breakers are both in switch~open position,
and means carried by said main breaker prevent
ing release of said locking means unless both said
break-ers are in switch-open position.
FRED H. COLE.
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