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Dec. 17, 1946.
Q E_ BENNETT
2,412,556
ELECTRIC POWER DISTRIBUTION SYSTEM
Filed Aug. 5, 1944
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INVENTOR
65
BY
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Patented Dec. 17, 1946
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2,412,556
.
UNITED STATES PATENT OFFICE
2,412,556
ELECTRIC POWER DISTRIBUTION
YSTEM
Charles E. Bennett, Ridgewood, N. J., assignor to
The Okonite-Callender Cable Company, Incor
porated, Paterson, N. J., a corporation of New
Jersey
Application August 5, 1944, Serial No. 548,273
4 Claims.
(Cl. 200—113)
1
2
This invention is in general directed to electric
power distribution systems of the type wherein
the cables of the system are disposed in pipe lines
?lled with oil under pressure and buried in the
Normally the pipe lines I and 2, the manifold
4 and the enclosing housing 9 are kept ?lled with
oil under superatmospheric static pressure of
from 150 to 200 pounds per square inch.
Should one of the high voltage fuses ‘I blow,
the valve I3 in the pipe I2 is opened relieving
ground, the present invention relating primarily
to fuse blocks or fuse structures for such systems.
More speci?cally the present invention pro
the pressure in the housing 9. The cover I l is
then removed and the blown fuse replaced. After
without the necessity of opening the line and
the cover II has been sealed in position again
without lowering the pressure in the system, and 10 the oil in the housing 9, should the same have
oil which has been carbonized due to a fuse blow
become contaminated by the blowing of the fuse,
ing does not come in contact with the main body
may be drained off through the drain l4, where»
of oil in the system and can readily be drained off.
upon with the valve l3 open the housing 9 is
In the accompanying drawing:
allowed to ?ll up again through the small ori?ce
Fig. 1 is a sectional elevational view of an em 15 IT in the manifold 4, or by unseating the check
vides:
For the replacement of a blown fuse
bodiment of my invention; and
‘
valve 8 by the stem IE, or both. After the hous
Fig. 2 is a section on the line 2—2 of Fig. 1.
ing has ?lled the valves l3 and 8 are closed and
Referring to the drawing in detail: I and 2
the circuit is again in normal operating condition.
designate the pipe lines enclosing the conductors
If desired the housing 9 may be provided inter
3 of a distribution system of the type above re 20 nally with barriers [8 of Bakelite or any other
ferred to. The pipes I and 2 are maintained
suitable insulating material to facilitate the re
?lled with oil at a high static pressure, say from
moval of a blown fuse and replacement with a
one hundred and ?fty to two hundred pounds
new one while the other circuit-s of the system
per square inch. The conductor-s 3 are insulated
are alive.
with the usual paper insulation, for example, but 25 It will be seen from the foregoing that the
the usual lead sheath is omitted. In other words,
present invention provides a very simple con
the insulated but unsheathed conductors simply
struction by which a fuse in a cable system of
lie loosely in the oil with which the pipe lines are
the type hereinbefore referred to may be replaced
?lled.
with ease and facility and while the system is
Across the adjacent ends of the pipe lines I
alive. It is to be understood that the details of
and 2 is a closed manifold 4, and projecting
construction which I have shown and described
through the top of this manifold are pairs of
may be changed without departing from the
bushings or insulating terminals 5, through which
spirit and scope of my invention.
extend the fuse terminals 6, to which are at
What I claim is:
tached the adjacent ends of two cable lengths, as
1. A fuse structure for electric cables of the
will be understood. The fuse terminals may be
type wherein the insulated unsheathed cables are
attached to the cables in any suitable fashion.
immersed in oil under pressure contained in a
‘I designates a fuse bridging each pair of fuse
pipe line, said fuse structure comprising in com
terminals.
bination a manifold communicating with the
One end of the manifold 4 is provided with a 40 pipe line and adapted to connect the adjacent
check valve 8 adapted to be unseated by move
ends of two lengths of the pipe line to each other,
ment toward the manifold from the exterior of
fuse terminals mounted on said manifold and
the manifold, as will be brought out hereinafter.
extending thereinto for attachment to the cable
Enclosing the manifold 4 is a closed housing 9
conductors, a fuse mounted across said terminals
located in the ground in a handhole Ill. The
externally of said manifold, a housing enclosing
enclosing housing 9 is provided with a removable
said manifold, terminals and fuse, and adapted
cover plate It accessible from the top of the
to be ?lled with oil from the manifold, and a re
handhole, this plate being bolted sealed. l2 des
movable cover plate for said casing providing
ignates a pressure reliief pipe for the housing 9,
access to said fuse from the exterior of said
this pipe being controlled by a valve l3. The 50 casing.
bottom of the housing 9 is provided with a drain
2. In combination a pair of juxtaposed pipe
l4 adapted to be closed by a plug l5.
line sections, a manifold connecting the pipe line
Projecting into the interior of the housing 9
sections to each other, an insulated cable con
from the exterior thereof is a screw stem I 6 pro
ductor in each pipe line section extending into
vided for unseating the check valve 8.
55 said manifold, a pair of fuse terminals mounted
3
4
0n and extending into said manifold and con
nected to the ends of said cables, a demountable
from each other, said pipe line, sections, manifold
and housing communicating with each other and
fuse out-side said manifold bridging said termi
nals, a closed housing enclosing said manifold, a
removable cover for said housing permitting of
access to said fuse from the exterior of the hous
ing, said pipe line sections, manifold and housing
communicating with each other and containing
oil under high pressure.
containing oil under high pressure, and a remov
able cover for the housing to permit of access to
any of said fuses from the exterior of the housing.
4. In combination a pair of adjacent pipe line
sections, a manifold connecting the pipe line sec
tions to each other and in communication there
with, an insulated cable conductor in each pipe
3. In combination a pair of adjacent pipe line 10 line section extending into said manifold, a pair
sections, a manifold connecting the pipe line sec
tions to each other, insulated cable conductors
in each pipe line section extending into said
manifold, pairs of fuse terminals mounted on
and extending into said manifold, one terminal 15
of fuse terminals mounted on and extending into
said manifold where they are connected to the
ends of said cable conductors, a fuse outside said
manifold bridging said terminals, a closed hous
ing enclosing said manifold, a removable cover
for said housing permitting of access to .said fuse,
a drain for said housing, said pipe lines, manifold
of each pair being connected to the end of one
of said cable conductors, the other terminal of
the pair being connected to the corresponding
and housing containing oil under high pressure,
cable conductor in the other pipe line section, a
and’a valve in the manifold adapted to be un
demountable fuse bridging each pair of fuse ter 20 seated from the exterior of said housing for per
minals externally of the manifold, an enclosing
mitting the housing to be re?lled from the mani
housing for the manifold, fuse terminals and
fold and pipe line sections.
'fuses, partitions of insulating material in the
housing separating the pairs of fuse terminals
CHARLES E. BENNETT.
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