Dec. 17, 1946. Q E_ BENNETT 2,412,556 ELECTRIC POWER DISTRIBUTION SYSTEM Filed Aug. 5, 1944 -—mv /}<\\\w//\\w///\\/ /44m4/4AA ,3 1 2r '4 //A\\\)’//k 7 AW A“ ‘ 2 M4444 INVENTOR 65 BY ATTORNEYb - Patented Dec. 17, 1946 ~ . . . 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.