Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific transmission line
Patent
1975-06-26
1977-08-16
Miller, J D
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific transmission line
361118, H02H 722
Patent
active
040429695
ABSTRACT:
In an electric cable power transmission line of the class wherein three phase metal sheath single core power cable sections are interconnected by junction boxes, two sets of ordinary junction boxes at the opposite ends of each unit line section are grounded, two sets of junction boxes are provided in each unit line section, at each set of the insulating junction boxes the sheaths of the cables of one phase on one side of the insulating junction boxes are crossconnected by cross-connecting wires to the sheaths of the cables of another phase on the other side thereby forming three loop circuits each including the grounding connections of the ordinary junction boxes, the sheaths of the cable sections and the cross-connecting wires, saturable reactors are connected in series with only one or two of the loop circuits. This arrangement reduces the number of the saturable reactors and protective devices for corrosion preventing layers as well as the inductive interference to nearby communication lines.
REFERENCES:
patent: 514167 (1894-02-01), Tesla
patent: 1512443 (1924-10-01), Atkinson
patent: 1512444 (1924-10-01), Atkinson
patent: 1603875 (1926-10-01), Shanklin
patent: 2018241 (1935-10-01), Viele
patent: 3046422 (1962-07-01), Albright
patent: 3795820 (1974-03-01), Eidinger
patent: 3857071 (1974-12-01), Nikaido et al.
Fujiwara Yasutaka
Haga Kaoru
Nikaido Teruji
Miller J D
Salce Patrick R.
Showa Electric Wire & Cable Co. Ltd.
Tokyo Electric Power Co. Ltd.
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