Feeding pass switching circuit

Details Feeding pass switching circuit Feeding pass switching circuit

1996-12-18

1998-08-04

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361187, 361191, 361210, 307127, H02H 300

Patent

active

057903581

ABSTRACT:
When a trouble occurs in a cable, a feeding pass for another cable is ensured. In a feeding pass switching circuit, optical fibers are respectively connected to the terminals A, B and C. When a negative current is applied to the system in a state where a BRANCH2 is put in an open circuit and a TRUNK is grounded, a relay K1 is activated, and then a relay K2 is activated. Successively, when a positive current is supplied from the TRUNK, a cable connected to the TRUNK and a BRANCH1 is fed from both terminals. When the positive current is supplied from the BRANCH1 in a state where the TRUNK is put in a open circuit and the BRANCH2 is grounded, a relay K3 is activated. Successively, when the negative current is supplied to the BRANCH2, a relay K5 is activated. In such a manner, the power is fed to each feeding pass from one terminal.

REFERENCES:
patent: 5334879 (1994-08-01), Inoue et al.

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