Status-indicating current interrupter

• US 4,604,613 A
• Filed: 06/18/1984
• Issued: 08/05/1986
• Est. Priority Date: 06/18/1984
• Status: Expired due to Fees

• Current Assignee: Hoenix Electric Corporation
• Original Assignee: Phoenix Electric Co., Ltd.
• Inventors: Clark, Thomas F.
• Primary Examiner(s): Rowland, James L.
• Assistant Examiner(s): Hofsass, Jeffery A.
• Application Number:
  US06/621,540
• Time in Patent Office: 778 Days
• Field of Search: 340/644, 340/619, 340/638, 250/227
• US Class Current: 340/638
• CPC Class Codes: G01R 19/15 Indicating the presence of current
• CPC Class Codes: G08B 29/02 Monitoring continuously signalling or alarm systems
• CPC Class Codes: H01H 85/30 Means for indicating condition of fuse structurally associated with the fuse
• CPC Class Codes: H01H 9/168 making use of an electromagnetic wave communication

Abstract

A high voltage current interrupter has integral therewith a fiber optic cable extending into the housing for carrying a failure-indication signal back to a remote monitor station when current flow through the interrupter is interrupted. In the preferred embodiment described herein, the optical cable extends continuously between optical input and output ports of the current interrupter and carries a monitor signal which is continuously present during normal operation. When a fault current occurs, the cable is explosively severed to interrupt the monitor signal and thereby provide a fault indication signal to the monitoring station.

Claims

1. A high voltage current limiter providing an indication of current flow therethrough, comprisng a housing enclosing an interruptable current path extending therethrough, a continuous path of fiber optic cable extending through said housing between an input port and an output port thereof and providing a continuous optical transmission path between said ports for carrying an optical signal indicative of the status of current flow through said current path, and an explosive charge for severing said cable on interruption of current flow through said current path means for establishing a failure-indicating signal on said light path on interruption of current flow through said current path.

2. A current interrupter according to claim 1 in which said explosive charge is positioned to sever said cable concurrently with the current path.

3. A current interrupter providing an indication at a remote location of the status of current flow therethrough, said interrupter comprising a housing enclosing a current path extending therethrough, a fiber optic cable having a loop extending through said housing between an input port and an output port thereof for carrying a monitoring signal from a remote source, through the housing, and back to the remote source as long as said cable is intact, and an explosive charge for severing said cable concurrently with interruption of current flow through said current path to interrupt said monitor signal and thereby provide an indication of current interruption through said current path.

4. A current interrupter according to claim 3 in which said explosive charge is positioned to sever both said cabel and said current path.

5. A current interrupter providing an indication of the status of current flow therethrough, comprising a housing enclosing a current path extending therethrough, a continuous loop of fiber optic cable extending between an input port and an output port of said housing for carrying a continuous optical signal therethrough for transmission to a remote location and indicative of the status of current flow through said current path, the fiber optic cable being severable on interruption of current flow through said current path, and means for explosively severing said fiber optic cable on interruption of current flow through said current path to thereby provide a failure signal to said remote location.

6. A high voltage current limiter providing an indication of current flow therethrough, comprising a housing enclosing an interruptable path extending therethrough and having an input port and an output port means, including fiber optic cable extending through said housing for defining a light path extending between the input port and the output port for carrying an optical signal indicative of the status of current flow through said current path, and an explosive charge for interrupting said light path on interruption of current flow through said current path to establish a failure-indication signal.

7. A current interrupter according to claim 6 in which said explosive charge is positioned to interrupt said light path concurrently with interruption of current flow through said current path.

8. A current interrupter according to claim 7 in which the explosive charge is positioned to interrupt both said current path and said light path.

9. A current interrupter providing an indication at a remote location of the status of current flow therethrough, said interrupter comprising a housing enclosing a current path extending therethrough and having an input port and an output port, means defining a light path extending through said housing from the input port to the output port, fiber optic cable for carrying a monitoring signal from a remote source, through the input port, and back through the output port to the remote source as long as said light path is not interrupted, and an explosive charge for interrupting said light path to interrupt said monitor signal and thereby providing an indication of current interruption through said current path.

10. A current interrupter according to claim 9 in which said explosive charge is positioned to interrupt said light path concurrently with interruption of current flow through said current path.

11. A current interrupter according to claim 10 in which said explosive chagre is positioned to interrupt both said cable and said current path.