Power distribution system with circuit breakers remotely resettable by signals transmitted over the power lines

• US 6,084,758 A
• Filed: 10/26/1998
• Issued: 07/04/2000
• Est. Priority Date: 10/26/1998
• Status: Expired due to Term

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: Clarey, Robert J., Engel, Joseph Charles
• Primary Examiner(s): Leja, Ronald W.
• Application Number:
  US09/179,142
• Time in Patent Office: 617 Days
• Field of Search: 361/42-50, 361/62-69
• US Class Current: 361/62
• CPC Class Codes: H02H 1/0076 by superposition on the watched current
• CPC Class Codes: H02H 3/063 Details concerning the co-operation of many similar arrangements, e.g. in a network sectionalised protection H02H7/26
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 13/00036 the elements or equipment being or involving switches, relays or circuit breakers circuits for indication of single switches H01H9/167
• CPC Class Codes: H02J 13/0004 involved in a protection system
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/20 using protection elements, arrangements or systems
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission

Abstract

Circuit breakers in an electric power distribution system, such as in a residence or a light commercial facility, are remotely reclosed using a power line communications system such as an X10 or CEBus system, which transmits a reclose signal over the power conductors to a recloser controlling the separable contacts of the circuit breaker in the load center. A remote master unit which generates the reclose signal is connected to an unaffected branch circuit, preferably by plugging into a receptacle located in a convenient part of the house or office remote from the load center. The reclosers may be addressed individually or globally.

Claims

1. An electric power distribution system comprising:

a network of power conductors forming a plurality of branch circuits connected to a main circuit;

at least one remotely reclosable circuit breaker comprising;

a set of separable contacts connected in power conductors of one of said branch circuits adjacent to said main circuit; and

operating means comprising trip means opening said separable contacts to disconnect said one branch circuit downstream of said separable contacts from said main circuit, and reclose means connected for energization to said power conductors upstream of said separable contacts and responsive to a remote reclose signal to reclose said separable contacts; and

at least one other circuit breaker connected in at least one other branch circuit; and

remote means connected to said network of power conductors through said at least one other branch circuit downstream of said at least one other circuit breaker for transmitting said remote reclose signal to said reclose means over said network of power conductors through said at least one other circuit breaker.

2. The system of claim 1 wherein said at least one other branch circuit includes a receptacle downstream of said at least one other circuit breaker and wherein said remote means plugs into said receptacle.

3. The system of claim 1 wherein said remote means comprises X10 communications means.

4. The system of claim 1 wherein said remote means comprises CEBus communications means.

5. The system of claim 1 wherein said at least one other circuit breaker comprises remotely reclosable circuit breakers in a number of said plurality of said branch circuits adjacent said main circuit, and wherein said remote means is connected in a selected branch circuit downstream of the remotely reclosable circuit breaker in the selected branch circuit.

6. The system of claim 1 wherein said at least one other circuit breaker comprises remotely reclosable circuit breakers in a number of said plurality of said branch circuits adjacent said main circuit and wherein said remote means is selectively connectable in any of said plurality of said branch circuits.

7. The system of claim 6 wherein said plurality of said branch circuits include receptacles downstream of the remotely reclosable circuit breakers and wherein said remote means has a plug insertable in any of said receptacles.

8. The system of claim 6 wherein said reclose means of said remotely recloseable circuit breakers comprises a reclose actuator and addressable communication means having an assigned address and responsive to a remote reclose signal containing the assigned address to actuate said reclose actuator, said remote means transmitting said reclose signal with the assigned address of a selected remotely recloseable circuit breaker.

9. The system of claim 8 wherein said addressable communication means is also responsive to a reclose signal with a global address, and said remote means selectively transmits said reclose signal with said global address.

10. The system of claim 9 wherein said branch circuits include receptacles and said remote means includes a plug insertable in a receptacle in a selected branch circuit.

11. The system of claim 10 wherein all of said remotely recloseable circuit breakers are housed in a load center and wherein said receptacles are located in said priority of said branch circuits remote from said load center.

12. The system of claim 5, wherein said trip means of said remotely recloseable circuit breakers include thermal-magnetic trip means and electronic trip means.

13. The system of claim 12 wherein said electronic trip means comprise at least one of an arc fault detector and a ground fault detector.