Alternative power supply connection

• US 6,420,801 B1
• Filed: 04/11/2000
• Issued: 07/16/2002
• Est. Priority Date: 04/11/2000
• Status: Expired due to Fees

• Current Assignee: Electro Industries Company Limited
• Original Assignee: Electro Industries Company Limited
• Inventors: Seefeldt, William J.
• Primary Examiner(s): Tso, Edward H.
• Assistant Examiner(s): Tibbits, Pia
• Application Number:
  US09/547,233
• Time in Patent Office: 826 Days
• Field of Search: 307/64, 307/125
• US Class Current: 307/64
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems

Abstract

A connector and connection arrangement for connecting an alternative power supply to a user incoming electrical power center, commonly referred to as the load center or breaker panel, when power from a utility power source is not being received. The connection includes an individual housing for the connection to the alternative supply or the connection may be located in a common housing which houses both the connector and the utility meter. The alternative supply is connected to the load connected and load feeding side of the meter socket and is electrically positioned in front of the load circuit breaker panel which normally includes the individual service disconnects. The connection includes at least one and preferably a pair of open-center switches and a sensing circuit therefore to sense receipt or termination of utility power delivery to the user to actuate such switches and open the utility supply switch and close the switch to the alternative source only after two indications of power supply stoppage are determined. When utility power is restored, the alterative source is disconnected and the utility power is reconnected.

Claims

1. An electrical connection and transmission device for supplying power from an alternative power source to a load location in the instance and condition of utility power interruption, the utility power transmission system normally including a meter socket, a connection from the utility power to the meter socket and a connection from the meter socket to the load location, said connection and transmission device including;

a) a source of alternative power;

b) means connecting said alternative power source to the load location;

c) open center switch means between said meter and the load location and said alternative power source and the load location; and

,

d) a control link controlling said open center switch means to shift said switch means between positions of connecting said utility power source to the load location and connecting said alternative power source to the load location whereby utility power transmission is terminated and power from said alternative source is not deliverable to the utility power source and is only deliverable to the load location.

2. The electrical transmission and connection device as set forth in claim 1 and said control link requiring at least one utility power transmission cessation indication prior to shifting to said alternative power source transmission.

3. The electrical transmission and connection device as set forth in claim 1 and said control link requiring two utility power transmission cessation indications prior to shifting to said alternative power source transmission.

4. The electrical transmission and connection device as set forth in claims 1 wherein

a) said open center switch means includes a pair of open center switches, a first such switch arranged between said meter socket and the load location, the second such switch arranged between said alternative power source and the load location; and,

b) said control link controlling both such switches to shift said first switch to open position upon cessation of transmission of power from the utility power source and closing said second switch upon verification of cessation of transmission of power from the utility power source.

5. The electrical transmission and connection device as set forth in claim 4 wherein verification of cessation of transmission of power from the utility power source includes a first verification of cessation of transmission of power from the utility power source and a second verification of cessation of transmission of power from the utility power source available from the load location.

6. The electrical transmission and connection device as set forth in claim 5 wherein said second verification of cessation includes a visual indication of such cessation.

7. The electrical transmission and connection device as set forth in claim 5 wherein said second verification of cessation includes a non-visual indication of such cessation.

8. The electrical connection and transmission device as set forth in claim 4 wherein

a) the meter socket, said first of said switches and the connection from the meter socket to the load location is maintained in a first housing;

b) said second of said switches and the connection from said alternative power source to the load location is maintained in a second housing; and

,

c) said control link is selectively arranged in said first or second housing.

9. The electrical connection and transmission device as set forth in claim 4 wherein said pair of switches, the meter required connections to the utility and alternative power source are maintained in a single housing divided to provide two electrically distinct and isolated sections, a first of such sections including the meter and the first of said switches, the second of such sections including the second of said switches and said means for connecting said source of alternating power, said control link being arranged in a selected one of said section.

10. The electrical connection and transmission device as set forth in claim 8 and separate access panels provided in association with said single housing to allow selective access to each of said sections.

11. The electrical transmission and connection device as set forth in claim 1 and said control link including control means to activate said alternative power source for delivery of power therefrom.

12. The electrical transmission and connection device as set forth in claim 1 and said control link including:

a) means for continually sensing power transmission from said utility power source and sequentially shifting said open center switch to shift the same and disconnecting transmission from said alternative power source and connecting transmission form the utility power source upon sensing power delivery from the utility source.

13. A device for transferring power to a load between a utility power source and an alternative power source comprising:

a housing having a utility power side and an alternative power side;

a separater electrically isolating the utility power side from the alternative power side;

a meter socket located in the utility power side;

a first open-center switch located in the utility power side;

a second open-center switch located on the alternative power side; and

a control link coupled to the first open-center switch and the second open-center switch, operably configured such that one of the open center switches cannot be closed unless the other is open.