Cover plate terminal assembly for a transfer switch

• US 6,365,990 B2
• Filed: 06/21/1999
• Issued: 04/02/2002
• Est. Priority Date: 06/21/1999
• Status: Expired due to Fees

• Current Assignee: Reliance Controls Corporation
• Original Assignee: Reliance Controls Corporation
• Inventors: Flegel, David D.
• Primary Examiner(s): Ballato, Josie
• Assistant Examiner(s): POLK, SHARON A
• Application Number:
  US09/336,900
• Publication Number:
  US 20020000757A1
• Time in Patent Office: 1,016 Days
• Field of Search: 307/30, 307/64, 361/643, 361/644, 361/652, 361/641
• US Class Current: 307/64
• CPC Class Codes: H01H 1/58 Electric connections to or between contacts; Terminals for high tension switches H01H33/025; for electromagnetic relays H01H50/14; for circuit breakers H01H71/08
• CPC Class Codes: H01H 2300/018 Application transfer; between utility and emergency power supply
• CPC Class Codes: H02G 3/14 Fastening of cover or lid to box

Abstract

A power transfer device having various electrical components adapted for interconnection with the electrical system of a building includes a cabinet having a face plate provided with a socket opening which normally accommodates a power input receptacle adapted to receive a plug connector electrically connected to a generator. The power transfer device includes an internal compartment defined by the cabinet, and a set of connections corresponding to the electrical components located within the internal compartment. A cover plate terminal assembly is removably connected to the face plate for covering the socket opening to prevent access to the internal compartment and for providing a direct, permanently wired power input arrangement rather than a plug-type power input via a power input receptacle. The cover plate terminal assembly is also electrically interconnected with the electrical component connections in the internal compartment.

Claims

1. In a power transfer arrangement for supplying power from a generator to the electrical system of a building, the power transfer arrangement having a power transfer device adapted for interconnection with the building electrical system and including a cabinet having a wall structure and a face plate provided with a socket opening for accommodating a socket-type power input receptacle, the improvement comprising:

a terminal arrangement in the power transfer device; and

a cover engageable with the face plate for covering the socket opening and preventing access to the terminal arrangement, the socket cover being connected with the terminal arrangement for enabling power to be transferred from the generator to the various other electrical components of the power transfer device.

2. The improvement of claim 1, wherein the electrical components of the power transfer device include a set of switches mounted to the wall structure for controlling the supply of power from the power transfer device to the building electrical system.

3. The improvement of claim 2, wherein the terminal arrangement further includes a set of power input terminals for establishing a non-plug-type electrical connection between the power transfer device and a power inlet arrangement interconnected with the generator, wherein the power input terminals are located within an internal compartment defined by the cabinet at a location spaced from the set of switches.

4. The improvement of claim 3, wherein the electrical components include a set of circuit breakers, there being one circuit breaker associated with each of the switches.

5. The improvement of claim 4, wherein the electrical components further include a pair of watt meters for displaying the amount of power provided by the generator.

6. The improvement of claim 5, wherein the electrical components include an output receptacle for selectively delivering generator power to an electrical load plugged therein.

7. The improvement of claim 6, wherein the terminal arrangement is constructed and arranged to interconnect the switches, the watt meters, the circuit breakers and the power output receptacle.

8. The improvement of claim 5, wherein the terminal arrangement further includes a set of power input conductors connected to the power input terminals.

9. The improvement of claim 8, wherein a first conductor extends between the terminal arrangement and the one of the watt meters, a second conductor extends between the terminal arrangement and the output receptacle, a third conductor extends between the terminal arrangement and the other watt meter, and a fourth conductor extends between the terminal arrangement and the wall structure.

10. In a power transfer device adapted for interconnection with the electrical system of a building, and including a cabinet having a face plate provided with an opening for accommodating a power input receptacle adapted to receive a plug connector electrically connected to a generator, the improvement comprising:

an internal compartment defined by the cabinet, a set of connections associated with the electrical components located within the internal compartment and a cover plate terminal assembly removably connected to the face plate and covering the opening to prevent access to the internal compartment, the cover plate terminal assembly also being electrically interconnected with the connections in the internal compartment such that electrical power is adapted to be selectively transferred from the generator to the electrical components.

11. The improvement of claim 10, wherein the cover plate terminal assembly includes a cover plate, a terminal connector and spacing structure interposed between the cover plate and the terminal connector for spacing the terminal connector from the cover plate.

12. The improvement of claim 11, wherein the spacing structure comprises a Z-shaped bracket having a first end portion fixed to the face plate, a rearwardly extending portion joined to the first end portion and a second end portion fixed to the terminal connector by a pair of fasteners passed through the terminal connector and threaded into the second end portion.

13. The improvement of claim 11, wherein the face plate is formed with a set of apertures located around the socket opening, the cover plate is formed with a set of through holes which are aligned with the face plate apertures, and fasteners extend through the apertures and are screw threaded into the through holes to fix the cover plate terminal assembly relative to the face plate.

14. A method for constructing a power transfer device having various electrical components for supplying power from a generator in electrical communication with a separate power inlet arrangement to the electrical system of a building, the method comprising the steps of:

providing a cabinet defining an internal compartment within which a set of connections for the electrical components are located;

forming the cabinet with wall structure and a face plate having an opening formed therein; and

mounting a cover having a terminal connector over the opening and against the face plate wall structure for preventing access to the internal compartment and for receiving power input wiring, wherein the terminal connector is interconnected with the set of electrical component connectors such that electrical power is selectively transferred from the generator to the electrical components of the power transfer device through the terminal connector.

15. A power transfer device having electrical components for supplying power from a generator in electrical communication with a separate power inlet arrangement to the electrical system of a building, the power transfer device comprising:

a cabinet defining an internal compartment within which a set of connections corresponding to the electrical components is located, the cabinet having wall structure and a face plate provided with an opening formed therein; and

a cover mounted against the face plate over the opening and having a terminal connector connected to the cover for preventing access to the terminal compartment and electrically interconnected with the set of connections such that electrical power is selectively transferred from the generator to the building electrical system.