Load management apparatus

• US 4,178,572 A
• Filed: 04/03/1978
• Issued: 12/11/1979
• Est. Priority Date: 04/03/1978
• Status: Expired due to Term

• Current Assignee: Southern California Edison Company (Edison International)
• Original Assignee: Gould, Inc. (Transdigm Group Incorporated)
• Inventors: Horn, John, Gaskill, George
• Primary Examiner(s): Broome, Harold
• Application Number:
  US05/893,209
• Time in Patent Office: 617 Days
• Field of Search: 335/6, 335/14, 335/20, 335/8, 335/9, 335/10, 307/38, 307/39, 307/40, 219/327
• US Class Current: 335/14
• CPC Class Codes: H01H 89/06 Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device

Abstract

Load management apparatus constituting a direct replacement for a conventional molded case circuit breaker consists of half-inch wide switching and management modules connected in series between an electrical load and its energizing source. The switching module is a conventional circuit breaker and the management module includes an electro-magnetic contactor. The latter is operated by an overcenter spring mechanism which in turn is operated by remotely controlled solenoids.

Claims

1. Load management apparatus including a manually operable switching section and a remotely operable management section;

said switching section including interrupter contact means, a manually operable spring powered first mechanism connected to said interrupter contact means for opening and closing thereof, fault responsive trip means operatively connected to said first mechanism to operate the latter for opening of said interrupter contact means upon the occurence of predetermined fault currents at said switching section;

said management section including main contact means connected in series circuit with said interrupter contact means and an electrical load energized through said apparatus, a spring powered second mechanism connected to said main contact means for opening and closing thereof, remotely controlled electrically powered operator means operatively connected to said second mechanism for selectively operating the latter to open and close said main contact means.

2. Load management apparatus as set forth in claim 1 also including first and second main terminals, conductor means defining a main series circuit extending between said terminals;

said series circuit including said interrupter and said main contact means;

said series circuit also including first and second closely spaced elongated conductors with said stationary contact mounted on said first conductor;

said conductors being operatively positioned to have current flow in opposite directions therethrough to create an electrodynamic force acting on said first conductor in a first direction urging said stationary contact toward said movable contact;

stop means to limit movement of said first conductor in said first direction to establish a normal open circuit position for said stationary contact.

3. Load management apparatus as set forth in claim 1 in which the main contact means includes a relatively movable contact and a relatively stationary contact;

a mechanical biasing means urging said movable contact in a first direction toward said movable contact;

stop means to limit movement of said movable contact in said first direction to establish a normal open circuit position for said stationary contact;

said second mechanism in closing said main contact means moving said stationary contact slightly from said normal open circuit position in a second direction opposite to said first direction against the force generated by the biasing means.

4. Load management apparatus as set forth in claim 1 in which the second mechanism includes a main spring means, linkage means connecting said movable contact to said main spring means and being operable by the latter to move between first and second positions wherein the main contact means are respectively open and closed;

said operator means being operatively connected to said main spring means to selectively move the line of action thereof to opposite sides of a center line;

said main spring means operating said linkage means to said first position when said line of action is on one side of said center line and operating said linkage means to said second position when said line of action is on the other side of said center line.

5. Load management apparatus as set forth in claim 4 in which the operator means includes a first solenoid operatively connected to said main spring means to move the line of action thereof to said one side of said center line and a second solenoid operatively connected to said main spring means to move the line of action thereof to said other side of said center line.

6. Load management apparatus as set forth in claim 4 in which the linkage means includes a toggle which is collapsed when said linkage is in said first position and is extended when said linkage is in said second position.

7. Load management apparatus as set forth in claim 6 in which the management section also includes a movable contact arm, said main contact means including a relatively fixed contact and a cooperating relatively movable contact with the latter being mounted at one end of said arm;

a fixed first pivot at the other end of said arm;

said toggle including first and second links pivotally connected at a movable knee, said first link at the end thereof opposite said knee being pivotally connected to said arm, said second link at a point thereof displaced from said knee pivotally mounted on a fixed second pivot;

said main spring means being connected between said second link and a anchoring point;

said line of action extending between said anchoring point and said second point.

8. Load management apparatus as set forth in claim 7 in which the operator means includes first and second solenoids connected to said second link at points on opposite sides of said second pivot whereby actuation of said first and second solenoids respectively rocks said second link in opposite directions about said second pivot as a center.

9. Load management apparatus as set forth in claim 1 in which the switching and management sections constitute first and second modules, respectively;

said first module including a relatively narrow first housing wherein said interrupter contact means, said first mechanism and fault responsive trip means are mounted;

said second module including a relatively narrow second housing wherein said main contact means, said second mechanism and said operator means are mounted;

said housing being substantially of equal width and having generally similar profile dimensions.

10. Load management apparatus as set forth in claim 9 also including a load terminal for connecting an external load to said apparatus and a line terminal at which energy for a load connected to the load terminal is supplied to said apparatus;

said housings being mounted adjacent side-by-side relationship;

said terminals being at opposite ends of said apparatus;

said line terminal being positioned to engage an energizing terminal disposed so as to be generally centered in relation to the width of the apparatus.

11. Load management apparatus as set forth in claim 10 in which the load terminal is mounted to said second housing;

jumper means extending between said housings and series connecting said main contact means to said interrupter contact means;

said jumper means extending externally of said housings at the end of the apparatus having the load terminal disposed thereat.

12. Load management apparatus as set forth in claim 9 in which each of said modules is approximately one half inch wide.

13. Load management apparatus as set forth in claim 9 also including a plug-in type line terminal at one end of said apparatus in the region said modules are adjacent to each other, and a line terminal at the other end of said apparatus for connecting a load to said apparatus.

14. Load management apparatus as set forth in claim 1 also including circuit means through which control signals are applied to said operator means for selective energization thereof, said circuit means including normally closed auxiliary switch means opened by said operator means as the latter moves through a working stroke to interrupt application of control signals being applied to said operator means after completion of a control function.