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US 7,598,629 B2Granted
Control circuit for a remotely controlled circuit breaker
AssigneeSquare D Company
InventorsScott R. Brown, Rodney B. Washington, George E. Burke, Jr.
Life of this patent
Estimating the term…
Abstract
Circuit for determining the presence or absence of a remotely controlled circuit beaker connection to a control circuit and the current state of an internal operating device of a remotely controlled circuit breaker connected to a control circuit.
Claims23
A circuit for indicating the presence of a remotely controlled circuit breaker connected to a control circuit for controlling a plurality of remotely controlled circuit breakers, said circuit comprising:
- a power supply providing power to the control circuit and a movable contact operating device for remotely operating a movable contact of a connected remotely controlled circuit breaker between an OPEN and a CLOSED position;
- a control switch for electrically operating the movable contact operating device of a connected remotely controlled circuit breaker,
- a shut off switch for stopping the movable contact operating device of a connected remotely controlled circuit breaker after the movable contact has reached one of its OPEN or CLOSED positions;
- a plurality of sensing resistors being electrically connected in series with each other and having an electrical connection to a common terminal of the control switch between two of the plurality of sensing resistors, thereby placing at least one of the plurality of sensing resistors electrically in parallel with the movable contact operating device of a connected remotely controlled circuit breaker and;
- a sensing line electrically connected between two of the plurality of sensing resistors for providing an output signal indicating weather a remotely controlled circuit breaker is or is not connected to the circuit breaker control circuit.
2 more elements
A circuit for indicating the presence of a remotely controlled circuit breaker connected to a control circuit for controlling a plurality of remotely controlled circuit breakers, said circuit comprising:
- a power supply having positive and negative terminals for providing power to the control circuit and a movable contact operating device for remotely operating a movable contact of a connected remotely controlled circuit breaker between an OPEN and a CLOSED position;
- a control switch momentarily connecting a selected one of the positive or negative power supply terminals to a first terminal of the movable contact operating device of a connected remotely controlled circuit breaker,
- a shut off switch connecting one of the positive or negative power supply terminals to a second terminal of the movable contact operating device;
- a plurality of sensing resistor being electrically connected in series with each other and having an electrical connection to the first terminal of the movable contact operating device of a connected remotely controllable circuit breaker such that at least one of the plurality of sensing resistors is electrically in parallel with the movable contact operating device of a connected remotely controlled circuit breaker, and;
- a sensing line electrically connected between two of the plurality of sensing resistors for providing an output signal indicating weather a remotely controlled circuit breaker is or is not connected to the circuit breaker control circuit.
2 more elements
A circuit for indicating the presence of a remotely controlled circuit breaker connected to a control circuit for controlling a plurality of remotely controlled circuit breakers, said circuit comprising:
- a power supply providing power to the control circuit and a movable contact operating device for remotely operating a movable contact of a connected remotely controlled circuit breaker between an OPEN and a CLOSED position;
- a control switch for electrically operating the movable contact operating device, a shut off switch for stopping the movable contact operating device of a connected remotely controlled circuit breaker once the movable contact has reached one of its OPEN or CLOSED positions;
- a first sensing resistor having a first lead connected to a positive terminal of the power supply and a second lead connected to a common terminal of the control switch;
- a second sensing resistor having a first lead connected to the second lead of the first sensing resistor and the common terminal of the control switch, and a second lead;
- a third sensing resistor having a first lead connected to a negative terminal of the power supply and a second lead connected to the second lead of the second sensing resistor, and;
- a sensing line electrically connected between the second and third sensing resistors for providing a HIGH output signal when the movable contact operating device of a connected remotely controlled circuit breaker is in the movable contact CLOSED position, a LOW signal when the movable contact operating device of a connected remotely controlled circuit breaker is in the movable contact OPEN position or an INTERMEDIATE signal when no remotely controlled circuit breaker is connected to the control circuit.
3 more elements
Dependencies are inferred from the claim text.