Patent US3878436A successfully refreshed from Google Patents.
US3878436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit recloser with static control
Assignee: ABB Inc USA
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Filing: 1973-11-20
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Granted: 1975-04-15
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Expires: 1993-11-20
Abstract
Abstract A circuit interrupter having a control system comprising solid state circuit components including integrated circuits. The control system is programmable to provide multiple predetermined functions such as: time delay before circuit interrupter opening during a duty cycle, time delay before circuit interrupter closing during a duty cycle, time delay before a control system reset after fault clearing and control of the number of trips to lockout for the circuit recloser. No mechanical relays are used in the control system circuit except the auxiliary contacts of the circuit interrupter. A binary counter and decoder are used for counting the number of subsequent closings and openings of the circuit interrupter during a duty cycle and for advancing the various functions of the control system in accordance with programmed settings. The trip coil for the circuit interrupter may be energized for opening the circuit breaker up to one-half hour after power has been removed from the control system. A power supply is provided which may be energized from the electrical lines being protected or from a separate independent source of power. In the former case, the power supply is adapted to continuously energize the control system even though a short circuit fault may appear across the electrical lines which provide energy to the power supply. The power supply is also adapted to be used in combination with potential transformers and the current sensors of the system for regulating or clamping the input signal which is provided to the control system if the fault which is monitored by the sensor reaches a predetermined value.
Inventors
- 👤 George F Bogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:46
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/07; H02H1/00; H02H1/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
An electric circuit recloser, comprising separable main contacts for interconnecting an electrical circuit connected thereto; means for opening and closing said separable main contacts in response to a stimulus; a control for providing said stimulus; a power supply for empowering said control, said power supply having a regulating means therein to regulate the output voltage of said power supply; a sensor for monitoring said electrical circuit to thereby pRovide information about the fault status of said electrical circuit to said control; and a transformer having a primary winding, a secondary winding, and auxiliary winding, and a potential developing resistor connected across said primary winding, said primary winding being connected to said sensor, said secondary winding being connected to said control, said auxiliary winding being connected to said power supply, said auxiliary winding interacting with said regulating means of said power supply to generally fix the maximum value of voltage which may appear across said secondary winding regardless of the fault status of said electrical circuit by electromagnetically controlling the amount of electrical current flowing in said primary winding to keep the amount of current flowing in said potential developing resistor constant regardless of the amount of said fault current after a predetermined maximum secondary voltage appears on said secondary winding.
Claim 2
Dependent Claim
210 words
An electric circuit recloser, comprising separable main contacts for interconnecting an electrical circuit connected thereto; means for opening and closing said separable main contacts in response to a stimulus; a control for providing said stimulus; a power supply for empowering said control, said power supply having a regulating means therein to regulate the output voltage of said power supply; a sensor for monitoring said electrical circuit to thereby pRovide information about the fault status of said electrical circuit to said control; and a transformer having a primary winding, a secondary winding, and auxiliary winding, and a potential developing resistor connected across said primary winding, said primary winding being connected to said sensor, said secondary winding being connected to said control, said auxiliary winding being connected to said power supply, said auxiliary winding interacting with said regulating means of said power supply to generally fix the maximum value of voltage which may appear across said secondary winding regardless of the fault status of said electrical circuit by electromagnetically controlling the amount of electrical current flowing in said primary winding to keep the amount of current flowing in said potential developing resistor constant regardless of the amount of said fault current after a predetermined maximum secondary voltage appears on said secondary winding.
Claim 3
Dependent Claim
157 words
An electric circuit recloser, comprising: separable main contacts for interconnecting an electrical circuit connected thereto; means for opening and closing said separable main contacts in response to a stimulus; a control for providing said stimulus; a power supply for empowering said control, said power supply having regulating means therein to regulate the output voltage of said power supply; a sensor for monitoring said electrical circuit to provide information about the fault status of said electrical circuit to said control; and a transformer having a primary winding, a secondary winding, and an auxiliary winding, and a potential developing resistor connected across said primary winding, said primary winding being connected to said sensor, said secondary winding being connected to said control, said auxiliary winding interacting with said power supply to provide a voltage source therefore if the main source of power for said power supply fails to provide sufficient voltage to said power supply to energize said power supply.
Claim 4
Dependent Claim
157 words
An electric circuit recloser, comprising: separable main contacts for interconnecting an electrical circuit connected thereto; means for opening and closing said separable main contacts in response to a stimulus; a control for providing said stimulus; a power supply for empowering said control, said power supply having regulating means therein to regulate the output voltage of said power supply; a sensor for monitoring said electrical circuit to provide information about the fault status of said electrical circuit to said control; and a transformer having a primary winding, a secondary winding, and an auxiliary winding, and a potential developing resistor connected across said primary winding, said primary winding being connected to said sensor, said secondary winding being connected to said control, said auxiliary winding interacting with said power supply to provide a voltage source therefore if the main source of power for said power supply fails to provide sufficient voltage to said power supply to energize said power supply.
Claim 5
Dependent Claim
240 words
An electric circuit recloser, comprising separable main contacts for interconnecting an electrical circuit connected thereto; means for opening and closing said separable main contacts in response to a stimulus; a control for providing said stimulus; a power supply for empowering said control, said power supply having a regulating means therein to regulate the output voltage of said power supply; a sensor for monitoring said electrical circuit to thereby provide information about the fault status of said electrical circuit to said control; and a transformer having a primary winding, a secondary winding, and auxiliary winding, and a potential developing resistor connected across said primary winding, said primary winding being connected to said sensor, said secondary winding being connected to said control, said auxiliary winding interacting with said power supply to provide a voltage source therefore if the main source of power for said power supply fails to provide sufficient voltage to said power supply to energize said power supply, said auxiliary winding also interacting with said regulating means of said power supply to generally fix the maximum value of voltage which may appear across said secondary winding regardless of the fault status of said electrical circuit by electromagnetically controlling the amount of electrical current flowing in said primary winding to keep the amount of current flowing in said potential developing resistor constant regardless of the amount of said fault current after a predetermined maximum secondary voltage appears on said secondary winding.
Claim 6
Dependent Claim
240 words
An electric circuit recloser, comprising separable main contacts for interconnecting an electrical circuit connected thereto; means for opening and closing said separable main contacts in response to a stimulus; a control for providing said stimulus; a power supply for empowering said control, said power supply having a regulating means therein to regulate the output voltage of said power supply; a sensor for monitoring said electrical circuit to thereby provide information about the fault status of said electrical circuit to said control; and a transformer having a primary winding, a secondary winding, and auxiliary winding, and a potential developing resistor connected across said primary winding, said primary winding being connected to said sensor, said secondary winding being connected to said control, said auxiliary winding interacting with said power supply to provide a voltage source therefore if the main source of power for said power supply fails to provide sufficient voltage to said power supply to energize said power supply, said auxiliary winding also interacting with said regulating means of said power supply to generally fix the maximum value of voltage which may appear across said secondary winding regardless of the fault status of said electrical circuit by electromagnetically controlling the amount of electrical current flowing in said primary winding to keep the amount of current flowing in said potential developing resistor constant regardless of the amount of said fault current after a predetermined maximum secondary voltage appears on said secondary winding.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |