US3590190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas blast circuit interrupter with movable flow director engagable with a stationary resistance inserting means during opening and closing
Assignee: Westinghouse Electric Corp
•
Filing: 1968-11-05
•
Granted: 1971-06-29
•
Expires: 1988-11-05
Abstract
Abstract In order to reduce the rate of rise of the recovery voltage of a kilometric or short-line fault, resistors are connected in the circuit to be interrupted during an opening operation. A resistor is provided on each one of two terminal bushings extending through the ends of the housing for each interrupting unit of a circuit breaker. The resistors also function to divide the voltage equally across the two series breaks in the interrupter and they function as damping resistors to prevent restrikes during opening and excessive over voltages during closing. During opening, the resistors are inserted in the circuit and then are disconnected. During closing, the resistors are inserted in the circuit and then shorted out of the circuit. The resistor contacts are mounted on a stationary flow director and are engaged by the outer surface of a conductive movable flow director which is concentric with the movable hollow contact.
Inventors
- 👤 Robert G Colclaser Jr
- 👤 Charles F Cromer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:55
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/16; H01H33/70; H01H33/7015; H01H33/7069
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
222 words
In a compressed-gas circuit interrupter, in combination, a metal housing containing interrupting gas at a relatively low pressure, a reservoir chamber containing interrupting gas at a relatively high pressure, terminal bushings extending through opposite ends of the housing, a generally tubular conducting arcing member mounted on the inner end of each bushing, contact fingers surrounding said tubular conducting arcing member, an insulating flow-directing member having one enD mounted on the bushing around the contact fingers, a conducting ring mounted on the other end of the insulating member, resistance means connected between the ring and the inner end of the bushing, a bridging crossarm rotatably mounted in the housing, contact means carried by the crossarm including two hollow concentric conducting members one engaging the contact fingers and the other bearing against said conducting ring in the closed position, said arm being rotatable in one direction first to disengage the said one member from the contact fingers to insert the resistance means in the circuit and then to disengage the said other member from the ring to disconnect the resistance means, and said arm being rotatable in the opposite direction first to engage the contact means with the ring to insert the resistance means in the circuit and then to engage the contact means with the contact fingers to short out the resistance means.
Claim 2
Dependent Claim
222 words
In a compressed-gas circuit interrupter, in combination, a metal housing containing interrupting gas at a relatively low pressure, a reservoir chamber containing interrupting gas at a relatively high pressure, terminal bushings extending through opposite ends of the housing, a generally tubular conducting arcing member mounted on the inner end of each bushing, contact fingers surrounding said tubular conducting arcing member, an insulating flow-directing member having one enD mounted on the bushing around the contact fingers, a conducting ring mounted on the other end of the insulating member, resistance means connected between the ring and the inner end of the bushing, a bridging crossarm rotatably mounted in the housing, contact means carried by the crossarm including two hollow concentric conducting members one engaging the contact fingers and the other bearing against said conducting ring in the closed position, said arm being rotatable in one direction first to disengage the said one member from the contact fingers to insert the resistance means in the circuit and then to disengage the said other member from the ring to disconnect the resistance means, and said arm being rotatable in the opposite direction first to engage the contact means with the ring to insert the resistance means in the circuit and then to engage the contact means with the contact fingers to short out the resistance means.
Claim 3
Dependent Claim
15 words
The combination defined in claim 1, wherein the resistance means is supported by the bushing.
Claim 4
Dependent Claim
50 words
The combination defined in claim 1, including a bearing support attached to the reservoir chamber, and wherein the bridging crossarm is hollow and is rotatably mounted on the bearing support, and including valve means disposed in the bearing support for controlling the flow of interrupting gas through the hollow crossarm.
Claim 5
Dependent Claim
20 words
The combination defined in claim 3, wherein the interrupting gas flows through the hollow crossarm and the hollow contact means.
Claim 6
Dependent Claim
31 words
The combination defined in claim 1, wherein the insulating flow directing member causes the gas to flow through the contact member on the arm and the tubular member on the bushing.
Claim 7
Dependent Claim
241 words
A compressed-gas circuit interrupter comprising a housing containing interrupting gas at a relatively low pressure, a reservoir chamber containing interrupting gas at a relatively high pressure, terminal bushings extending through opposite ends of the housing, each bushing having a conductor extending therethrough with a bushing foot connected to the inner end of the conductor, the bushing foot having an opening therethrough, a generally tubular stationary conducting arcing member disposed in the opening and attached to the foot, spring-biased contact fingers pivotally mounted on said member, a hollow insulating member having one end mounted on the foot around the contact fingers, a contact ring mounted on the other end of the insulating member, resistance means connected between the ring and the bushing foot, a hollow crossarm rotatably mounted inside the housing, each end of the arm having an angularly extending flow director thereon constituting a resistance contact, a generally tubular contact member disposed inside of and spaced from the flow director and constituting a main movable contact, said arm being rotatable in one direction first to engage the resistance contact with the ring and then to engage the main movable contact member with the contact fingers, said arm being rotatable in the opposite direction first to disengage the main movable contact member from the contact fingers and then to disengage the resistance contact from the ring, and valve means for controlling the flow of gas from the reservoir chamber through the crossarm.
Claim 8
Dependent Claim
241 words
A compressed-gas circuit interrupter comprising a housing containing interrupting gas at a relatively low pressure, a reservoir chamber containing interrupting gas at a relatively high pressure, terminal bushings extending through opposite ends of the housing, each bushing having a conductor extending therethrough with a bushing foot connected to the inner end of the conductor, the bushing foot having an opening therethrough, a generally tubular stationary conducting arcing member disposed in the opening and attached to the foot, spring-biased contact fingers pivotally mounted on said member, a hollow insulating member having one end mounted on the foot around the contact fingers, a contact ring mounted on the other end of the insulating member, resistance means connected between the ring and the bushing foot, a hollow crossarm rotatably mounted inside the housing, each end of the arm having an angularly extending flow director thereon constituting a resistance contact, a generally tubular contact member disposed inside of and spaced from the flow director and constituting a main movable contact, said arm being rotatable in one direction first to engage the resistance contact with the ring and then to engage the main movable contact member with the contact fingers, said arm being rotatable in the opposite direction first to disengage the main movable contact member from the contact fingers and then to disengage the resistance contact from the ring, and valve means for controlling the flow of gas from the reservoir chamber through the crossarm.
Claim 9
Dependent Claim
29 words
The circuit interrupter defined in claim 6, including a hollow bearing support attached to the reservoir chamber, and wherein the hollow crossarm is rotatably mounted on the bearing support.
Claim 10
Dependent Claim
35 words
The circuit interrupter defined in claim 7, wherein the flow director cooperates with the insulating member to direct the flow of gas through the tubular main moving contact member and through the tubular stationary member.
Claim 11
Dependent Claim
83 words
The circuit interrupter defined in claim 6, including a spring-biased contact movably disposed in the ring, and wherein the arm is rotatable in one direction first to engage the resistance contact with the spring-biased contact in the ring and then to engage the contact main movable member with the contact fingers, said arm being rotatable in The opposite direction first to disengage the contact member from the contact fingers and then to disengage the flow director from the spring-biased contact in the ring.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |