Patent US4369364A successfully refreshed from Google Patents.
US4369364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring device with an optical sensor for the detection of interference arcs in electrical systems
Assignee: BBC BROWN BOVERI & Co Ltd
•
Filing: 1979-07-13
•
Granted: 1983-01-18
•
Expires: 1999-07-13
Abstract
Abstract A monitoring system with an optical sensor for the detection of interference arcs in electrical systems, particularly in enclosed SF 6 -insulated high voltage systems. The system improves the reliability of the sensor by means of a test light impulse supplied from outside the enclosure by examining the exit surface as well as the entry surface on the sensor for the light beam for turbidity by means of a light-diffusing coating on the surface. To that end, the sensor has at least a second photoconductor with an external light source for the production of test light impulses and the test light impulse is led through a portion of the space to be monitored before it enters again into the sensor and the first photoconductor.
Inventors
- 👤 Jurgen H. Kuntermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:44
CPC Classifications
H; H02; H02H; H02H1/00; H02H1/0007; H02H1/0015; H02H1/0023; H02B; H02B13/00; H02B13/02; H02B13/035; H02B13/065
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
159 words
A monitoring device for the detection of interference arcs in an electrical system, particularly in an enclosed SF 6 -gas-insulated high voltage system, comprising: a passive non-metallic optical sensor comprising, a transparent protective cylinder defining an axis and having first and second photoconductors arranged in parallel with each other and the cylinder axis, said photoconductors disposed gas-tightly in said system, said first conductor provided to lead out of said system light impulses produced by an interference arc, an external light source coupled to said second photoconductor for the production of test light impulses to be transmitted through said second photoconductor, and means for passing the test light impulses transmitted through said second photoconductor through a portion of the space within said system being monitored and to said first photoconductor, including a collective lens for focusing said test light impulses passed through said portion of said space at said first photoconductor as said test light impulses enter said first photoconductor.
Claim 2
Dependent Claim
159 words
A monitoring device for the detection of interference arcs in an electrical system, particularly in an enclosed SF 6 -gas-insulated high voltage system, comprising: a passive non-metallic optical sensor comprising, a transparent protective cylinder defining an axis and having first and second photoconductors arranged in parallel with each other and the cylinder axis, said photoconductors disposed gas-tightly in said system, said first conductor provided to lead out of said system light impulses produced by an interference arc, an external light source coupled to said second photoconductor for the production of test light impulses to be transmitted through said second photoconductor, and means for passing the test light impulses transmitted through said second photoconductor through a portion of the space within said system being monitored and to said first photoconductor, including a collective lens for focusing said test light impulses passed through said portion of said space at said first photoconductor as said test light impulses enter said first photoconductor.
Claim 3
Dependent Claim
21 words
A monitoring device according to claim 1, comprising: a reflector arranged in front of the collective lens at a predetermined distance.
Claim 4
Dependent Claim
30 words
A monitoring device according to claim 2, comprising: the protective cylinder having the collective lens integrally formed, wherein the integrally formed lens is positioned between said reflector and said photoconductors.
Claim 5
Dependent Claim
22 words
A monitoring device according to claim 1, comprising: the protective cylinder consisting of a material different from that of the collective lens.
Claim 6
Dependent Claim
24 words
A monitoring device according to claims 1 or 2, comprising: the collective lens having a flattened area in the range of the optical axis.
Claim 7
Dependent Claim
27 words
A monitoring device according to claim 5, comprising: the collective lens consisting of a material having a refractive index higher than that of SF 6 (sulfuric hexafluoride).
Claim 8
Dependent Claim
16 words
A monitoring device according to claim 6, wherein the collective lens consists of an acrylic resin.
Claim 9
Dependent Claim
44 words
A monitoring device according to claims 2 or 3, comprising: the reflector made of a perforated material in the form of a basket and mounted on the collective lens, and the reflector having a metal mirror or a reflective surface in the reflection area.
Claim 10
Dependent Claim
20 words
A monitoring device according to claim 8, comprising: the second photoconductor arranged axially recessed in comparison with the first photoconductor.
Claim 11
Dependent Claim
129 words
In a monitoring device for the detection of interference arcs in an electrical system, particularly in an enclosed SF 6 -gas-insulated high voltage system, an improved sensor comprising: a first photoconductor coupled gas-tightly to said system for leading out therefrom light impulses of an interference arc; a light source external to said system for the production of test impulses; a second photoconductor having one end coupled to said light source and another end gas-tightly protruding in said system, said second photoconductor having a bent portion within said system such that said another end faces said first photoconductor such that test impulses from said light source are transmitted via said first photoconductor through a portion of the space being monitored within said system and enters directly into said first photoconductor.
Claim 12
Dependent Claim
129 words
In a monitoring device for the detection of interference arcs in an electrical system, particularly in an enclosed SF 6 -gas-insulated high voltage system, an improved sensor comprising: a first photoconductor coupled gas-tightly to said system for leading out therefrom light impulses of an interference arc; a light source external to said system for the production of test impulses; a second photoconductor having one end coupled to said light source and another end gas-tightly protruding in said system, said second photoconductor having a bent portion within said system such that said another end faces said first photoconductor such that test impulses from said light source are transmitted via said first photoconductor through a portion of the space being monitored within said system and enters directly into said first photoconductor.
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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |