US4823022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for sensing power line conditions
Assignee: Lindsey Manufacturing Co
•
Filing: 1988-06-22
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Granted: 1989-04-18
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Expires: 2008-06-22
Abstract
Abstract A line condition sensing device, e.g. a current transformer and/or a voltage transformer, is embedded in a pole mounted, power line supporting insulator to form an integral unit therewith. One end of the insulator carries a pole mounting base. The other end of the insulator carries a power line receiving clamp. The line condition sensing device is connected in parallel with a hot power line by taps to permit conditions to be monitored without cutting or dead ending the line. The device is installed on a hot line by opening the power line receiving clamp of the original insulator, holding the power line in spaced relationship from the original insulator while replacing it with the new insulator, resecuring the power line on the clamp of the new insulator, and then connecting the taps to the hot power line.
Inventors
- 👤 Keith E. Lindsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:03
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/14; G01R15/142; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4417; G02B6/442; G02B6/4422; G02B6/46; G02B6/48; G02B6/483; H; H01; H01B; H01B17/00; H01B17/005; H02; H02G; H02G7/00; H02G7/05
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
64 words
Electrical power line sensing apparatus comprising: an electrical insulator having first and second ends; means for sensing power line conditions embedded in the insulator; first and second cables coupled to the sensing means and extending therefrom outside the insulator; a power line clamp attached to the first end of the insulator; and a pole mounting base attached to the second end of the insulator.
Claim 2
Dependent Claim
64 words
Electrical power line sensing apparatus comprising: an electrical insulator having first and second ends; means for sensing power line conditions embedded in the insulator; first and second cables coupled to the sensing means and extending therefrom outside the insulator; a power line clamp attached to the first end of the insulator; and a pole mounting base attached to the second end of the insulator.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1, in which the base is adapted for horizontal mounting of the insulator.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1, in which the base is adapted for vertical mounting of the insulator.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1, in which the power line clamp is a trunnion type clamp.
Claim 6
Dependent Claim
14 words
The apparatus of claim 1, in which the sensing means comprises a current transformer.
Claim 7
Dependent Claim
14 words
The apparatus of claim 1, in which the sensing means comprising a voltage transformer.
Claim 8
Dependent Claim
15 words
The apparatus of claim 6, in which the sensing means additionally comprises a current transformer.
Claim 9
Dependent Claim
19 words
The apparatus of claim 5, in which the current transformer is embedded near the first end of the insulator.
Claim 10
Dependent Claim
19 words
The apparatus of claim 8, in which the voltage transformer is embedded near the second end of the insulator.
Claim 11
Dependent Claim
19 words
The apparatus of claim 6, in which the voltage transformer is embedded near the second end of the insulator.
Claim 12
Dependent Claim
110 words
In a power transmission system having power poles and at least one power line, the combination comprising: an electrical insulator mounted on the pole to support the line in space relationship from the pole; means mounted on the pole for sensing power line conditions; a first cable connected at one end to the sensing means; a second cable connected at one end to the sensing means; means for connecting the other end of the first cable to the power line; and means for connecting the other end of the second cable to the power line to place the sensing means in parallel circuit with the power line between the connections.
Claim 13
Dependent Claim
110 words
In a power transmission system having power poles and at least one power line, the combination comprising: an electrical insulator mounted on the pole to support the line in space relationship from the pole; means mounted on the pole for sensing power line conditions; a first cable connected at one end to the sensing means; a second cable connected at one end to the sensing means; means for connecting the other end of the first cable to the power line; and means for connecting the other end of the second cable to the power line to place the sensing means in parallel circuit with the power line between the connections.
Claim 14
Dependent Claim
17 words
The combination of claim 11, in which the first and second connecting means comprise hot line taps.
Claim 15
Dependent Claim
14 words
The combination of claim 12, in which the sensing means comprises a current transformer.
Claim 16
Dependent Claim
15 words
The combination of claim 13, in which the sensing means additionally comprises a voltage transformer.
Claim 17
Dependent Claim
17 words
The combination of claim 14, in which the current and voltage transformers are embedded in the insulator.
Claim 18
Dependent Claim
18 words
The combination of claim 13, in which the current transformer is embedded in the insulator near the line.
Claim 19
Dependent Claim
18 words
The combination of claim 14, in which the voltage transformer is embedded in the insulator near the pole.
Claim 20
Dependent Claim
15 words
The combination of claim 15, in which the insulator is horizontally mounted on the pole.
Claim 21
Dependent Claim
21 words
The combination of claim 15, in which the pole has a crossarm and the insulator is vertically mounted on the crossarm.
Claim 22
Dependent Claim
20 words
The combination of claim 13, in which the current transformer has a primary winding connected in series with the cables.
Claim 23
Dependent Claim
22 words
The combination of claim 14, in which the voltage transformer has a primary winding connected between one of the cables and ground.
Claim 24
Independent Claim
90 words
A method for monitoring the conditions of a power line supported by an insulator that is mounted on a power pole, the method comprising the steps of: detaching the power line from the insulator; lifting the power line away from the insulator; dismounting the insulator from the power pole; mounting on the power line a new insulator incorporating means for sensing power line conditions; lowering the power line onto the new insulator; attaching the power line to the new insulator; and electrically connecting the sensing means to the power line.
Claim 25
Independent Claim
90 words
A method for monitoring the conditions of a power line supported by an insulator that is mounted on a power pole, the method comprising the steps of: detaching the power line from the insulator; lifting the power line away from the insulator; dismounting the insulator from the power pole; mounting on the power line a new insulator incorporating means for sensing power line conditions; lowering the power line onto the new insulator; attaching the power line to the new insulator; and electrically connecting the sensing means to the power line.
Claim 26
Dependent Claim
55 words
The method of claim 22, in which the sensing means has a first cable and a second cable and the connecting step comprises connecting the first cable to the power line on one side of the new insulator and connecting the second cable to the power line on the other side of the new insulator.
Claim 27
Dependent Claim
24 words
The method of claim 23, in which the connecting step connects the first and second cables to the power line with hot line taps.
Claim 28
Dependent Claim
15 words
The method of claim 22, in which the line is hot during the connecting step.
Claim 29
Dependent Claim
15 words
The apparatus of claim 1, additionally comprising a choke attached to the power line clamp.
Claim 30
Dependent Claim
14 words
The apparatus of claim 26, in which the choke is a split annular choke.
Claim 31
Dependent Claim
30 words
The apparatus of claim 27, in which the choke comprises an inner core made of annular alternating laminations of insulative and ferromagnetic material and a housing surrounding the inner core.
Claim 32
Dependent Claim
15 words
The apparatus of claim 28, in which a hot eye is formed on the housing.
Claim 33
Dependent Claim
31 words
The apparatus of claim 1, in which the sensing means comprises first and second capacitors connected in series and a terminal connected to the junction of the first and second capacitors.
Claim 34
Dependent Claim
15 words
The apparatus of claim 30, in which the sensing means additionally comprises a current transformer.
Claim 35
Dependent Claim
19 words
The combination of claim 11, additionally comprising an inductance connected in series with the power line between the cables.
Claim 36
Dependent Claim
16 words
The combination of claim 11, in which the inductance comprises a choke surrounding the power line.
Claim 37
Dependent Claim
14 words
The combination of claim 33, in which the choke is a split annular choke.
Claim 38
Dependent Claim
30 words
The combination of claim 34, in which the choke comprises an inner core made of annular alternating laminations of insulative and ferromagnetic material and a housing surrounding the inner core.
Claim 39
Dependent Claim
15 words
The combination of claim 35, in which a hot eye is formed on the housing.
Claim 40
Dependent Claim
31 words
The combination of claim 11, in which the sensing means comprises first and second capacitors connected in series and a terminal connected to the junction of the first and second capacitors.
Claim 41
Dependent Claim
15 words
The combination of claim 37, in which the sensing means additionally comprises a current transformer.
Claim 42
Dependent Claim
21 words
The combination of claim 38, in which the first and second capacitors and the current transformer are embedded in the insulator.
Claim 43
Dependent Claim
45 words
The method of claim 23, additionally comprising the steps of separating a split choke into two parts, placing the two parts around the power line between the cables, and bolting the two parts together to surround the power line with the choke between the cables.
Claim 44
Dependent Claim
23 words
The method of claim 40, additionally comprising the step of attaching the choke to the new insulator after bolting the two parts together.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |