US4881147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of sensitive electrical installations against the effects of lightning, and devices proposed for such arrangement
Assignee: Individual
•
Filing: 1987-03-02
•
Granted: 1989-11-14
•
Expires: 2007-03-02
Abstract
Abstract The protection arrangement according to the invention for protecting electric installations against lightning effects is characterized in that an electric relationship between a multiphase input line and the installation includes for each of the phases at least a first set of spark-gap arresters, at least a first self-inductance coil and at least a first variable resistance lightning arrester. Such an arrangement is particularly applicable to the protection of transformation units, hertzian relays or other delicate electric or electronic installations.
Inventors
- 👤 Jean-Paul Schaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:20
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/04; H02H9/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
142 words
Arrangement for the protection of an installation for transformation of electric current of similar installation connected to an overhead line, characterized: in that the electrical relation between the line and the installation comprises for each of the phases: at least a first set of arresters connected to the line, a first grounding conductor insulated for a minimum of 1,000 V for connecting the first set of arresters to ground, at least a first inductance coil connected to the first set of arresters and having a winding of approximately fifty loops 25 to 30 centimeters in diameter, the loops being insulated from one another to at least 1,000 V in permanent tension, at least one variable resistance arrester conected to the inductance coil, and a second grounding conductor insulated for a minimum of 1,000 V for connecting the variable resistnace arrester to ground.
Claim 2
Dependent Claim
142 words
Arrangement for the protection of an installation for transformation of electric current of similar installation connected to an overhead line, characterized: in that the electrical relation between the line and the installation comprises for each of the phases: at least a first set of arresters connected to the line, a first grounding conductor insulated for a minimum of 1,000 V for connecting the first set of arresters to ground, at least a first inductance coil connected to the first set of arresters and having a winding of approximately fifty loops 25 to 30 centimeters in diameter, the loops being insulated from one another to at least 1,000 V in permanent tension, at least one variable resistance arrester conected to the inductance coil, and a second grounding conductor insulated for a minimum of 1,000 V for connecting the variable resistnace arrester to ground.
Claim 3
Dependent Claim
18 words
Arrangement as in claim 1, the grounding conductors for the arresters being insulated and located near the ground.
Claim 4
Dependent Claim
19 words
Arrangement as in claim 1, characterized: in that, furthermore, the installation is mounted on rollers of high dielectric capacity.
Claim 5
Dependent Claim
27 words
Arrangement as in claim 1, characterized: in that said loops of the inductance coil are wound on a tube of insulating material containing no magnetic metal part.
Claim 6
Dependent Claim
91 words
Arrangement as in claim 1, said arrangement being intended for protection against lightning, at least one of said arresters comprising a pair of metal electrodes mounted in facing relationship and in proximity to one another, one electrode in said pair being connected to the line, the other electrode in said pair being connected to the ground, each of the electrodes in said pair comprising two branches forming an acute angle between them, one of said branches for each electrode defining an oblong opening near the longitudinal mid-point of the one branch.
Claim 7
Dependent Claim
20 words
Arrangement as in claim 5, said oblong opening being off-center with respect to the longitudinal axis of said one branch.
Claim 8
Dependent Claim
82 words
Arrangement as in claim 1, said coil being intended for the protection of the electrical installation against lightning, said coil being of the type comprising a sleeve and a winding of electroconducting wires disposed about said sleeve said sleeve being made of a material having dielectric properties at least equal to those of polyethylene, a pair of insulators for supporting said coil made of a material such as glass or ceramic, and nonmagnetic metal connecting elements affixed to the sleeve and insulators.
Claim 9
Dependent Claim
23 words
Arrangement as in claim 7, said elements connecting the sleeve to the insulators forming electrical terminals for connecting the coil to the line.
Claim 10
Dependent Claim
18 words
Arrangement as in claim 7, characterized: in that said insulators of said pair being identical with one another.
Claim 11
Dependent Claim
27 words
Arrangement as in claim 1, said coil being bathed in a highly dielectric medium, and a pan electrically insulated from the ground for containing the dielectric medium.
Claim 12
Dependent Claim
10 words
Arrangement as in claim 10, said medium comprising transformer oil.
Claim 13
Dependent Claim
20 words
Arrangement as in claim 10, said pan being is made of a non magnetic metal which is a good conductor.
Claim 14
Dependent Claim
52 words
Arrangement as in claim 1, which further comprises a connecting device for said line, said connecting device including a pair of shells and fastening means for securing the shells together, each of the shells being an elongated solid metal piece having an axial recess and longitudinal reliefs which fit into one another.
References Cited (Backward Citations)
US1477307A
Cited
US1755324A
Cited
US2993146A
Cited
US3631323A
Cited
US3673459A
Cited
DE2143543A1
Cited
DE2920979A1
Cited
US4328523A
Cited
EP0092052A1
Cited
US4665460A
Cited
FR2554284A1
Cited
US4563720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |