Patent US4241306A successfully refreshed from Google Patents.
US4241306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test fixture having switching means for facilitating transformer turns ratio testing
Assignee: AVO Multi Amp Corp
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Filing: 1978-08-29
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Granted: 1980-12-23
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Expires: 1998-08-29
Abstract
Abstract This disclosure relates to a transformer terminal switching unit or fixture with specially designed output terminals and transformer attachment cables. The disclosed transformer terminal switching unit is especially useful as an accessory to the BIDDLE Transformer Turn Ratio (TTR), tester, catalogue number 55003. The design of the transformer terminal switching test fixture is especially useful to test delta-star connected, three phase utility transformers with subtractively connected winding polarity. A transformer with additive windings can also be tested with the disclosed testing fixture.
Inventors
- 👤 Russell E. Bump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:46
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/20; G01R31/00; G01R31/50; G01R31/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
247 words
In a system comprising a transformer turns ratio test unit and a transformer having both primary and secondary windings to be ratio tested which system utilizes said transformer turns ratio test unit to perform turns ratio tests on said transformer to be tested, a test fixture comprising: input coupling means for connection to a transformer to be tested, output coupling means for connection to a turns ratio test unit, switching means connected between said input and output coupling means, said input means comprising seven test leads comprising three wire primary transformer connection leads, and four double wire secondary transformer connection leads, each of said four double wire secondary transformer connection leads having a current wire and a potential wire, said output coupling means comprising a pair of secondary output terminals for connection to the secondary test leads of said turns ratio test unit, said output coupling means further comprising a pair of primary output terminals for connection to the primary test leads of said turns ratio test unit. said switching means further comprising three primary switching element means and three secondary switching element means, said primary switching elment means effecting the selective electrical coupling of any two of three primary transformer connection leads to said primary output terminals. said secondary switching element means effecting the selective electrical coupling of a common one of four of said secondary transformer connection leads and one of the other three secondary transformer connection leads to said pair of secondary output terminals.
Claim 2
Dependent Claim
247 words
In a system comprising a transformer turns ratio test unit and a transformer having both primary and secondary windings to be ratio tested which system utilizes said transformer turns ratio test unit to perform turns ratio tests on said transformer to be tested, a test fixture comprising: input coupling means for connection to a transformer to be tested, output coupling means for connection to a turns ratio test unit, switching means connected between said input and output coupling means, said input means comprising seven test leads comprising three wire primary transformer connection leads, and four double wire secondary transformer connection leads, each of said four double wire secondary transformer connection leads having a current wire and a potential wire, said output coupling means comprising a pair of secondary output terminals for connection to the secondary test leads of said turns ratio test unit, said output coupling means further comprising a pair of primary output terminals for connection to the primary test leads of said turns ratio test unit. said switching means further comprising three primary switching element means and three secondary switching element means, said primary switching elment means effecting the selective electrical coupling of any two of three primary transformer connection leads to said primary output terminals. said secondary switching element means effecting the selective electrical coupling of a common one of four of said secondary transformer connection leads and one of the other three secondary transformer connection leads to said pair of secondary output terminals.
Claim 3
Dependent Claim
24 words
A test fixture in accordance to claim 1 wherein said secondary output terminals are elongated electrodes having a dielectric spacer located between said electrodes.
Claim 4
Dependent Claim
18 words
A test fixture in accordance to claim 1 wherein said input coupling test lead connection means are clips.
Claim 5
Dependent Claim
36 words
A test fixture in accordance to claim 1 wherein the three primary switching element means comprise three seperate double pole on-off switches, and the three secondary switching element means comprising three seperate four pole on-off switches.
References Cited (Backward Citations)
US3231817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |