US4063148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
First house protector for voltage regulators and the like
Assignee: General Electric Co
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Filing: 1976-07-01
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Granted: 1977-12-13
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Expires: 1996-07-01
Abstract
Abstract A control circuit for limiting the output voltage of a voltage regulator or the like to a safe level for consumers connected close to the voltage regulator. The output voltage of the regulator is measured and compared to a reference. If the voltage exceeds the preset level then the circuit is energized to prevent further tap change that would increase the voltage output. A time delay is provided to prevent immediate de-energization of the circuit when the voltage drops below the preset level. Should line fluctuations cause further voltage increase, then the circuit will cause a tap change so as to reduce the output voltage. If the output voltage drops below a preset level then the circuit will prevent further tap changing which would cause any further lowering of the output voltage.
Inventors
- 👤 Hans R. Fehlmann
- 👤 Richard D. Blackburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:53
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/14; G05F1/147; G05F1/153
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A control circuit for limiting the output of voltage regulating equipment, such equipment including a drive means, said control circuit comprising: a. means for sensing the output of voltage regulating equipment; b. a first voltage divider fed by said sensing means;
Claim 2
Dependent Claim
41 words
A control circuit for limiting the output of voltage regulating equipment, such equipment including a drive means, said control circuit comprising: a. means for sensing the output of voltage regulating equipment; b. a first voltage divider fed by said sensing means;
Claim 3
Dependent Claim
227 words
said first voltage divider having means for setting a desired upper limit of the output, c. first operating means actuated by an overvoltage from said setting means of said first voltage divider; d. first relay means, said first relay means energized by said operating means to block further operation of the drive of the voltage regulating equipment in a direction to increase the voltage output of the voltage regulating equipment and; e. time delay means connected to said first operating means to prevent immediate de-energization of said first relay means when said divider voltage drops below said preset limit; f. a second operating means, said second operating means actuated by a further overvoltage from said first voltage divider, said second operating means energizing a second relay, 1. said second relay effective to cause the drive means of the voltage regulating equipment to drive the voltage regulating equipment to reduce the output voltage, g. a second voltage divider, said second voltage divider having means for setting a desired lower limit of the output; h. third operating means actuated by an undervoltage from said setting means of said second voltage divider; i. and a third relay means energized by said third operating means to block further operation of the drive means of the voltage regulating equipment in a direction to lower the voltage output of the voltage regulating equipment.
Claim 4
Dependent Claim
227 words
said first voltage divider having means for setting a desired upper limit of the output, c. first operating means actuated by an overvoltage from said setting means of said first voltage divider; d. first relay means, said first relay means energized by said operating means to block further operation of the drive of the voltage regulating equipment in a direction to increase the voltage output of the voltage regulating equipment and; e. time delay means connected to said first operating means to prevent immediate de-energization of said first relay means when said divider voltage drops below said preset limit; f. a second operating means, said second operating means actuated by a further overvoltage from said first voltage divider, said second operating means energizing a second relay, 1. said second relay effective to cause the drive means of the voltage regulating equipment to drive the voltage regulating equipment to reduce the output voltage, g. a second voltage divider, said second voltage divider having means for setting a desired lower limit of the output; h. third operating means actuated by an undervoltage from said setting means of said second voltage divider; i. and a third relay means energized by said third operating means to block further operation of the drive means of the voltage regulating equipment in a direction to lower the voltage output of the voltage regulating equipment.
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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |