US3855503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remotely monitored and controlled transformer
Assignee: ABB Inc USA
•
Filing: 1973-09-26
•
Granted: 1974-12-17
•
Expires: 1993-09-26
Abstract
Abstract A power transformer adapted for remote monitoring and controlling, and system of providing same. The transformer contains a temperature sensor, a pressure sensor, and a deenergizing switch. Electrical signals from the sensors are transferred to a remote load management center which compares the signals to predetermined standards and originates a switching signal when a standard is exceeded. The switching signal opens the switch to de-energize the transformer. The load management center may utilize standards which are fixed or which are variable with other conditions in the power system.
Inventors
- 👤 D Ristuccia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:24
CPC Classifications
H; H02; H02H; H02H1/00; H02H1/0061; H02H7/00; H02H7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
Electrical apparatus comprising: an enclosure; a core and coil assembly disposed within said enclosure; temperature sensing means which electrically responds to the temperature of said core and coil assembly to provide a temperature signal which is detectable outside said enclosure; pressure sensing means which electrically responds to the pressure within said enclosure to provide a pressure signal which is detectable outside said enclosure; and switching means for disconnecting the coil from an energizing voltage, said switching means being responsive to an electrical switching signal which is originated from outside said enclosure.
Claim 2
Dependent Claim
91 words
Electrical apparatus comprising: an enclosure; a core and coil assembly disposed within said enclosure; temperature sensing means which electrically responds to the temperature of said core and coil assembly to provide a temperature signal which is detectable outside said enclosure; pressure sensing means which electrically responds to the pressure within said enclosure to provide a pressure signal which is detectable outside said enclosure; and switching means for disconnecting the coil from an energizing voltage, said switching means being responsive to an electrical switching signal which is originated from outside said enclosure.
Claim 3
Dependent Claim
86 words
The electrical apparatus of claim 1 including: transfer means for conveying signals, said transfer means having first and second ends; coupling means for connecting the first end of said transfer means to the temperature, pressure, and switching means; and a load management center which is connected to the second end of said transfer means, said load management center originating the switching signal which disconnects the coil from the energizing voltage, said switching signal being originated in response to predetermined conditions of the temperature and pressure signals.
Claim 4
Dependent Claim
49 words
The electrical apparatus of claim 2 wherein a switching signal is originated by the load management center when the temperature signal corresponds to a coil assembly temperature which exceeds a first predetermined temperature, said first predetermined temperature being greater than the coil assembly temperature during normal full load operation.
Claim 5
Dependent Claim
46 words
The electrical apparatus of claim 2 wherein a switching signal is originated by the load management center when the pressure signal corresponds to an enclosure pressure which exceeds a first predetermined pressure, said first predetermined pressure being greater than the enclosure pressure during moderately overloaded operation.
Claim 6
Dependent Claim
80 words
The electrical apparatus of claim 2 wherein a switching signal is originated by the load management center when the temperature signal corresponds to a coil assemblY temperature which exceeds a first predetermined temperature, and a switching signal is originated by the load management center when the pressure signal corresponds to an enclosure pressure which exceeds a first predetermined pressure, said first predetermined pressure being greater than the pressure produced, during constant load conditions, when the first predetermined temperature is produced.
Claim 7
Dependent Claim
25 words
The electrical apparatus of claim 1 wherein the temperature sensing means comprises a thermocouple located substantially within the structure of the core and coil assembly.
Claim 8
Dependent Claim
27 words
The electrical apparatus of claim 1 wherein the pressure sensing means comprises resistance means which changes electrical resistance in response to a change in the sensed pressure.
Claim 9
Dependent Claim
18 words
The electrical apparatus of claim 1 wherein the switching means comprises a vacuum switch located within the enclosure.
Claim 10
Dependent Claim
25 words
The electrical apparatus of claim 1 wherein a current operated protective device is connected in series circuit relationship with the coil and the energizing voltage.
Claim 11
Dependent Claim
55 words
The electrical apparatus of claim 2 wherein the load management center comprises: means for comparing the temperature signal with a first reference signal; means for comparing the pressure signal with a second reference signal; and means for originating a switching signal when either comparing means acquires a predetermined output signal in response to the comparisons.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |