Device and method for eliminating transformer excitation losses

Details Device and method for eliminating transformer excitation losses Device and method for eliminating transformer excitation losses

2010-01-12

2011-11-15

Nguyen, Tuyen (Department: 2832)

Inductor devices

Polyphase

Reexamination Certificate

active

08058958

ABSTRACT:
The invention is a device and method for eliminating core excitation losses in a distribution transformer when the transformer is not supplying power to loads. The invention consists of sensors, a control circuit, a user interface and a power contactor. The power contactor is connected on the line side of a transformer and is opened or closed automatically based on preprogrammed time or load criteria determined by the control circuit. In one operational mode and when the transformer is disconnected from the line, the control board generates low power pulses at the transformer load connection points in order to “search” for loads. If a load is detected, the transformer is reconnected by way of contactor closure. If the transformer load drops to zero, for a predetermined amount of time, the transformer is again disconnected and the pulsed load search is reestablished.

REFERENCES:
patent: 3614461 (1971-10-01), Speer et al.
patent: 3967180 (1976-06-01), Weber et al.
patent: 4190800 (1980-02-01), Kelly, Jr. et al.
patent: 4281515 (1981-08-01), Ferriera
patent: 4565929 (1986-01-01), Baskin et al.
patent: 4626763 (1986-12-01), Edwards
patent: 4685022 (1987-08-01), Nichols et al.
patent: 5519306 (1996-05-01), Itoh et al.
patent: 5539601 (1996-07-01), Farag
patent: 6175510 (2001-01-01), Loh
patent: 6434024 (2002-08-01), Shirato
patent: 7511979 (2009-03-01), Newman, Jr.
patent: 7688558 (2010-03-01), Bax et al.

Affiliated with

Also associated with

Rating

Device and method for eliminating transformer excitation losses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device and method for eliminating transformer excitation losses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and method for eliminating transformer excitation losses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4286928