Method and apparatus for sensing voltage in an automatic...

Details Method and apparatus for sensing voltage in an automatic... Method and apparatus for sensing voltage in an automatic...

2007-01-02

2007-01-02

Sircus, Brian (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Selective or optional sources

C307S129000

Reexamination Certificate

active

10375972

ABSTRACT:
An Automatic Transfer Switch System includes a control circuit in which high frequency transformers, designed to operate linearly in a frequency range above the operating frequency range of utility-level power, are employed for voltage sensing. An output signal from a high frequency line matching transformer is received by a microprocessor which evaluates the signal for both a voltage level and frequency and uses these values as indices to an empirically-derived look-up table which provides an actual voltage level to the microprocessor. The actual voltage value can then be evaluated by the microprocessor to determine if and when the power delivered to a load should be supplied by a first or a second power supply.

REFERENCES:
patent: 4419619 (1983-12-01), Jindrick et al.
patent: 4623265 (1986-11-01), Poyser
patent: 4747061 (1988-05-01), Lagree et al.
patent: 4931725 (1990-06-01), Hutt et al.
patent: 5198698 (1993-03-01), Paul et al.
patent: 5345409 (1994-09-01), McGrath et al.
patent: 5369355 (1994-11-01), Roe
patent: 5373433 (1994-12-01), Thomas
patent: 5581133 (1996-12-01), Smith et al.
patent: 5621254 (1997-04-01), Takeda et al.
patent: 5790391 (1998-08-01), Stich et al.
patent: 5923141 (1999-07-01), McHugh
patent: 2002/0175897 (2002-11-01), Pelosi
patent: 406013252 (1994-01-01), None
patent: 06217555 (1994-08-01), None
Machine translation of ONO, Akihisa (JP 06217555 A), Aug. 5, 1994.

Affiliated with

Also associated with

Rating

Method and apparatus for sensing voltage in an automatic... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for sensing voltage in an automatic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for sensing voltage in an automatic... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3810449