Self-power tripping relay with balanced power supply current and

Details Self-power tripping relay with balanced power supply current and Self-power tripping relay with balanced power supply current and

1996-02-16

1997-01-28

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 18, 361 94, 363 89, H02H 300

Patent

active

055983154

ABSTRACT:
A current induction arrangement develops a power supply voltage and a measurement signal from current flowing in a circuit path so as to optimize both the energy developed in the power supply and the fidelity of the sinusoidal signal used to measure the waveform in the circuit path. The arrangement includes a capacitor accumulating current to develop a positive voltage with respect to common, a current transformer inducing current from the circuit path and providing an output having a positive induced-current signal component and a negative induced-current signal component. A rectifier circuit is arranged to receive the output from the current transformer, and to produce the positive induced current signal component at a positive output terminal and the negative induced current signal component at a negative output terminal. A first zener diode is connected to receive the positive induced-current signal component, and the circuit permits the positive induced-current signal to charge the capacitor. The first zener diode also has a second terminal coupled to common. A second first zener diode is coupled between the negative output terminal and common via a burden resistor. For developing a measurement voltage corresponding to the current produced by the current transformer, the burden resistor is arranged in series with the second zener diode. The positive and negative induced-current signal components are returned to the current transformers via common.

REFERENCES:
patent: 3582982 (1969-06-01), Swinhart et al.
patent: 3660718 (1972-05-01), Pinckaers
patent: 3683237 (1972-08-01), Walstad et al.
patent: 3808503 (1974-04-01), Hentschel
patent: 3875464 (1975-04-01), Gary et al.
patent: 3988641 (1976-10-01), Hentschel
patent: 3996480 (1976-12-01), Hentschel
patent: 4025883 (1977-05-01), Slade et al.
patent: 4041540 (1977-09-01), Kempf et al.
patent: 4048663 (1977-09-01), Lemke
patent: 4121269 (1978-10-01), Hobson, Jr.
patent: 4509088 (1985-04-01), Profio
patent: 4597025 (1986-06-01), Rutchik et al.
patent: 4731692 (1988-03-01), Dvorak et al.
patent: 4823226 (1989-04-01), Reed et al.
patent: 4833625 (1989-05-01), Fisher et al.
patent: 4879626 (1989-11-01), Kim
patent: 4897756 (1990-01-01), Zylstra
patent: 4992723 (1991-02-01), Zylstra et al.
patent: 5016135 (1991-05-01), Zylstra
patent: 5038246 (1991-08-01), Durivage
patent: 5179495 (1993-01-01), Zuzuly
patent: 5204594 (1993-04-01), Carobolante
Schematic for Micrologic Products.

Affiliated with

Also associated with

Rating

Self-power tripping relay with balanced power supply current and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-power tripping relay with balanced power supply current and, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-power tripping relay with balanced power supply current and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-945084