Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1995-11-28
1998-04-28
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 46, 361 93, 361 91, H02H 316
Patent
active
057453225
ABSTRACT:
An electrical protection system which uses a ground fault interrupter (GFI) to protect a circuit from (A) ground faults and (B) overcurrents and/or overvoltages. For overcurrent protection, a control element may be coupled in series with the line or return input to the GFI, and a bypass element may be coupled in parallel with the control element and the GFI. In case of an overcurrent, the control element causes current to be diverted through the bypass element, thereby creating a current imbalance in the GFI circuitry causing the GFI to open the circuit. For overvoltage protection, a bypass element (e.g. a varistor) may be coupled between, e.g., the line sense input of the GFI and the return sense input of the GFI. In case of an overvoltage, the bypass element conducts current, thereby creating a current imbalance in the GFI circuitry causing the GFI to open the circuit.
REFERENCES:
patent: 3970975 (1976-07-01), Gryctko
patent: 4044395 (1977-08-01), Eckart
patent: 4068276 (1978-01-01), Pintell
patent: 4084203 (1978-04-01), Dietz et al.
patent: 4115829 (1978-09-01), Howell
patent: 4233640 (1980-11-01), Klein et al.
patent: 4344100 (1982-08-01), Davidson et al.
patent: 4348708 (1982-09-01), Howell
patent: 4521824 (1985-06-01), Morris et al.
patent: 4598331 (1986-07-01), Legatti
patent: 4618907 (1986-10-01), Leopold
patent: 4816958 (1989-03-01), Belbel et al.
patent: 4931894 (1990-06-01), Legatti
patent: 4949214 (1990-08-01), Spencer
patent: 4994933 (1991-02-01), Matsuoka
patent: 5177657 (1993-01-01), Baer et al.
patent: 5179490 (1993-01-01), Lawrence
patent: 5198955 (1993-03-01), Willner
patent: 5202662 (1993-04-01), Bienwald et al.
patent: 5361183 (1994-11-01), Wiese
Technology for Detecting and Monitoring Conditions that Could Cause Electrical Wiring System Fires, Underwriters Laboratories Inc., Sep. 1995.
Chiang Justin
Duffy Hugh
Midgley John
Thomas Brian
Burkard Herbert G.
Gaffin Jeffrey A.
Raychem Corporation
Sherry Michael J.
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