Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1992-06-05
1995-12-05
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307117, 361173, 361 2, H01H 3500
Patent
active
054732026
ABSTRACT:
A control unit for switching AC powered high efficiency lighting in response to a signal from an occupancy sensor. The lighting is switched by a hybrid mechanical relay/semiconductor switch. The semiconductor switch is connected in parallel with the relay switch contacts to protect them and is controlled by a noise-insensitive zero voltage crossing detector circuit which switches the semiconductor switch only at the zero crossings of the AC power. The semiconductor switch is preferably turned on by a pulse forming circuit only for a brief period of time spanning the time when the relay is switching.
REFERENCES:
patent: 3671849 (1972-06-01), Kingston
patent: 4356525 (1982-10-01), Kornrumpf et al.
patent: 4389691 (1983-06-01), Hancock
patent: 4525762 (1985-06-01), Norris
patent: 4598330 (1986-07-01), Woodworth
patent: 4618906 (1986-10-01), Paice et al.
patent: 4701676 (1987-10-01), Gibson
patent: 4704652 (1987-11-01), Billings
patent: 4716511 (1987-12-01), Masaki
patent: 4745511 (1988-05-01), Kugelman et al.
patent: 4760483 (1988-07-01), Kugelman et al.
patent: 5053907 (1991-10-01), Nishi et al.
Mudge Philip H.
Platner Brian
Ganjoo Peter
Platner Brian
Shoop Jr. William M.
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