Surge protector for vehicular traffic monitoring equipment

Details Surge protector for vehicular traffic monitoring equipment Surge protector for vehicular traffic monitoring equipment

1992-11-02

1994-10-04

Hoff, Marc S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361 56, 361111, 361127, H02H 904

Patent

active

053531892

ABSTRACT:
A surge protection device for low level electronic systems and especially conventional roadway traffic monitoring equipment connected to embedded roadway sensors, which includes, for each sensor, first and second stage common mode and normal mode surge arrestor circuits and which stages are connected by a common mode choke in series with the sensor circuit and monitoring equipment. The first and second stage surge arrestor circuits and choke are preferably mounted on surge arrestor circuit boards having enlarged conductive traces and peripheral ground contact surfaces which enable large surge currents to pass to ground when the boards are mounted to a common grounding backplane.

REFERENCES:
patent: 3943339 (1976-03-01), Koerner
patent: 4430636 (1984-02-01), Bruce
patent: 4568937 (1986-02-01), Clark
patent: 4680717 (1987-07-01), Martin
patent: 5142430 (1992-08-01), Anthony

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