Packaged electrical transient surge protection

Details Packaged electrical transient surge protection Packaged electrical transient surge protection

1988-12-20

1990-03-06

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361104, 361111, 361117, 361127, H02H 904

Patent

active

049071190

ABSTRACT:
Electrical transient surge protection of electrical equipment downstream from a power source plus safeguarding of apparatus for providing such surge protection against failure at high currents or high temperature. Current-limiting and temperature-limiting fusible devices are used in conjunction with voltage-limiting devices, such as varistors, so as to protect watt-hour meters and downstream loads from electrical surges, and to safeguard such varistors from failure. Such apparatus may be located in such diverse places as a power line weatherhead, a watt-hour meter base, an adapter between a meter base and its normal mounting socket, or a circuit-breaker panel downstream of the meter and upstream of electrical loads metered thereby. The varistors are stacked in parallel circuit assemblies for heavy duty. Visible indicators of failure of the surge-protection are provided.

REFERENCES:
patent: 3987343 (1976-10-01), Cunningham et al.
patent: 4152743 (1979-05-01), Comstock
patent: 4335415 (1982-06-01), Hooberry
patent: 4439806 (1984-03-01), Reitz
patent: 4459632 (1984-07-01), Nijman et al.
patent: 4502089 (1985-02-01), Ozawa et al.
patent: 4587588 (1986-05-01), Goldstein
patent: 4689597 (1987-08-01), Galloway et al.

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