High-voltage single-shot circuit-protecting device with fuse-lik

Details High-voltage single-shot circuit-protecting device with fuse-lik High-voltage single-shot circuit-protecting device with fuse-lik

1978-02-27

1981-06-23

Scott, James R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

200144R, 200148A, 361 14, 361115, H02H 300, H01H 3382, H01H 7300

Patent

active

042754313

ABSTRACT:
An improved high-voltage, single-shot circuit-protector device, having fuse-like characteristics, and having a chemical operating mechanism, is provided to protect, at low-cost, transmission-line circuits. Preferably, the device contemplates the use of a single-pressure puffer-interrupter having a driving piston attached to the movable contact structure and operated by a chemical operator having an explosive element. Also, preferably, the aforesaid device is self-contained and self-operable, utilizing, preferably, a current-transformer, which triggers a self-contained static control circuit, the latter effecting the "firing" of the explosive element of the chemical operator to thereby generate gas pressure very quickly, and thus effect an opening operation of the contact-operating piston and the attached movable contact structure. For repetitive use, a manual reset lever is preferably provided which is capable of manual hook-stick operation. The chemical operator element is replaceable, being also capable of manual hook-stick replacement by service personnel.

REFERENCES:
patent: 3700970 (1972-10-01), Miyoshi

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