High voltage grounding switch requiring low operating effort

Details High voltage grounding switch requiring low operating effort High voltage grounding switch requiring low operating effort

1976-06-24

1978-07-25

Hunt, Brooks H.

Electricity: circuit makers and breakers

High-potential type

Rotating and pivoted

200 48A, 200 5113, H01H 3100

Patent

active

041031229

ABSTRACT:
A high voltage grounding switch adapted to ground high voltage power lines or other electrical equipment is provided with a two-part blade having toggle type action, with the toggle joint placed near the hinge pivot. The blade is then rotated from a fully opened position toward a closed position in which the blade end engages an overhead jaw type contact. The engagement of the blade end with a stop which is adjacent the jaw contact straightens the toggle and forces sliding engagement between the blade end and the jaw contact in an axial direction relative to the blade axis. A counterbalancing spring is connected from the switch support to the blade in order to at least partly balance the blade mass and to maintain the blade in a toggle-collapsed condition. The telescoping action of the blade in its stationary jaw contact provides a mechanical stop against blowout forces produced by fault currents.

REFERENCES:
patent: 1919065 (1933-07-01), Jacobs
patent: 2227925 (1941-01-01), Cornell et al.
patent: 2806097 (1957-09-01), Hoye
patent: 3566061 (1971-02-01), Bernatt

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