Load tap changer position sensor

Details Load tap changer position sensor Load tap changer position sensor

2011-07-12

2011-07-12

Luebke, Renee (Department: 2833)

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

Reexamination Certificate

active

07977588

ABSTRACT:
An on-load tap changer position sensor includes a series of radially spaced reed switches and a magnetic indicator that is rotated by a shaft that is coupled directly or indirectly to a load tap changer. As the position of the magnetic indicator changes, the location of the magnetic field created by the magnetic indicator moves. Each reed switch includes a set of contacts that close when in the presence of the magnetic field. The closed contacts create a voltage differential that is detected and used to determine the location of the closed reed switch and thus the position of the on-load tap changer.

REFERENCES:
patent: 3427530 (1969-02-01), Hartwell et al.
patent: 3811023 (1974-05-01), Andersen
patent: 4130789 (1978-12-01), Neumann
patent: 4567763 (1986-02-01), Schiffbauer

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