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(11) | EP 0 199 494 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Energy storage apparatus for a load tap selector |
| (57) An energy storage apparatus for a load tap selector has a rotating input frame 13
which is concentrically disposed with respect to a rotating output frame 12 to which
is connected an output shaft 13 which operates a load switching movable contact. The
input frame and the output frame each have a pair of flanges 14-17 which extend in
opposite radial directions and which overlap one another in the radial direction.
An energy storage spring 4 which is disposed between the flanges has engaging members
18, 19 secured to opposite ends which are capable of releasably engaging with recesses
formed in the flanges. When the input frame is rotated from a first position to a
second position while the output frame is restrained in the first position. one end
of the spring is restrained by engagement with the flanges on the output frame while
the other end of the spring is moved together with the input frame by engagement with
the flanges on the input frame. thereby stretching the spring and storing energy.
When the restraint of the output frame is released, the energy which was stored in
the spring is released and the output frame and the output shaft are rotated at a
high speed to operate the load switching movable contact. |