Switching device for an on-load tap changer

Details Switching device for an on-load tap changer Switching device for an on-load tap changer

1994-10-19

1996-01-30

Recla, Henry J.

Electricity: circuit makers and breakers

Contact moved by sudden release of stored energy,

74 2, 200 48R, 200 49, 200411, 200424, 200427, 200429, 200430, 200440, H01H 508

Patent

active

054882125

ABSTRACT:
Disclosed is a switching device for a tap changer comprising an input lever and an output lever rotatably attached to a shaft. The output lever is provided for making contact with a selected one of a first tap and a second tap. The output lever has a cammed surface at its base for securing a position of the output lever to make contact with the first tap and for preventing the output lever from rotating about the shaft. The device also includes a spring for pulling the output lever toward the input lever, and a clutch, rotatably attached to the shaft, which has a slot. A latching apparatus engages the clutch. The device further includes a pin which is fixedly attached to the input lever and disposed within the slot. The pin drives the clutch to engage the latching apparatus. In operation, after the input lever has been pulled away from the output lever by a predetermined angle, the pin drives the clutch to engage the latching apparatus, thereby freeing the cammed surface from the latching apparatus. This allows the output lever to freely rotate. The output lever is then pulled by the spring toward the input lever to make contact with the second tap.

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