Abstract A tap changer for transformers includes a selector switch and a diverter switch. The drive device for the switch includes a gear segment which drives a gear wheel mounted on a shaft which gear wheel also carries a slewing bracket on which is pivoted on a pivot pin a link which is connected to one end of a spring, the other end of which is stationary. The gear wheel has a notch extending partly around its periphery, into which the pivot pin extends so that the gear wheel can turn freely through a limited distance without affecting the spring. On the same shaft is mounted a fly wheel which has an arcuate slot into which the pivot pin extends. A braking arrangement is provided which holds the fly wheel against movement until it is forceably turned by the pivot pin. The fly wheel carries a projection which engages in a Maltese cross arrangement for shifting the contacts of the diverter switch.
A tap changer for transformers which comprises a selector switch and a diverter switch, a member (1) for operating said selector switch, means for transmitting movement of said member to said diverter switch for producing rapid movements thereof comprising gear wheel operatively connected to said member, a spring device operatively connected to said gear wheel to be tensioned and released thereby, a flywheel, a first lost-motion connection between said gear wheel and said flywheel, said first lost-motion connection allowing motion of said gear wheel with respect to said flywheel until substantially the beginning of the tensioning of said spring device and, upon release of said spring means, imparting motion to said flywheel, and means operatively connecting said flywheel to the diverter switch.
Claim 2
Dependent Claim
122 words
A tap changer for transformers which comprises a selector switch and a diverter switch, a member (1) for operating said selector switch, means for transmitting movement of said member to said diverter switch for producing rapid movements thereof comprising gear wheel operatively connected to said member, a spring device operatively connected to said gear wheel to be tensioned and released thereby, a flywheel, a first lost-motion connection between said gear wheel and said flywheel, said first lost-motion connection allowing motion of said gear wheel with respect to said flywheel until substantially the beginning of the tensioning of said spring device and, upon release of said spring means, imparting motion to said flywheel, and means operatively connecting said flywheel to the diverter switch.
Claim 3
Dependent Claim
25 words
In a tap changer as claimed in claim 1 the connection between said gear wheel and the spring device being a second lost motion connection.
Claim 4
Dependent Claim
53 words
In a tap changer as claimed in claim 2, said second lost-motion connection comprising a notch in said gear wheel, a part mounted to turn about the axis of rotation of said gear wheel, and a pin carried by said part and extending into said notch and operatively connected to said spring device.
Claim 5
Dependent Claim
25 words
In a tap changer as claimed in claim 3, said first lost-motion connection comprising an arcuate slot in said flywheel into which said pin engages.
Claim 6
Dependent Claim
40 words
In a tap changer as claimed in claim 1, said means connecting said flywheel to said diverter switch being operative during the part only of the motion of said flywheel which is produced during said release of said spring means.