Linear selector

Patent metadata

Field	Value
Publication number	US-9570248-B2
Application number	US-201414766906-A
Country	US
Kind code	B2
Filing date	Jan 23, 2014
Priority date	Mar 8, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

The invention relates to a linear selector ( 1 ) for power-free preselection of tap contacts for a tapped transformer ( 100 ). The linear selector ( 1 ) according to the invention is cost-effective, simple and compactly constructed. The functions of a selector and a reverser are thus better connected. The linear selector ( 1 ) is constructed from a fine selector ( 2 ) and a reversing switch ( 3 ). The fine selector ( 2 ) and the reversing switch ( 3 ) are directly driven via a common gear unit ( 6 ).

First claim

The invention claimed is:

1. A linear selector for power-free preselection of tap contacts of a tapped transformer comprising:
a fine selector comprising uneven-numbered tap contacts in a first row and even-numbered tap contacts in a second row,
a reversing switch having a switch shaft carrying a first contact fan and a second contact fan; and
a transmission that directly actuates a single contact slide to contact the uneven-numbered tap contacts and the even-numbered tap contacts of the fine selector and the first and second contact fans on the switch shaft of the reversing switch.

2. The linear selector according to claim 1 , wherein the transmission comprises:
a Geneva wheel,
a first bevel gear,
a second bevel gear drivable by the first bevel gear,
a transmission shaft fixedly connecting the Geneva wheel and the first bevel gear for joint rotation, and
traction means carrying the second bevel gear.

3. The linear selector according to claim 2 , wherein the Geneva wheel consists of a Maltese cross that is fixedly seated against relative rotation on a disk that carries at the circumference at a side remote from the Maltese cross a cam that co-operates with a groove of a fork of the switch shaft of the first contact fan and the second contact fan of the reversing switch.

4. The linear selector according to claim 3 , wherein the switch shaft is pivoted by the cam on engagement in the groove of the fork of the switch shaft of the first contact fan and the second contact fan of the reversing switch.

5. The linear selector according to claim 2 , further comprising:
a continuously rotating driver that carries a plurality of rollers that so co-operate with the Maltese cross of the Geneva wheel such that a stepped movement of the Geneva wheel can be produced.

6. The linear selector according to claim 5 , wherein the stepped movement of the Geneva wheel is transmissible by the transmission shaft to the first bevel gear and the second bevel gear and the traction means of the contact slide is linearly actuatable in steps by the traction means shaft.

7. The linear selector according to claim 6 , wherein the traction means has an entraining pin that is so mechanically fixedly connected with the contact slide that the contact slide is movable vertically by the traction means.

8. The linear selector claim 1 , wherein the contact slide has a first contact arm with a sliding contact pair and a second contact arm with a sliding contact pair such that an electrically conductive connection between the vertically spaced uneven-numbered tap contacts and a first diverter contact is producible by the first contact arm and the sliding contact pair thereof and an electrically conductive connection between the vertically spaced even-numbered tap contacts and a second diverter contact is producible by the second contact arm by the sliding contact pair thereof.

9. The linear selector according to claim 8 , wherein an electrically conductive connection between one of the uneven-numbered tap contacts and the first diverter contact and/or between one of the even-numbered tap contacts and the second diverter contact is producible by stepped vertical movement of the contact slide via the traction means.

10. The linear selector according to claim 1 , wherein the first contact fan and the second contact fan of the reversing switch are axially offset on the switch shaft, the first contact fan and the second contact fan each having a respective sliding contact pair, the selector further comprising:
three reversing contacts in a horizontal plane of a first arcuate curve and associated with the first contact fan, and
three reversing contacts in a horizontal plane of a second arcuate curve and associated with the second contact fan.

Assignees

• Reinhausen Maschf Scheubeck

Inventors

• Raith Andreas
• Eberle Andreas

Classifications

• H01H9/0005

  Tap change devices · CPC title

• H01H9/0016 Primary

  Contact arrangements for tap changers · CPC title

• H01H9/0027

  Operating mechanisms · CPC title