File:Tpst.jpg

DescriptionTpst.jpg	Triple Pole Single Throw (TPST) switch
Date	17 June 2004
Source	Own work
Author	Glogger
Permission (Reusing this file)	I, the copyright holder of this work, hereby publish it under the following licenses: Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/3.0CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue You may select the license of your choice.

Triple Pole Single Throw (TPST) switch used to "park" a 3 phase Lakota (True North Power) wind turbine.

3 Phase 60 Amp knife switch used in the ribbon cutting ceremony for the "Switch Opening" reception of 2004 June 17th, for the Urbine project. This switch was selected, in part, because of its epistemological value, i.e. that its function is made visible by the open design in which we can see the handle that holds the three knife elements to switch them simultaneously.

This picture is from the ribbon-cutting and switch opening ceremony for the rooftop urban beach opening, 2004 June 17th.

Various officials and political leaders attended the ribbon cutting ceremony and set the windmill into motion by cutting the ribbon.

The ribbon was a ribbon cable that shorted out all three phases of the windmill, wind turbine, stopping it from turning. Cutting the ribbon effectively opens the windmill brake switch, by removing the short.

Additional pictures of this switch can be found in Switch opening and ribbon cutting ceremony.

The control box also has a switch on it to do the same function, i.e. when the switch is closed, the windmill is in the stopped (locked) position.