:::Home Sitemap Search Contact Us 中文版
HSR and TRA Technical Exchange Activity - Train Scheduling Procedure Seminar08/25/2017
Summary of the Visits to Railway Research and Testing Organizations08/25/2017
The 11th Financial Audit of HSR Project Operational Phase08/25/2017
High-speed Rail Service Upgrade-Wi-Fi Equipment Installation08/25/2017
Summary of the 5th Taiwan-Japan Railway Practical Interchange & Cooperation Meeting07/25/2017
Forward-Looking Infrastructure Development Program- Railway Construction Tour Seminar07/25/2017
Minister of MOTC Hochen Led the Media to Experience the Yunlin and Chiayi Sugar Railway06/26/2017
Flash Event of the Opening of TIAA MRT Public Art Project-“Interaction Crossing Zone”05/25/2017
Turnouts for Dummies 3: Snap switch 05/27/2015
Designated (land) area near Taoyuan, Hsinchu, Taichung, and Tainan Station of the Taiwan High Speed Rail, that has been successfully marked.09/07/2011
Contract Signing of Automatic Fare Collection System Works for Taoyuan International Airport Access MRT with Contractor10/22/2010
The Groundbreaking Ceremony of Power Supply System for Taoyuan International Airport Access MRT System Construction Project 10/01/2010
“Development and Operation Project of Special Industrial Zone of HSR Taoyuan Station District” Requests for Opinions from Vendors09/30/2010
Two Lots in HSR Hsinchu Station Designated Zone Successfully Sold by Tender09/29/2010
“Tendering Lease of Commercial Zone Land No. 28 and 31 of HSR Taichung Station Area” is won by Nanrenhu Group09/16/2010
Tendering Lease of Commercial Zone Land No. 51 and 57 of HSR Taichung Station Area09/14/2010
Taiwan High Speed Rail Annual Inspection09/10/2010
Construction of main line demonstration track on TIAA MRT Project was
Successful sale by tender of six parcels of land in the HSR Taoyuan Station Designated Zone by BOHSR, MOTC08/25/2010
BOHSR Announces Sale by Tender of Land in the HSR Hsinchu Station District08/19/2010
HSR switch malfunction 08/10/2010
BOHSR Responds to Report "The TIAA MRT Project Vast Excavation Leaves Public at Risk"08/05/2010
Explanation of the signal abnormality occurring at HSR turnout 1072 in Taipei on July 29, 2010 07/30/2010
Express trains on the TIAA MRT will still stop at the Wugu Industrial Park Station and Chang Gung Memorial Hospital Station. 07/25/2010
Cross passage of Shield Tunnel of Airport MRT & Bamboo-Cutting foundation Are to Be Completed with Great Expeditiousness07/23/2010
Operation status after THSR Issued Multi-ride and Periodic Tickets in July.07/23/2010
HSR Maintenance Vehicle Derailing Accident07/14/2010
BOHSR to sell land in the HSR Taoyuan Station District by tender07/02/2010
The Salaries of THSRC High Kevel Managers06/24/2010
While maintaining operating safety and passenger comfort, in response to the President's wishes, the Bureau of Taiwan High Speed Rail, MOTC will review the possibility of shortening the travel time of express trains on the TIAA MRT.06/07/2010







Turnouts for Dummies 3: Snap switch :::
Turnouts for Dummies 3: Snap switch
The snap switch is located inside the HSR switch and EPD is used to detect whether the switch rail and crossing of the turnout is tightly adhered to the stock rail. Snap switch modules include single-row (used in EPD), four-row (used in switches) and six-row modules.
Manufacturing defects are the major cause of snap switch malfunctions that will result in incomplete contact. Incomplete contact at any point will cause short circuit and the signals indicating adhesiveness of the turnout will not be successfully transmitted. Then, the switch will display turnout error leading to malfunction of train operation. When encountering this error, engineers will be dispatched to the site immediately to confirm the error and troubleshoot to restore normal operation as soon as possible. Although the process will cause inconvenience and delay to passengers, operational safety will not be jeopardized.
Currently, measures to improve the troubleshooting process of snap switch errors include: 
1. Enhancing manufacturing Inspection measures- the manufacturing company has implemented improvement measures to the original snap switch manufacturing process and added optical inspection procedure to their QC routine. 
2. Increasing incoming inspection measures- each incoming snap switch will have to pass over 100 tests on the snap switch testing platform performed by THSRC before taken into the warehouse. 
3. Increasing outgoing inspection measures- each snap switch taken out of the warhouse will have to pass over 1000 tests on the snap switch testing platform before being sent to construction site. 
4. Enhancing installation tests- after installation of the snap switch in switches or EPD, the turnout has to be tested over 10 times before official operation.



Bureau of High Speed Rail, MOTC
9F, No. 7, Sec. 2,Sianmin Blvd., Banciao District, New Taipei City, 220, Taiwan R.O.C
TEL : +886-2-8072-3333  FAX : +886-2-89691567
Best viewed with IE 5.01 or higher at 1024 x 768 resolution