Topic 32 TURNOUT TESTING Turnout Testing During USFD

Topic- 32 TURNOUT TESTING

Turnout Testing During USFD testing of Turnout, in switch portion the guide roller of Rail tester hinders the movement of trolley, hence the complete testing of Tongue rail is not possible using the Rail Tester. For USFD Testing of in service Stock Rail and Tongue Rail of Points and Crossing, The Tongue Rail is demarcated in 3 different Zones - I To go through the Animation Click on the Button To go through the Vedio Click on the Button Zones - III Para No- 10. 6 of Revised USFD Manual-2012.

Turnout Testing Zones - I

Turnout Testing Zones - I

Turnout Testing A point where Probe of 20 mm crystal can be suitably placed on Tongue Rail Head Zones - II

Turnout Testing A point where Probe of 20 mm crystal can be suitably placed on Tongue Rail Head Zones - III

Turnout Testing Sr. No Zone Item Description 1. Zone-I Where full width of Rail. Covered in Normal rail testing as stipulated. 2. Zone- II Up to the point on Head where Probe of 20 mm crystal can be suitably placed. 3. Zone- III Rest portion of Tongue Rail. Defect Classification Action Taken SSE/JE (USFD) shall impose 30 kmph or stricter speed For USFD testing Turnout restriction shall be considered in Shall be tested immediately and vulnerable location hence Manually using 70˚ (2 inform to SSE/JE any defect which can be Mhz) S/C Probe (P. way) who will classified as per Annexurereplace the flawed 2 A, shall be marked as IMR portion within 3 days This Part of Tongue of detection. Rail shall be examined Visually. Para No- 10. 6 of Revised USFD Manual-2012.

Turnout Testing NOTECMS crossing : - USFD testing is not applicable on CMS crossing. However it should be closely obseved by Keyman during his daily patrolling duty for any crack/visual defect. Para No- Book of RDSO, Item No. 15