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From page 32... ... 32 Case Example Questionnaire A P P E N D I X C TCRP Synthesis J-7/Topic SD-05/Third Rail Insulator Failures-Current State of the Practice This questionnaire is intended to gather information on Third Rail Insulator Failures-Current State of the Practice so that transit agencies can learn from these experiences. Responses will be used to inform a Transit Cooperative Research Program (TCRP) Read the entire page →
From page 33... ... Case Example Questionnaire 33 Agency Information and Size 2. Please tell us some basic information about your transit system. Read the entire page →
From page 34... ... 34 Third Rail Insulator Failures: Current State of the Practice General Information About Third Rail Insulator[s] Read the entire page →
From page 35... ... Case Example Questionnaire 35 7. What are the failure rates in insulators in your legacy track systems? Read the entire page →
From page 36... ... 36 Third Rail Insulator Failures: Current State of the Practice 9. What are the clearance distances around and above the installation of the insulator? Read the entire page →
From page 37... ... Case Example Questionnaire 37 12. What is the delay time accrued annually due to insulator failures? Read the entire page →
From page 38... ... 38 Third Rail Insulator Failures: Current State of the Practice 15. Does your system employ voltage regeneration? Read the entire page →
From page 39... ... Case Example Questionnaire 39 18. What are the makes/models of the third rail insulators used in your system? Read the entire page →
From page 40... ... 40 Third Rail Insulator Failures: Current State of the Practice Cleaning Insulator Methods 20. Does your agency adopt any surface cleaning technologies? Read the entire page →
From page 41... ... Case Example Questionnaire 41 22a. If yes, what cleaning system requirements were developed in your agency? Read the entire page →
From page 42... ... 42 Third Rail Insulator Failures: Current State of the Practice 25. How much time does it take to clean one insulator? Read the entire page →
From page 43... ... Case Example Questionnaire 43 Cost of Insulator Failure 28. What are the average costs of insulators of different materials? Read the entire page →
From page 44... ... 44 Third Rail Insulator Failures: Current State of the Practice Causes of Insulator Failure 30. What are the causes of failures, types of insulators, and estimated frequency of each type of failure? Read the entire page →
From page 45... ... Case Example Questionnaire 45 Defective product/material (like improper glazing) Mechanical stress System voltage fluctuations/Electrical stress Damage from impact Sunlight/UV Snow and ice accumulation Other Read the entire page →
From page 46... ... 46 Third Rail Insulator Failures: Current State of the Practice 31. What are the failure rates of newer/replaced track systems installed with improved infrastructure designs, installation methods, and components? Read the entire page →
From page 47... ... Case Example Questionnaire 47 34. Does saltwater from deicing roads adjacent to the tracks or over bridges drip or splash onto the insulators? Read the entire page →
From page 48... ... 48 Third Rail Insulator Failures: Current State of the Practice 37. Has your agency established a dedicated maintenance crew to clean tunnel walkways of debris? Read the entire page →
From page 49... ... Case Example Questionnaire 49 39a. If yes, please describe. Read the entire page →
From page 50... ... 50 Third Rail Insulator Failures: Current State of the Practice 42. What methods does your agency employ to predict failures of insulators? Read the entire page →
From page 51... ... Case Example Questionnaire 51 46. Does your agency conduct research and develop improved designs and materials that might reduce the maintenance requirements of the insulators? Read the entire page →
From page 52... ... 52 Third Rail Insulator Failures: Current State of the Practice 49. Does your agency frequently update existing regulations? Read the entire page →
From page 53... ... Case Example Questionnaire 53 51a. If yes, please describe how frequently your agency conducts safety compliance inspections and investigations. Read the entire page →
From page 54... ... 54 Third Rail Insulator Failures: Current State of the Practice 53a. If yes, please briefly describe the programs. Read the entire page →
From page 55... ... Case Example Questionnaire 55 ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ Wrap-up, Future Case Studies, and Other Agencies 57. Is there anything else that you would like to tell us about third rail insulation failures and corresponding best practices for mitigating them? Read the entire page →
From page 56... ... 56 Third Rail Insulator Failures: Current State of the Practice ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ If there are any files you can share, please upload here. If there are any files you can share, please upload here. Read the entire page →

From page 32...

... 32 Case Example Questionnaire A P P E N D I X C TCRP Synthesis J-7/Topic SD-05/Third Rail Insulator Failures-Current State of the Practice This questionnaire is intended to gather information on Third Rail Insulator Failures-Current State of the Practice so that transit agencies can learn from these experiences. Responses will be used to inform a Transit Cooperative Research Program (TCRP)