Indication Locking Test
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ONLY Inspection and Maintenance of Interlockings Course 206 PREVIEWPARTICIPANT GUIDE COURSE 206: INSPECTION AND MAINTENANCE OF INTERLOCKINGS MODULE 1: OVERVIEW & SAFETY Inspection and Maintenance of Interlockings Participant Guide Signals Maintenance Training Consortium COURSE 206 ONLY PREVIEW DRAFT ● Intended For Use by Transit Elevator/Escalator Consortium Members Only Page i COURSE 206: INSPECTION AND MAINTENANCE OF INTERLOCKINGS MODULE 1: OVERVIEW & SAFETY TABLE OF CONTENTS PAGE How to Use the Participant Guide .................................................................................................... V MODULE 1 OVERVIEW AND SAFETY ................................................................................1 1-1 OVERVIEW ......................................................................................................................2 1-2 SAFETY ............................................................................................................................3 1-3 TOOLS AND MATERIALS .............................................................................................7 1-4 TESTING .........................................................................................................................10 1-5 DOCUMENTATION ......................................................................................................15 1-6 SUMMARY .....................................................................................................................16 MODULE 2 TESTING & MAINTENANCE OF INTERLOCKINGSONLY .................................17 2-1 OVERVIEW ...................................................................................................................18 2-2 GENERAL INSPECTION PROCEDURES...................................................................20 2-3 STEPS FOR PERFORMING VARIOUS LOCKING TESTS .......................................25 2-4 INSPECTION AND TESTING OF INTERLOCKINGS ...............................................36 2-5 MAINTENANCE ...........................................................................................................44 2-6 SUMMARY ....................................................................................................................45 PREVIEW DRAFT ● Intended For Use by Transit Elevator/Escalator Consortium Members Only Page iii COURSE 206: INSPECTION AND MAINTENANCE OF INTERLOCKINGS MODULE 1: OVERVIEW & SAFETY LIST OF FIGURES Page Figure 1.1 Signal Maintainers working at an interlocking ................................................................ 3 Figure 1.2 Portable train detection device being installed on ROW ................................................. 6 Figure 1. 3 Personal alert device (PAD) worn by an employee ........................................................ 6 Figure 1. 4 Work at interlockings located at grade crossings requires public safety precautions ...... 6 Figure 1. 5 Interlocking Tools ............................................................................................................ 8 Figure 1.6 Switch Tools .................................................................................................................... 9 Figure 1.7 Locking Test Form ......................................................................................................... 15 Figure 2.1 Form Used for Locking Tests –courtesy METRA ......................................................... 19 Figure 2.2 Yard Interlocking Signal ................................................................................................ 20 Figure 2.3 Interlocking Junction Box .............................................................................................. 21 Figure 2.4 Impedance Bond Layout ................................................................................................ 21 Figure 2.5 Train Stop....................................................................................................................... 22 Figure 2.6 Local Control Panel Diagram ........................................................................................ 34 Figure 2.7 Local Control Panel .......................................................................................................ONLY 35 Figure 2.8 Signal maintainer shunting a track ................................................................................. 38 Figure 2.9 Mounted Interlocking..................................................................................................... 39 Figure 2.10 Vital Microprocessor Interlocking ................................................................................. 40 Figure 2.11 Power Off Timing Relay ................................................................................................ 41 Figure 2.12 Movable Bridge ............................................................................................................. 42 Figure 2.13 Track Wires .................................................................................................................... 44 Figure 2.14 Switch machine .............................................................................................................. 45 LIST OF TABLES Table 1.1 Locking Tests Precautions Chart ........................................................................................ 11 Table 1.2 Locking Tests, Process, Purpose and Frequency ................................................................ 13 Table 2.1 InterlockingPREVIEW Inspection Summary Chart ............................................................................. 23 DRAFT ● Intended For Use by Transit Elevator/Escalator Consortium Members Only Page iv COURSE 206: INSPECTION AND MAINTENANCE OF INTERLOCKINGS MODULE 1: OVERVIEW & SAFETY Module 1 OVERVIEW AND SAFETY Outline 1-1 Overview 1-2 Safety 1-3 Tools 1-4 Testing 1-5 Documentation 1-6 Summary Purpose and Objectives: The purpose of this module is to provide a review of the safety procedures to be performed during the inspection, testing and maintenance of interlockings. Following the completion of this module, the participant should ONLYbe able to complete the exercises with an accuracy of 70% or greater: • Describe safety procedures and requirements as per location and regulating authority • List tools and testing equipment used in the inspection, testing and maintenance of interlockings • Identify agency specific schedules for interlockings inspection and maintenance • List tests, frequency and purpose of each test per your authority • Describe inspection, maintenance and testing documentation for reporting as per agency regulations Key Terms • Clearing Area • Occupied Track • Designated Flagger Device (Dfd) • On-Track Safety • Flagman • Personal Alert Devices (Pads) • Foul Time • Roadway Worker • InterlockingPREVIEW Junction Boxes • Roadway Worker Protection • Interlocking Signal • Watchman/Lookout DRAFT ● Intended For Use by Transit Elevator/Escalator Consortium Members Only Page 1 COURSE 206: INSPECTION AND MAINTENANCE OF INTERLOCKINGS MODULE 1: OVERVIEW & SAFETY the activity. For example, a signal maintainer should use a vehicle strobe light if available. Be sure to follow your agency’s specific requirements for securing your worksite. Warning: Safety Precautions! • The signal maintainer should always follow regulatory body, OEM, and your transportation authority’s specific requirements for safety when inspecting and testing interlockings. • Always take appropriate actions to secure the work area before performing any inspections/maintenance and testing. • Remember your safety, your co-worker’s safety and the safety of the public depends on you. 1-3 TOOLS AND MATERIALS A signal maintainer is required to have a set of authority-approved tools to clean, test and maintain interlockings. In addition to standard tools carried by maintenanceONLY personnel, the signal maintainer also carries specific tools as they apply to the type of track circuits and interlockings on which they are working. Where applicable, all tools and devices used in testing and maintaining the interlockings must be approved by the rail authority and recommended by the OEM. Cleaning materials such as cloth, lubricants, solvents, brushes, and brooms may also be used. Generally, during the inspection and maintenance of interlockings the following tools are required. Note that the use of these tools and others may vary among rail transit agencies. • Shunt strap • Terminal wrench • Stop watch • Obstruction gauge • Multi-meter (calibrated according to OEM and agency specific guidelines) • Laptop • Switch tools • Portable radio • Relay tester • FeelerPREVIEW gauges DRAFT ● Intended For Use by Transit Elevator/Escalator Consortium Members Only Page 7 COURSE 206: INSPECTION AND MAINTENANCE OF INTERLOCKINGS MODULE 1: OVERVIEW & SAFETY The switch tools (Figure 1.6) depicted here are used in the general inspection, testing and maintenance of interlocking switch machines. TYPICAL OBSTRUCTION LARGE SWITCH TOOL SCREWDRIVER WRENCHES ONLY CUP AND CRANK FEELER TOOL GAUGE Figure 1.6 Switch Tools PREVIEW DRAFT ● Intended For Use by Transit Elevator/Escalator Consortium Members Only Page 9 COURSE 206: INSPECTION AND MAINTENANCE OF INTERLOCKINGS MODULE 1: OVERVIEW & SAFETY Table 1. 2 Locking Tests, Process, Purpose and Frequency Frequency** Locking Testing Process Purpose 1 Test FRA Authority* Traffic • Establish route* This test applies only to periodic (CFR 236.381) Locking testing of traffic locking between interlockings