TRANSIT RAPID TRANSIT SYSTEM EXTENSIONS COMPENDIUM OF DESIGN CRITERIA VOLUME III AERIAL GUIDEWAY DESIGN CRITERIA CHAPTER 4 ELECTRICAL DESIGN CRITERIA INTERIM RELEASE REV 1 OCTOBER 30, 2008 PROGRAM MANAGEMENT CONSULTANT – Intentionally Left Blank – TRANSIT – Intentionally Left Blank – VOLUME III – AERIAL GUIDEWAY CHAPTER 4 – ELECTRICAL INTERIM RELEASE REV 1 TRANSIT DOCUMENT REVISION RECORD ISSUE NO. DATE REVISION DESCRIPTIONS 0 5-8-07 Interim Release 1 10-30-08 Revisions to incorporate MIC-EH design specifications that have been adopted by MDT. ISSUE NO. SECTIONS CHANGED 1 4.05.1.1 Corrosion Control -Scope- (grammar correction) 4.05.1.2 Corrosion Control -Scope- included other utilities within list 4.05.2.3 Corrosion Control -Electrical Equipment - FRE only for Traction Power. 4.05.3.1.A.1 Corrosion Control - Stray Current Corrosion Control - Stray Current Control – (grammar correction) 4.05.3.1.A.5a&b Corrosion Control - Stray Current Corrosion Control - Stray Current Control 4.05.3.1.B.3 Corrosion Control - Stray Current Corrosion Control - Stray Current Control – (formatting correction) 4.05.3.2.F Corrosion Control - Stray Current Corrosion Control – Utilities – (formatting correction) 4.05.5.2 Corrosion Control - Test Stations - Ground Fault Monitoring Stations 4.06.1 Systems-Facilities Interface Raceway - Scope 4.06.2.9.B Systems-Facilities Interface Raceway - Physical Relationships - Wayside Facilities 4.06.2.10.B Systems-Facilities Interface Raceway - Physical Relationships - Raceway Transitional Areas 4.06.3.2.C Systems-Facilities Interface Raceway - Physical Installation - Construction Guidelines - Traction Power Pullboxes 4.06.4.3.C Systems-Facilities Interface Raceway - Materials of Construction-Application of Raceway-Cableway 4.06.5.2.A Systems-Facilities Interface Raceway -Raceway Identification Methods - Raceway Designations VOLUME III – AERIAL GUIDEWAY CHAPTER 4 – ELECTRICAL INTERIM RELEASE REV 1 TRANSIT ISSUE NO. SECTIONS CHANGED 4.06.5.2.C Systems-Facilities Interface Raceway -Raceway Identification Methods - Raceway Designations Figures 4-1a - Single Guideway Structure, Grounding and Stray Current Diagram; 4-1b - Dual Track Guideway Structure, Grounding and Stray Current Diagram; 4-1c - Guideway Sructure, Grounding and Stray Current Notes; 4-2 - Column Mounted Stray Current Test Box Rev. 1; 4-7 - Sections & Details; 4-8 - Sections & Details, Rev 1 VOLUME III – AERIAL GUIDEWAY CHAPTER 4 – ELECTRICAL INTERIM RELEASE REV 1 TRANSIT VOLUME III - GUIDEWAY DESIGN CRITERIA CHAPTER 4 - ELECTRICAL DESIGN CRITERIA REVISION 1 Table of Contents Page No. 4.01 GENERAL............................................................................................................ 1 4.01.1 PURPOSE ..................................................................................................... 1 4.01.2 BASIC GOALS.............................................................................................. 1 4.01.3 SCOPE .......................................................................................................... 1 4.01.4 INTERFACE DEFINITION AND CONTROL.................................................. 2 4.01.5 CODES, STANDARDS AND REGULATIONS.............................................. 3 4.01.6 RESERVED ................................................................................................... 4 4.02 ELECTRICAL SYSTEMS..................................................................................... 5 4.03 FACILITIES SUPERVISORY CONTROL, STATUS AND ALARM REQUIREMENTS................................................................................................. 7 4.04 GROUNDING AND LIGHTNING PROTECTION ................................................. 9 4.04.1 SCOPE .......................................................................................................... 9 4.04.2 OBJECTIVE ................................................................................................ 10 4.04.3 ABNORMAL CONDITIONS ........................................................................ 10 4.04.4 GROUNDING ELECTRODE SYSTEM........................................................ 11 4.04.4.1 Main Line Facilities............................................................................... 11 4.04.5 TRACTION POWER GROUNDING............................................................. 14 4.04.5.1 General ................................................................................................ 14 4.04.6 SECONDARY POWER DISTRIBUTION SYSTEM GROUNDING .............. 17 4.04.6.1 General ................................................................................................ 17 4.04.7 GROUNDING NETWORKS......................................................................... 19 4.04.7.1 Signal Grounding Networks.................................................................. 19 4.04.7.2 Chassis Grounding Network................................................................. 19 4.04.7.3 Guideway Grounding ........................................................................... 20 4.04.7.4 Fences ................................................................................................. 22 4.04.8 LIGHTNING PROTECTION......................................................................... 23 4.05 CORROSION CONTROL................................................................................... 25 4.05.1 SCOPE ........................................................................................................ 25 4.05.2 CONTROL OF ATMOSPHERIC CORROSION........................................... 25 4.05.2.1 Materials of Construction...................................................................... 26 4.05.2.2 Coatings............................................................................................... 26 4.05.2.3 Electrical Equipment ............................................................................ 28 4.05.2.4 General Construction ........................................................................... 29 4.05.3 STRAY CURRENT CORROSION CONTROL............................................. 29 4.05.3.1 Stray Current Control ........................................................................... 30 4.05.3.2 Utilities ................................................................................................. 33 4.05.4 CATHODIC PROTECTION ......................................................................... 35 VOLUME III – AERIAL GUIDEWAY i CHAPTER 4 – ELECTRICAL INTERIM RELEASE REV 1 TRANSIT 4.05.4.1 Introduction .......................................................................................... 35 4.05.4.2 Galvanic Anodes .................................................................................. 35 4.05.4.3 Impressed Current System................................................................... 35 4.05.5 TEST STATIONS......................................................................................... 38 4.05.5.1 Test Boxes Installations ....................................................................... 38 4.05.5.2 Ground Fault Monitoring Stations......................................................... 39 4.05.6 CORROSION CONTROL OF MECHANICAL EQUIPMENT....................... 39 4.05.7 MISCELLANEOUS ITEMS.......................................................................... 39 4.05.7.1 Communication, Power and Control Cables......................................... 39 4.06 SYSTEMS-FACILITIES INTERFACE RACEWAY............................................. 41 4.06.1 SCOPE ........................................................................................................ 41 4.06.2 PHYSICAL RELATIONSHIP ....................................................................... 42 4.06.2.1 General ................................................................................................ 42 4.06.2.2 Guideways ........................................................................................... 45 4.06.2.3 Ancillary Spaces................................................................................... 47 4.06.2.4 Platform and Under-Platform Areas ..................................................... 50 4.06.2.5 Concourse Area ................................................................................... 50 4.06.2.6 Station Attendant's Booth/Console....................................................... 51 4.06.2.7 Traction Power Substation ................................................................... 51 4.06.2.8 Gap Tie Stations .................................................................................. 53 4.06.2.9 Wayside Facilities ................................................................................ 55 4.06.2.10 Raceway Transitional Areas................................................................. 57 4.06.3 PHYSLCAL INSTALLATION ...................................................................... 58 4.06.3.1 General ................................................................................................ 58 4.06.3.2 Construction Guidelines ....................................................................... 58 4.06.4 MATERIALS OF CONSTRUCTION ............................................................ 61 4.06.4.1 General ................................................................................................ 61 4.06.4.2 Material Nomenclature ......................................................................... 61 4.06.4.3 Application