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ZS 001 Substation Equipment—Power Transformer, All Ratings and ZS 001A Substation Equipment— Transformer-Specific Requirements

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Material Specification ZS 001 Substation Equipment—Power Transformer, All Ratings and ZS 001A Substation Equipment— Transformer-Specific Requirements Substation & Civil Engineering Date: 26 Oct 15 © 2015 by MidAmerican Energy / PacifiCorp. All rights reserved. Project Issue Date:__________ Company Project Info Attachment to Exhibit ________, Section ________, Attachment No. _____ Project Name: ______________________________________________ Edited By: _________________________________________________ Material Specification ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements ©2015 by PacifiCorp. ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements ZS 001 Substation Equipment—Power Transformer, All Ratings 1 1.Scope 1 2.References 1 2.1. Industry Publications 1 2.2. Company Publications 2 3.General 2 3.1. Application Information 2 3.2. Pre-Qualified Accessory Suppliers 2 4.Standard Conditions, and Other Service Factors 3 4.1. Type 3 5.Rating Data 3 5.1. Kilovolt Ampere (kVA) Ratings 3 5.2. Ratings of Transformer Taps 4 5.3. Transformer Bank and Parallel Operation 4 5.4. Losses 4 5.4.1.Loss Penalty 4 6.Construction 5 6.1. Core Design Requirements 5 6.1.1.Steel Specification 5 6.1.2.Flux Density 5 6.1.3.Audible Sound Level 5 6.1.4.Core Temperature 5 6.1.5.Core Construction and Tie Plate Stress 6 6.1.6.Core Ground 6 6.1.7.Cooling Ducts 6 6.2. Winding and Insulation Design Requirements 7 6.2.1.Conductors 7 Material Specification Page ii of xii ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements Published Date: 26 Oct 15 Last Reviewed: 26 Oct 15 ©2015 by PacifiCorp. ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements 6.2.2.Insulation Structures 7 6.2.3.Oil Gap Design 8 6.2.4.Coil Design 8 6.2.5.Shell Form Design 9 6.3. De-Energized Tap Changers, Switches, and Terminal Boards 10 6.3.1.Tap Changers and Reconnection Switches 10 6.3.2.Reconnection Terminal Boards 10 6.4. Liquid Temperature Indications 11 6.5. Winding Temperature Indication 11 6.5.1.Temperature Monitor 11 6.5.2.Resistance Temperature Detectors 11 6.5.3.Winding Temperature Current Transformers 12 6.5.4.Temperature Monitor Settings and Control Connections 12 6.6. Pressure-Vacuum Gauge 12 6.7. Pressure-Vacuum Valve 12 6.8. Oil Level Indication 12 6.9. Pressure-Relief Device 12 6.10. Valves 13 6.11. Sudden Pressure Relay 13 6.12. Bushings 13 6.12.1.Bushings for Buried Y-Terminals 14 6.13. Clearances 14 6.14. Bushing Current Transformers 15 6.15. Neutral Connections 15 6.16. Moving Facilities 15 6.17. Nameplate 15 6.17.1.Main Transformer Nameplate 15 Material Specification Page iii of xii ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements Published Date: 26 Oct 15 Last Reviewed: 26 Oct 15 ©2015 by PacifiCorp. ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements 6.17.2.Valve Identification and Location Nameplate 16 6.17.3.Field Oil-Filling Procedure Nameplate 16 Table 1—Field Oil-Filling Procedure for a Transformer with a Conservator System 17 Figure 1—Valve Location Schematic Drawing 18 Table 2—Initial Valve Positions For Pulling Vacuum 18 6.18. Liquid Insulation System 19 6.18.1.Insulating Liquids 19 6.18.2.Insulating Liquid Preservation System 19 6.18.3.Gas Collection Design 19 6.18.4.Dissolved Gas Monitor 20 6.18.5.Alarm Monitor 20 6.19. Tanks 21 6.19.1.Tank Exterior Finish and Porcelain Color 21 6.19.2.Tank Interior Finish 21 6.20. Fall Arrest Equipment 21 6.20.1.Capital Safety Mast Anchor 22 6.20.2.Pelsue Safety Mast Anchor 22 6.20.3.Safety Railing Equipment 22 Figure 2—Safety Railing System Overview 24 Figure 3—Safety Railing Post and Kickboard Detail 25 6.20.4.Exposed Fasteners and Hardware 25 6.20.5.Accessory and Spare Part Storage 26 6.21. Auxiliary Cooling Equipment 26 6.22. Power Supply for Transformer Auxiliary Equipment 27 6.23. Low-Voltage Terminal Chamber 27 6.24. Surge Arresters 28 6.25. Load Tap Changer (LTC) 28 Material Specification Page iv of xii ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements Published Date: 26 Oct 15 Last Reviewed: 26 Oct 15 ©2015 by PacifiCorp. ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements 6.25.1.Tap Voltages 28 6.25.2.Tap Selector Switch 28 6.25.3.Oil-Filled Tap Changer Compartment 28 6.25.4.Line Drop Compensator Current Transformers 28 6.25.5.Remote Indication of Tap Position 29 6.25.6.Remote Control of Tap Position 29 6.25.7.Automatic Control of Tap Position 29 6.25.8.LTC Alarms 30 6.25.9.Control Wiring 30 6.26. Control Cabinet 31 7.Tests 32 7.1. General 32 7.2. Routine Tests 32 7.2.1.Positive-Sequence Impedance Test Clarification 33 7.2.2.No-Load Loss and Excitation Current Test Clarification 33 7.2.3.Insulation Resistance Test Clarification 33 7.2.4.Power Factor and Excitation Current Test Clarification 33 7.2.5.Partial Discharge Measurement Test Clarification 33 7.2.6.Temperature Rise Test 33 7.2.7.Test Data Required for Temperature Monitors 34 7.3. Optional Tests 35 7.3.1.Auxiliary Wiring Test Clarification 36 7.3.2.Overload Test Clarification 36 7.3.3.Infrared Picture 37 7.4. Frequency Response Analysis Test Requirements 37 7.5. Unintentional Core Ground Test Requirements 38 7.6. Core-Form Clamping System Tightness 38 Material Specification Page v of xii ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements Published Date: 26 Oct 15 Last Reviewed: 26 Oct 15 ©2015 by PacifiCorp. ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements 7.7. Gas Collection Test 38 7.8. Test Sequence 38 7.9. Surge Protection Devices 39 7.10. Test Bushings 39 7.11. Dissolved Gas Analysis 39 Table 3—Dissolved Gas Limits 39 8.Technical Documentation 40 8.1. Drawing Types 40 8.1.1.Review Drawings 40 8.1.2.Final-for-Manufacturing Drawings 41 8.1.3.As-Built Drawings 41 8.1.4.AutoCAD Drawings 42 8.2. Technical Documentation Description 42 8.2.1.Certification of Insulating Oil 42 8.2.2.Certified Test Report 42 8.2.3.Outline Drawing 42 8.2.4.Nameplate and Instruction Plate Drawings 42 8.2.5.Bushing Outline Drawings 43 8.2.6.Surge Arrester Outline Drawings 43 8.2.7.Schematic and Wiring Diagrams 43 8.2.8.Current Transformer Nameplate Drawings 43 8.2.9.Current Transformer Information 43 8.2.10.Instruction Manuals 43 8.2.11.Spare Parts 43 8.2.12.Final Drawings 44 8.2.13.Geomagnetic Disturbance Withstand Calculations 44 9.Shipping Requirements 44 Material Specification Page vi of xii ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements Published Date: 26 Oct 15 Last Reviewed: 26 Oct 15 ©2015 by PacifiCorp. ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements 9.1. Air-Filled or Oil-Filled 44 9.2. Factory Assembly and Component Location Marking 44 9.3. Shipping Crates 45 9.4. Notification of Shipment 45 9.5. Impact Recorders 46 9.6. Acceleration Forces 46 9.7. Rail Shipment 46 9.7.1.Unloading Allowance 46 9.7.2.Supplier Representative 46 9.7.3.Shipping Cover 47 10.Other Inspection Requirements 47 10.1. Design Review 47 10.2. Quality Assurance Inspections and Surveillance 47 10.2.1.Cooperation with Quality Surveillance Representative 48 10.3. Inspection Photographs 48 10.4. Field Engineer 48 11.Evaluation 48 11.1. Loss Evaluation Method 48 11.2. Loss Cost Multipliers 49 11.3. Method of Shipment 49 12.Warranty 50 13.Issuing Department 50 Appendix A—Schedule of Pre-Qualified Suppliers 51 Table A1—List of Pre-Qualified Material Suppliers 51 Appendix B—Qualitrol 509 Details 56 Appendix B.1—Qualitrol 509 Winding Current Transformers 56 Appendix B.2—Qualitrol 509 Temperature Monitor Settings and Control Connections 57 Material Specification Page vii of xii ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements Published Date: 26 Oct 15 Last Reviewed: 26 Oct 15 ©2015 by PacifiCorp. ZS 001—Substation Equipment—Power Transformer, All Ratings ZS001A—Substation Equipment—Transformer-Specific Requirements Appendix B.3—Qualitrol 509 Temperature Monitor Test Data Sheet 59 Table B3—Winding Transformers, 3-Winding Transformers with Buried Tertiaries, or Auto- transformers with Buried Tertiaries Only 59 Table B4—Winding Transformers with Brought-Out Tertiaries, or Autotransformers with Brought-Out Tertiaries Only 60 Appendix C—Schweitzer SEL-2414 Details 61 Appendix C.1—Schweitzer SEL-2414 Winding Current Transformers 61 Appendix C.2—Schweitzer SEL-2414 Temperature Monitor Settings and Control Connections 63 Appendix D— Transformer Test Summary Sheet 66 ZS 001A Substation Equipment—Transformer-Specific Requirements 67 1.Requirements 67 2.General Requirements 67 3.Equipment Identification and Order Requirements 67 3.1. Supplier's Representative 67 3.2. Field Engineer 67 4.Service Conditions 68 4.1. Ambient Temperature 68 4.2. Elevation 68 4.3. Seismic Capability 68 4.4. Contaminated Environment Protection 68 4.5. Unusual Service Conditions 68 5.Service Class 69 5.1.
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