City Of Ottawa High Voltage Substation Inspection, Maintenance Rev July 17 and Testing, ROPEC Page 1
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1 2015 July 17 and Testing, ROPEC Page 1 PART 1 GENERAL 1.1. Scope.1 Equipment replacement and testing for a 44 kv 4.16kV/600V substation: a. Replacement of Insulators as indicated on the drawings in Appendix A. 30 strings of suspension insulators and 18 units of post insulators. b. Replacement of Lightning Arrestors as indicated on the drawings in Appendix A. 6 units of arrestors. c. Replacement of existing fuses with new fuses. 15 units of fuses. d. Electrical tests to commission the replaced equipment..2 The contractor shall provide qualified services, or shall engage the services of a specialized, qualified contractor, for the purpose of performing inspections and tests as herein specified..3 The contractor, or specialized testing firm, shall provide all material, equipment, labor, and technical supervision to perform such installations and tests..4 The contractor will arrange and pay for all required isolations, maintenance and inspection certificates for their scope of work References The work shall be performed in accordance with the latest laws, codes and standards, not limited to the following:.1 CSAC22.1 Canadian Electrical Safety Code.2 Ontario Electrical Safety Code Latest edition.3 IEEE Std C57 Standards Collection.4 NETA, MTS-2011 Maintenance Testing Specification for Electrical Power Distribution Equipment and Systems. Where these codes, standards and reference conflict, comply with the most stringent condition Qualifications of Contractor Firm.1 The contractor firm shall be regularly engaged in the construction and maintenance of high voltage electrical equipment devices, installations, and systems..2 All employees of the contractor shall be qualified as per CSA Z462 requirements..3 The contractor shall have at least one person on site with one of the following qualifications to provide technical supervision and/or guidance as required for the remainder of the testing personnel: 1
2 2015 July 17 and Testing, ROPEC Page 2 a. An employee certified by the InterNational Electrical Testing Association (NETA), or; b. A Professional Engineer (P. Eng) licensed in the Province of Ontario with specialized training and experience in the testing and inspection of electrical power distribution equipment, or; c. A member of the Ontario Association of Certified Engineering Technicians and Technologists (OACETT) with specialized training and experience in the testing and inspection of electrical power distribution equipment..4 The contractor is to supply the Client, within 10 business days of awarding of contract, the name and qualifications of the proposed on-site supervisor. Approval, in writing from the Client, is required if the contractor needs to change the on-site supervisor for any reason..5 All work shall be performed by the employees qualified to install, test, and commission high and low voltage electrical equipment..6 The contractor to supply the Client with a list of people proposed for site work with their qualifications at least 10 business days before the scheduled test date. The Client will have the right to reject candidates not meeting the above qualifications..7 The contractor must have the necessary materials, equipment, tools, instruments, measuring devices and all other tools necessary to carry out the full scope of work..8 In the case where utility coordination/isolation is required the contractor firm shall be on Hydro-Ottawa s approve contractors list and have employees certified to hold Hydro-Ottawa s Station Guarantee for the duration of any shutdown, typically this approval requires the following: d. Each person that will hold a station guarantee has to provide confirmation from their supervisor or manager that they are a 'Qualified' person, typically per OHSA or CSA Z462 requirements. e. The said person(s) must then take the IHSA Utility Work Protection Code, which will give them certification for 3 years..9 The contractor shall submit proof of the above qualifications upon request Shutdown and Field Work Preparation.1 The contractor will arrange and pay for all switching and isolation services required from Hydro-Ottawa as required..2 Access, lay down, staging and traffic control. The City shall advise the contractor on access and traffic control requirements. Contractor shall request areas for lay down and staging as needed..3 The owner will provide electrical isolation and re-instatement procedures in accordance with IHSA and CSA Z462 guidelines to ensure adequate protection and safety for both contractor and the client during the shutdown. These 2
3 2015 July 17 and Testing, ROPEC Page 3 procedures cover switching orders and grounding connections to permit maintenance work on de-energized equipment and to safely return equipment into service. a. The contractor shall coordinate with the owner in preparing the isolation and re- instatement procedures required for the scope of work. These procedures shall be provided to the contractor for review at least 10 business days before the scheduled testing date. b. Execution of the isolation and re-instatement procedures shall be performed by City staff. Particular sequencing of equipment shutdowns and isolations may be required to ensure other portions of the system remain operational. c. The contractor site-supervisor shall observe and give final approval before proceeding with work on de-energized equipment. The contractor shall give final approval before the City re-energizes the equipment..4 Shutdowns and service interruptions must be scheduled around the owner s process requirements and subject to the owner s approval..5 The contractor will submit a Job Plan for the maintenance shutdown. The Job Plan will contain: a. The equipment s identification names, b. The work schedule and the sequence for removal and installation of each major piece of equipment, c. Equipment and crew mobilization and other items as needed. d. The Job Plan will also address site hazards and safe procedures as per EUSA requirements. This plan shall be reviewed by the client at least 5 business days before the scheduled working date..6 The contractor shall request any additional technical information related to the equipment being installed, from the owner as required at least 72 hrs prior to date of testing..7 The Client has the right to reschedule or cancel any of the individual shutdowns as required with 24 hours written notice, without paying additional charges..8 The Client has the right to reschedule or cancel any of the individual shutdowns as required with between 0 and 24 hours of verbal or written notice, with the payment of fair and reasonable mobilization costs. These costs are to be itemized with detailed documentation to be reviewed by the Client Working Constraints.1 There is approximately 6 hours of station de-energization time available per shutdown. Time constraints to complete the full scope are high. The contractor shall coordinate activities and determine the number of shutdowns to complete the scope of work..2 Station shutdown work shall be scheduled for weekends to reduce the impact on plant operations. 3
4 2015 July 17 and Testing, ROPEC Page Individual Day-of Schedules.3 The Contractor shall lead the tailgate meeting to ensure all stakeholders are aware of the risks, roles and responsibilities and health and safety procedures to be followed..4 Be available on site for the duration of shutdown to advise when and how contingency measures should be implemented. Lead implementation of contingency measures, if required..5 Provide supervision to all site personnel covering: a. Substation and other electrical components b. Determine safety and grounding needs c. Schedule/ plan with client and contractors d. Determine single points of contact e. Solidify needs from utility f. Switching procedures (provided by City) g. Site de-energizing. Switching procedure reviewed and in place before outages h. Review all lock-out tag out and grounding locations. Record of all grounds placed.6 Ensure Quality measures are consistently monitored: a. Quality control and quality assurance. b. Verify all test equipment is calibrated and in good working order. c. Verify work scope completed in full. d. Document deficiencies. e. Final Testing Report i. Verify received and all tests completed are reflected in report. ii. Verify report is in specified format. iii. Supply forms and templates as needed Risk Assessment Requirements.1 A risk identification and mitigation plan to minimize operational upsets associated with all parts of the scope of work shall be prepared prior to commencement of field work. 4
5 2015 July 17 and Testing, ROPEC Page 5.2 The Contractor shall provide assistance in preparation of the risk assessment. The contractor shall prepare the work and comply with the mitigation actions identified in the assessment..3 The risk assessment shall identify the following risks and identify mitigating actions for each risk, not limited to the following. a. Mobilization delays b. Installation problems c. Weather issues d. Collision with vehicles and structure e. Discovery of additional equipment damage f. Etc, 1.8. Division of Responsibility.1 The contractor shall supply a suitable and stable source of electrical power to each test site as needed, unless notified by the client in writing that sufficient local power will be available for operating test equipment. All portable alternating current (AC) power sources shall operate at 60 Hz +/- 0.1 Hz..2 The contractor shall supply adequate portable lighting as needed for each test site unless notified by the client in writing that sufficient local lighting will be available for operating test equipment. Ensure adequate lighting is available both with and without normal and/or emergency power..3 The owner, or owner s representative, will supply upon request, an up to date short circuit analysis and coordination study, a protective device setting sheet, a complete set of electrical plans, specifications, and any pertinent change orders to the contractor prior to commencement of field work..4 The owner, or owner s representative, shall notify the contractor of the required testing dates. Work shall be coordinated to expedite project scheduling. Note: various pieces of equipment are required to maintain each building s environmental condition. It is imperative that the communication between each building s operations personnel and the contractor be established prior to the isolation of any equipment. Sufficient time shall be given for the shutdown and startup of equipment such as chillers, pumps, and other essential equipment..5 The contractor shall notify the owner, or owner s representative, prior to commencement of any field work..6 Deviation from the planned schedule of work for each stage of the work must be approved by the owner or owner s representative prior to the isolation of any additional equipment..7 The contractor firm shall be fully responsible for their own safety, including all switching procedures, equipment isolation, and grounding procedures. At the end of each stage of the work, the contractor firm shall ensure that all temporary grounds are removed from the equipment and all equipment is placed into its normal operation position prior to releasing the Station Guarantee. It is the 5
6 2015 July 17 and Testing, ROPEC Page 6 contractor firm s responsibility to record the position of all circuit breakers and switches under the scope of the contract and to ensure that the As found position is maintained after the work is completed Safety Requirements.1 The work listed in these specifications involves hazardous voltages, materials, operations, and equipment. These specifications do not claim to address all of the safety problems associated with their use. It is the responsibility of the contractor to review all applicable regulatory limitations prior to the use of these specifications..2 Safety practices shall include, but are not limited to, the most current following requirements: a. The Occupational Health and Safety Act b. CSA Z462 Workplace Electrical Safety c. Electrical Utility Safety Rules, IHSA d. Workplace Hazardous Materials Information System (WHMIS). Submit to owner, or owner s representative, pertinent MSDS information. e. Applicable Provincial, local, and client safety operating procedures f. National Fire Protection Association NFPA, and the National Fire Code of Canada 1995 g. OSHA 29 CFR Control of Hazardous Energy Sources (Lockout/Tagout).3 All field work shall be performed with apparatus de-energized and grounded except where otherwise specifically required to be ungrounded or energized for certain tests..4 Lock out and tag procedures shall be in effect. All contractor firm representatives shall lock and tag all equipment tested under the scope of work. The testing firm shall provide a lock box for any equipment requiring more that 3 locks. All equipment to be tested under the scope of work shall be isolated from all sources of power, locked and tagged, tested for voltage potential with an approved potential tester rated for the voltage application, and grounded from all sources of power using approved temporary grounds..5 As per CSA Z462, all contractor representatives shall wear the appropriate Personal Protective Equipment (PPE) including approved safety boots, side impact hard hats, fall protection, safety glasses and/or safety shields, arc flash coveralls, and rubber gloves with protectors during switching operations. All PPE shall be rated for the appropriate voltage class application..6 The contractor shall review and supervise all operations with respect to safety, and notify any sub-contractors and/or the client of any known or found hazards or information about the client s installation that needs to be transmitted to subcontractors. 6
7 2015 July 17 and Testing, ROPEC Page 7.7 The contractor shall appoint a designated health and safety representative who shall be responsible the health and safety of personnel within the work area See attached Appendices for additional information. Appendix A Marked-Up Layout Drawings Appendix B Equipment List Appendix C Station Photos Appendix D Single Line Diagram Appendix E Product Data Sheets PART 2 INSPECTION AND TEST PROCEDURES 2.1. Test Equipment.1 All test equipment shall be in good mechanical and electrical condition..2 Metering or monitoring equipment shall be true RMS sensing only. (Peak sensing equipment shall not be permitted)..3 Field test metering used to check power system meter calibration must have an accuracy higher than that of the instrument being checked. Field Test Equipment shall meet the following criteria: a volt DC Insulation Resistance test equipment shall have a meter scale of at least 500 Gig Ohms. b volt DC Insulation Resistance test equipment shall have a meter scale of at least 500 Meg Ohms. c. Low Resistance test equipment shall have a minimum of 5 ampere DC output and the ability to measure down to 5 micro Ohms. d. Accuracy of metering in test equipment shall be appropriate for the test being performed but not in excess of 2% of the scale used. e. Waveshape and frequency of test equipment output waveforms shall be appropriate for the test and tested equipment. Test equipment shall not exceed 2.0 percent Total Harmonic Distortion THD output on voltage waveforms and 2.0 percent THD output on current waveforms..4 Test Instrument Calibration a. The testing firm shall have a calibration program, which assures that all applicable test instruments are maintained within rated accuracy. b. Calibration shall be done by a calibration agency compliant with International Standards Organization ISO and Standard Council of Canada CAN-P-4D. c. Dated calibration labels shall be visible on all test equipment. 7
8 2015 July 17 and Testing, ROPEC Page 8 d. Records must be available and up to date for the owner, or owner s representative, to inspect calibration of each piece of equipment. e. The testing firm shall submit certified calibration certificates of test equipment for approval SUSPENSION INSULATORS Inspection The stock of new suspension insulators are kept in storage on-site. The units will be made available for installation on the scheduled day..1 Before installation, inspect the new insulator for damage or defects. Lightly tap all porcelain insulators to check for sound quality and the presence of internal failures compared to similar insulators..2 After installation, verify acceptable connection, required area clearances and proper alignment..3 Verify tightness of bolted electrical connections for new insulators by calibrated torque-wrench in accordance with manufacture s published data or, if not available, use NETA Table Installation.1 Assemble the new suspension insulators into strings of four (4). There are 120 units to be assembled into 30 strings..2 Remove the existing suspension insulator from the structure and install the new suspension insulator string..3 Re-use the existing strain clamps and connectors where suitable. Replace if there is noticeable damage..4 Re-adjust and bend the phase conductor as needed for proper clearances as needed PIN&CAP/POST INSULATORS Inspection The stock of new post insulators are kept in storage on-site. The units will be made available for installation on the scheduled day..1 Before installation, inspect the new insulator for damage or defects. Lightly tap all porcelain insulators to check for sound quality and the presence of internal failures compared to similar insulators..2 After installation, verify acceptable connection, required area clearances and proper alignment. 8
9 2015 July 17 and Testing, ROPEC Page 9.3 Verify tightness of bolted electrical connections for new insulators by calibrated torque-wrench in accordance with manufacture s published data or, if not available, use NETA Table Installation.1 Remove the existing pin&cap insulator from the structure and install the new post insulator. There are 18 units to be installed..2 Re-use the existing pins and connectors where suitable. Replace if there is noticeable damage..3 Re-adjust and bend the phase conductor as needed for proper clearances as needed SURGE ARRESTORS Inspection The stock of new surge arrestors are kept in storage on-site. The units will be made available for installation on the scheduled day..1 Before installation, inspect the new surge arrestors for damage or defects..2 After installation, verify acceptable connection, required area clearances, grounding and proper alignment..3 Verify tightness of bolted electrical connections for new insulators by calibrated torque-wrench in accordance with manufacture s published data or, if not available, use NETA Table Installation.4 Remove the existing surge arrestor (if applicable) from the structure and install the new surge arrestor..5 The contractor shall construct a platform to mount the new PHLB1 surge arrestor. The platform shall be similar to the adjacent PHLB2 surge arrestor platform. See Appendix A Surge Arrester Mounting Details..6 The contractor shall supply all necessary materials to mount and connect the surge arrestor. Materials to include grounding conductors, ground connectors, clamps, etc Electrical Tests.1 Perform resistance measurements of ground connection with a low resistance ohmmeter..2 Perform an insulation resistance test at voltage levels in NETA Standard Table
10 2015 July 17 and Testing, ROPEC Page FUSES The stock of new fuses are kept in storage on-site. The units will be made available for installation on the scheduled day Inspection and Fuse Replacement.1 Before installation, inspect the new insulator for damage or defects. Inspect fuse link conditions and confirm new fuse matches old fuse..2 Replace the existing fuses with new fuse supplied. Mount the new End Fittings to the new fuses. There are 15 fuse units to install..3 Fuse End Fitting Inspect for cracks and damage, especially where fuse link seats into holder and mechanical integrity..4 Fuse Mounting Verify that each fuse holder has adequate mechanical support..5 Fuse Alignment verify latch on drawout mounts.6 Test and re-torque bolted connections with a calibrated torque-wrench. Bolt torque levels shall be in accordance with NETA Standard Table unless otherwise specified by manufacturer Electrical Tests.1 Measure fuse and fuse holder resistance with a Low Resistance Test Set. (Ensure that Low Resistance test set current output does not exceed rated fuse current.). Investigate fuse resistance values that deviate from each other by more than 15%., fuse links may have crystallized OVERHEAD TOWER ASSEMBLIES Visual and Mechanical Inspections.1 Perform visual inspection of all remaining insulators and clean or replace as required..2 Verify tightness of accessible bolted electrical connections for new insulators by calibrated torque-wrench in accordance with manufacture s published data or, if not available, use NETA Table Visually inspect all sections of conductor bus bar and cables for corrosion and damage. Inspect conductor attachment points for mechanical integrity. Clean as needed..4 Use appropriate overhead lifting devices or manual work methods and protections as required by facility and local authority requirements. 10
11 2015 July 17 and Testing, ROPEC Page Electrical Tests.1 Perform insulation resistance tests on each bus section after the full equipment replacement is complete. Energize each phase with the correct test voltage ensuring the opposing two phases and neutral (4 wire only) are grounded. Each test shall occur for a duration of one (1) minute. Apply test voltage in accordance with NETA Standard Table unless otherwise specified by manufacturer. PART 3 Deliverables 3.1. Job Plan.1 The contractor will submit a Job Plan for each maintenance shutdown. This plan shall be submitted to the client at least 5 business days before the scheduled work date. The client shall approve of the work plan before work can begin..2 The Job Plan shall include the following: 3.2. Maintenance Report a. Details on equipment and crew mobilization. b. Sequence of work to be performed on equipment. c. Estimated timing of work. d. Responsible parties. e. Risk identification and mitigation strategies. f. Hazard identification and safe work procedures as per EUSA rule 107. requirements..1 Maintain a written or typed record of all field tests and inspections, and then assemble and certify a final completely typed assessment report..2 The Assessment Report shall include the following: a. Summary of project, with a description of work completed and not completed, detailed deficiency list, field work difficulties, inspection and test results, analysis, and recommendations. b. Description of all equipment inspected which shall include complete equipment nameplate values and/or installation information. c. Checklist for the day-of field work to record that all substation components were inspected. d. List of deficiencies and order of magnitude cost estimate to repair..3 Electrical Test Sheets shall include the following: a. For each equipment where electrical tests were performed, an electrical test sheets shall be completed and analysed with comments. 11
12 2015 July 17 and Testing, ROPEC Page 12 b. Detailed analysis of the results by comparing measured results with acceptance criteria. Where out of tolerance conditions are observed, the test values are to be highlighted and commented upon. c. Test requiring temperature correction shall be calculated and identified as corrected values in the report. The temperature of the tested equipment shall be measured and noted for this purpose. d. Any other environmental parameters (such as air pressure, humidity) needed for measurement corrections shall also be considered as required. e. Include results from all tests above with starting conditions noted. f. Include any items found out of specified tolerances..4 Provide a draft copy of the report to owner, or owner s representative, within 20 business days of the final date. Allow 10 business days for the City to review and provide comments for revision..5 The owner may require the testing firm to record or transfer the final test results into the owner s custom test sheets. The custom test sheets will be provided to the testing firm no later than 5 business days after the scheduled test date..6 Issue the final complete report, within 10 business days of receiving comments from the draft copy. The full scope of the work is considered incomplete until the final report is received..7 Furnish two (2) paper copies of the complete report to the owner, or owner s representative..8 Furnish.pdf electronic copies, with high resolution printing allowed, of the complete report to the owner, or owner s representative..9 Furnish the native electronic files of the final test results in Microsoft Office formats (ex:.xls,.doc) to the owner, or owner s representative End of Section
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