6-Attachment No. 7 REQ-0007694 Specifications.pdf

REQUEST FOR PROPOSALS

FOR

ELECTRICAL EQUIPMENT PREVENTATIVE MAINTENANCE AND REPAIR

CONTRACT

ATTACHMENT 7

SPECIFICATIONS

(Including Annexes A, B, C and D)

ELECTRICAL EQUIPMENT PREVENTIVE MAINTENANCE AND REPAIR CONTRACT

Section 26 01 26 Electrical Equipment Preventive Maintenance And Repair Specification

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PART 1 GENERAL

1.01 SUMMARY OF WORK

A. Great Lakes Water Authority (GLWA) intends to engage a contractor to perform preventive maintenance, diagnosis, troubleshooting, and repair of electrical power equipment at its various facilities throughout southeastern Michigan.

B. This is an as-needed contract to perform only work authorized in the sole discretion of GLWA. GLWA does not guarantee that the Contractor will be authorized to perform all work itemized herein or shown on the contract proposal form. GLWA reserves the right to assign work to each of the contractors, to self-perform preventive maintenance and repairs, and to engage other contractors to perform electrical maintenance, repairs, and new construction when GLWA deems it to be in its interests to do so.

C. GLWA may authorize the Contractor to perform preventive maintenance and GLWA-authorized repairs for switchgear and other electrical power equipment located at facilities throughout the Great Lakes Water Authority (GLWA) system as listed in Annex A, Tables A.1, A.2, A.3, A.4 and A.5, including equipment at:

1. The GLWA Water Resource Recovery Facility (See Table A.1)

2. Nine Combined Sewer Overflow (CSO) facilities, including six retention treatment basins (RTBs) and three screening and disinfection facilities (SDFs). (See Table A.2)

3. Five Water Treatment Plants (See Table A.3)

4. Seventeen Treated Water Pumping Stations (See Table A.4), and

5. Five Wastewater Pumping Stations (see Table A.5).

D. Note that GLWA does not warrant that the equipment lists provided in Annex A are exhaustive. GLWA reserves the right, in its sole discretion, to assign to the Contractor preventive maintenance, troubleshooting or repairs of other equipment not listed in Annex A, as well as work at other facilities utilized by GLWA. GLWA also reserves the right in its sole discretion to self-perform any preventive maintenance or repairs at any facility, and/or to contract with others to perform any preventive maintenance or repairs, whether or not the equipment involved is listed in Annex A.

E. Addresses of the respective GLWA facilities are listed in Annex A, Tables A1 through A.5.

Annex B provides a plan of the GLWA Water Resource Recovery Facility showing the locations of the Electrical Buildings (EB).

F. Authorized preventive maintenance (PM) tasks will be paid on the basis of the Contract Unit Prices listed in Annex D.

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G. Where required, GLWA may authorize, in its sole discretion, extra work to perform necessary diagnosis, troubleshooting, and repairs beyond the scope of authorized PM. Such extra work shall be proposed, authorized, performed and paid from the allowance for GLWA-authorized Extra Work or from the Contract Unit Price items, in accordance with the provisions of Contract Article 17. Extra work and expenditures from the allowance may only be authorized by a written change directive approved in writing by the GLWA Contracting Officer and/or an Amendment approved in accordance with the Contract provisions. The allowance is for GLWA’s exclusive use and the amount of work authorized from the allowance, if any, shall be at GLWA’s sole discretion.

H. The term of this Contract shall be 36 months from the start-work date identified in the notice to proceed to Substantial Completion and 42 months from the start-work date to Final Completion, with an option at GLWA’s sole discretion for up to two one (1)-year extensions.

I. Contractor shall demonstrate at least five years of satisfactory experience in testing and maintaining electrical power equipment in not less than five contracts with services specifically comparable to this Contract, including preventive maintenance, diagnosis and repairs of medium voltage and 480V electrical equipment including switchgear, transformers, protective relays, load break switches and motor control centers.

J. All electrical testing, maintenance and repairs shall be performed by a technician possessing a NICET Level III electrical power testing certification, or under the supervision of a technician possessing a NICET Level IV electrical power testing certification, or equivalent acceptable to GLWA. Submit qualification records to GLWA not less than one week before each employee begins work under the Contract.

PART 2 SCOPE OF WORK

2.01 Preventive Maintenance

A. Preventive Maintenance procedures applicable to each type of equipment shall include without limitation those shown in Table 1 below.

Table 1 Preventive Maintenance Procedures Required for Each Type of Equipment

Equipment Item

Applicable PM Procedures as

Specified in 2.01.D Medium Voltage Switchgear Vacuum Circuit Breaker PM-1 Medium Voltage Air Circuit Breaker (ACB) PM-2 Medium Voltage Air Circuit Breaker (ACB – 750MVA) PM-2A Medium Voltage Starter - Air Contactor/ Motor Controller PM-3 Medium Voltage Starter - Vacuum Contactor PM-4

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Table 1 Preventive Maintenance Procedures Required for Each Type of Equipment

Equipment Item

Applicable PM Procedures as

Specified in 2.01.D Medium Voltage Soft Starter PM-5 Medium Voltage Variable Frequency Drive (VFD) or Field Control Cubicle

PM-6

Medium Voltage Switchgear Metering Cubicles PM-7 Medium Voltage Switchgear PLC or Relay Cubicle PM-7 480V Switchgear PLC or Relay Cubicle PM-7 Operator Interface PM-7 Protective Relay PM-8 High Voltage and Medium Voltage Load Break Switch/ Primary Air Switch/ Fused Disconnect/Circuit Switcher

PM-9

Bolt-In Medium Voltage Load Break Switch WTP PM-9A Transformer - Dry Type PM-10 Transformer Oil Test PM-11 Transformer - Liquid Filled PM-12 Transformer – On Load Tap Changer WTP PM-12A Neutral Grounding Resistor PM-13 480 V and Medium Voltage Substation Lineup PM-14 480 V Switchgear Air Circuit Breaker PM-15 480V Switchgear Main Lugs, Instruments, Metering or Controls Cubicle

PM-15

480 V. Switchboard PM-16 480V Main Load Break Switch PM-16 480V Panelboard Switch PM-16 Motor Control Center (MCC) Compartment Inspection - incl.

starter, feeder circuit breaker, space, surge protective device (SPD), solid state reduced voltage (SSRV) starter, soft starter, variable frequency drive (VFD), or main lugs

PM-17

Motor Control Center (MCC) Compartment Testing- incl.

combination starter, feeder circuit breaker, space, surge protective device (SPD), solid state reduced voltage (SSRV) starter, soft starter, variable frequency drive (VFD), or main lugs

PM-17A

Power Factor Correction Capacitor PM-18 Bus Duct (480V or Medium Voltage) PM-19 Large Motor PM-20

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Table 1 Preventive Maintenance Procedures Required for Each Type of Equipment

Equipment Item

Applicable PM Procedures as

Specified in 2.01.D Load Bank Battery Testing PM-21 Periodic Inspection - All Electrical Equipment at CSO Facility (Per Facility)

PM-22

Infrared (IR) Testing and Associated Service of equipment including Circuit Switcher, Transformer - Dry Type, Transformer

- Liquid Filled, Neutral Resistor, 480 V Switchgear, 480 V Switchgear ACB, 480 V. Switchboard, 480V Main Load Break Switch, 480V Panelboard Switch, Motor Control Center, MCC Compartments/Buckets (including starters, breakers, switches, VFD’s and other items), and Medium Voltage Switches and Switchgear having infrared viewing windows. (Per Day)

PM-23

B. Preventive Maintenance Intervals

1. Periodic inspections in accordance with PM Procedure PM-22 will be required only at Combined Sewer Overflow facilities listed in Annex A, and are initially targeted to be conducted at three month intervals.

2. Infrared testing and associated services under PM Procedure PM-23 are initially targeted to be conducted annually at all facilities for all equipment listed in Annex A.

3. Transformer Oil Tests under PM Procedure PM-11 are initially targeted at six month intervals for WRRF transformers A, B and C, and at one year intervals for all other liquid-filled transformers.

4. All other PM procedures for the equipment listed in Annex A are initially targeted to be conducted at two year intervals at WRRF electrical buildings EB-3 and EB-4, at three year intervals elsewhere at the WRRF, and at two year intervals at all other facilities,

5. GLWA reserves the right to revise any or all PM intervals in its sole discretion.

C. Test equipment shall be calibrated using standards traceable to NIST within one year before use. Submit calibration records to GLWA prior to using each piece of test equipment.

D. Upon the direction of GLWA, Contractor shall perform PM procedures on a Contract Unit Price basis for electrical equipment, including without limitation the equipment listed in Annex A. For each item of equipment GLWA may direct the Contractor to perform one or more of the preventive maintenance procedures listed in paragraphs 1 through 23 below.

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For each PM procedure, the unit price quantity shall be as described below. The unit price shall be payable each time the PM procedure is completed at the direction of GLWA.

1. PM-1 Medium Voltage Vacuum Circuit Breakers and Cells (Per Breaker)

.a. Visually check the cubicle for corrosion, damage, deterioration or signs of heating.

.b. Vacuum cell cabinet to clean any dust build up in the cell.

.c. Check auxiliary control devices, including molded case breakers, knife switches, fuse holders, fuses, contactors, and instrument and control switch contacts.

.d. Physically check all wiring (including ground connections) for tightness

.e. Torque accessible bus and connection bolts to the proper values.

.f. Inspect, clean, and lubricate the racking in and out mechanism lubrication points with Mobil 28 grease.

.g. Inspect cell racking out mechanism.

.h. Check cell interlocks for proper operation.

.i. Check the shutter for proper operation.

.j. Lubricate the shutter mechanism lubrication points with Mobil 28 grease.

.k. Perform switchboard functional test to assure proper operation of controls and equipment.

.l. Clean and lubricate cell and breaker

.m. Perform insulation resistance test (before and after testing)

.n. Contact resistance test (before and after testing)

.o. Clean the breaker using a shop vac and clean rags.

.p. Inspect the breaker for any damage, corrosion or arcing

.q. lubricate the manufacturer’s accessible lubrication points with Mobil 28 grease

.r. Hi-pot test the vacuum bottles per the manufacturer’s recommendations

.s. With breaker closed, test the insulation to ground of each breaker pole using a 2500VDC megger after the breaker has been cleaned.

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.t. Measure and record the wear of the vacuum contact. Record the minimum wear per the manufacturer.

.u. Check the control wiring for any damage.

.v. Check the control terminals located on the breaker for tightness.

.w. Check the auxiliary contacts for burning. Clean contacts as needed lightly using a scotch brite pad. Caution: when cleaning auxiliary contacts, lightly clean with a scotch brite pad so not to remove silver or tinned coating.

.x. Operate the breaker using the test cabinet to verify proper open and close operation.

.y. Verify that the breaker spring charging motor automatically charges the motor after a close operation.

.z. Verify that the spring discharge mechanism/interlock operation operates properly.

.aa. Clean the breaker primary disconnects and apply a thin coating of Mobil 28 to the contacts.

2. PM-2 Medium Voltage Air Circuit Breakers and Cells (Per Breaker)

.a. Visually check the cubicle for corrosion, damage, deterioration or signs of heating.

.b. Vacuum cell cabinet to clean any dust build up in the cell.

.c. Check auxiliary control devices, including molded case breakers, knife switches, fuse holders, fuses, contactors, and instrument and control switch contacts.

.d. Physically check all wiring (including ground connections) for tightness

.e. Torque accessible bus and connection bolts to the proper values.

.f. Inspect, clean, and lubricate the racking in and out mechanism lubrication points with Mobil 28 grease.

.g. Inspect cell racking out mechanism.

.h. Check cell interlocks for proper operation.

.i. Check the shutter for proper operation.

.j. Lubricate the shutter mechanism lubrication points with Mobil 28 grease.

.k. Perform switchboard functional test to assure proper operation of controls and equipment.

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.l. Inspect breaker assembly (including primary bushings and finger clusters) for deterioration, breakage, or excessive wear and cracks in frame and castings.

.m. Vacuum and clean breaker assembly.

.n. Remove arc chutes as necessary. Arc chutes which are not made of asbestos will be blown out and inspected for signs of heating, cracks, and broken or missing parts.

.o. Inspect main and arcing contacts and other current carrying parts for wear and signs of overheating. Check for wipe, closing sequence, open gap, alignment, and resistance. Take mechanical measurements and make any necessary adjustments.

.p. Lubricate contacts and finger clusters according to manufacturer’s recommendations.

.q. Check operating mechanism for proper operation and tolerances. Take mechanical measurements and make any necessary adjustments

.r. Check auxiliary switches for sequence and contact alignment. Check control wiring for satisfactory condition and tight connections.

.s. Check spring charging motor and mechanisms (if present) for component wear and proper limit operation.

.t. Test control wiring insulation. (Omit if solid state devices are present)

.u. Check breaker insulation resistance with a 1000 volt DC or Higher Megohmmeter, including: phase-to-phase with breaker closed; phase-to-ground with breaker closed; and across contacts with breaker open after the breaker has been cleaned.

.v. Operate breaker electrically using the manufacturers test stand and / or mechanically several times to assure smooth operation.

.w. Check contact resistance with a low resistance ohmmeter after the contacts have been cleaned.

.x. Check low control voltage close and Trip operation.

.y. Note: Unit Price Item #6-2A is applicable only to 750 MVA circuit breakers at Lake Huron Water Treatment Plant. Unit Price Item #6-2 is applicable for all other Water Treatment Plant medium voltage air circuit breakers.

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3. PM-2A Medium Voltage Air Circuit Breakers and Cells (Per Breaker)

.a. Visually check the cubicle for corrosion, damage, deterioration or signs of heating.

.b. Vacuum cell cabinet to clean any dust build up in the cell.

.c. Check auxiliary control devices, including molded case breakers, knife switches, fuse holders, fuses, contactors, and instrument and control switch contacts.

.d. Physically check all wiring (including ground connections) for tightness

.e. Torque accessible bus and connection bolts to the proper values.

.f. Inspect, clean, and lubricate the racking in and out mechanism lubrication points with Mobil 28 grease.

.g. Inspect cell racking out mechanism.

.h. Check cell interlocks for proper operation.

.i. Check the shutter for proper operation.

.j. Lubricate the shutter mechanism lubrication points with Mobil 28 grease.

.k. Perform switchboard functional test to assure proper operation of controls and equipment.

.l. Inspect breaker assembly (including primary bushings and finger clusters) for deterioration, breakage, or excessive wear and cracks in frame and castings.

.m. Vacuum and clean breaker assembly.

.n. Remove arc chutes. Arc chutes which are not made of asbestos will be blown out and inspected for signs of heating, cracks, and broken or missing parts.

.o. Inspect main and arcing contacts and other current carrying parts for wear and signs of overheating. Check for wipe, closing sequence, open gap, alignment, and resistance. Take mechanical measurements and make any necessary adjustments.

.p. Lubricate contacts and finger clusters according to manufacturer’s recommendations.

.q. Check operating mechanism for proper operation and tolerances. Take mechanical measurements and make any necessary adjustments

.r. Check auxiliary switches for sequence and contact alignment. Check control wiring for satisfactory condition and tight connections.

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.s. Check spring charging motor and mechanisms (if present) for component wear and proper limit operation.

.t. Test control wiring insulation. (Omit if solid state devices are present)

.u. Check breaker insulation resistance with a 1000 volt DC or Higher Megohmmeter, including: phase-to-phase with breaker closed; phase-to-ground with breaker closed; and across contacts with breaker open after the breaker has been cleaned.

.v. Operate breaker electrically using the manufacturers test stand and / or mechanically several times to assure smooth operation.

.w. Check contact resistance with a low resistance ohmmeter after the contacts have been cleaned.

.x. Check low control voltage close and Trip operation.

.y. Note: Unit Price Item #6-2A is applicable only to 750 MVA circuit breakers at Lake Huron Water Treatment Plant.

4. PM-3 Medium Voltage Motor Starters/Air Contactors/Motor Controller (Per Starter)

.a. Inspect isolation switches and contactor assemblies (including connecting stabs and finger contacts) for deterioration, breakage, or excessive wear and cracks in frame and castings.

.b. Vacuum and clean switch and contactor assemblies.

.c. Remove arc chutes as necessary. Arc chutes which are not made of asbestos will be blown out and inspected for signs of heating, cracks, and broken or missing parts.

.d. Inspect contacts and other current carrying parts for wear and signs of overheating.

Check for wipe, closing sequence, open gap, alignment, and resistance. Take mechanical measurements and make any necessary adjustments.

.e. Lubricate contacts and finger clusters according to manufacturer’s recommendations.

.f. Check operating mechanism for proper operation, tolerances, component wear and proper limit operation. Take mechanical measurements and make any necessary adjustments.

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.g. Check auxiliary switches for sequence and contact alignment. Check control wiring for satisfactory condition and tight connections.

.h. Lubricate main switchblades and contacts using Mobil 28 grease. Caution: Do not lubricate arcing contacts.

.i. Adjust switch operating mechanism and linkage for adequate and proper operation.

.j. Check each fuse holder for adequate mechanical support for each fuse and check for any signs of overheating. Check each fuse assembly for discrepancies in rating and size (if applicable).

.k. Check switch assembly, bus, cable terminals, fuses, fuse clips, etc. for signs of cracked insulation, tracking, corona discharge, overheating, mechanical stress, etc.

.l. Inspect insulation assemblies for evidence of physical damage or contamination.

.m. Verify that the equipment is properly grounded.

.n. Inspect all indicating devices for proper operation.

.o. Check finger clusters, disconnect studs, and draw out mechanism for proper alignment and operation (if applicable). Lubricate according to manufacturer’s recommendations.

.p. Perform switch open and close operation test.

.q. Utilizing a 10A ductor, perform contact resistance test across each switch blade and fuse holder, and across closed contactor contacts after the contacts are cleaned.

.r. Test all electrical and mechanical interlock systems for proper operation and sequencing of switch/fuse door and other interlocks. Lubricate according to manufacturer’s recommendations.

.s. Perform primary fuse resistance tests.

.t. Utilizing a 2500 VDC megger, perform insulation resistance tests on each pole, phase-to-phase and phase-to-ground for one (1) minute with switch and contactor contacts closed. Perform insulation resistance test across open switch contacts and contactor contacts for each pole after the contactor has been cleaned.

.u. Test control wiring insulation. (Omit if solid state devices are present)

.v. Operate each contactor electrically using the manufacturers test cabinet whenever available or mechanically several times to assure smooth operation.

.w. Check low control voltage close and open operation.

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5. PM-4 Medium Voltage Motor Starters/Vacuum Contactors (Per Starter)

.a. Inspect isolation switches and contactor assemblies (including connecting stabs and finger contacts) for deterioration, breakage, or excessive wear and cracks in frame and castings.

.b. Vacuum and clean switch and contactor assemblies.

.c. Hi-pot test the vacuum bottles per the manufacturer’s recommendations

.d. Measure and record the wear of the vacuum contact. Record the minimum wear per the manufacturer.

.e. Inspect current carrying parts for wear and signs of overheating.

.f. Lubricate finger clusters according to manufacturer’s recommendations.

.g. Check operating mechanism for proper operation, tolerances, component wear and proper limit operation.

.h. Check auxiliary switches for sequence and contact alignment. Check control wiring for satisfactory condition and tight connections.

.i. Lubricate main switchblades and contacts using Mobil 28 grease. Caution: Do not lubricate arcing contacts.

.j. Adjust switch operating mechanism and linkage for adequate and proper operation.

.k. Check each fuse holder for adequate mechanical support for each fuse and check for any signs of overheating. Check each fuse assembly for discrepancies in rating and size (if applicable).

.l. Check switch assembly, bus, cable terminals, fuses, fuse clips, etc. for signs of cracked insulation, tracking, corona discharge, overheating, mechanical stress, etc.

.m. Inspect insulation assemblies for evidence of physical damage or contamination.

.n. Verify that the equipment is properly grounded.

.o. Inspect all indicating devices for proper operation.

.p. Check finger clusters, disconnect studs, and draw out mechanism for proper alignment and operation (if applicable). Lubricate according to manufacturer’s recommendations.

.q. Perform switch open and close operation test.

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.r. Utilizing a 10A ductor, perform contact resistance test across each switch blade and fuse holder, and across closed contactor contacts after the contacts have been cleaned.

.s. Test all electrical and mechanical interlock systems for proper operation and sequencing of switch/fuse door and other interlocks. Lubricate according to manufacturer’s recommendations.

.t. Perform primary fuse resistance tests.

.u. Utilizing a 2500 VDC megger, perform insulation resistance tests on each pole, phase-to-phase and phase-to-ground for one (1) minute with switch and contactor contacts closed. Perform insulation resistance test across open switch contacts and contactor contacts for each pole after the contactor has been cleaned.

.v. Test control wiring insulation. (Omit if solid state devices are present)

.w. Operate each contactor electrically using the manufacturers test cabinet whenever available or mechanically several times to assure smooth operation.

.x. Check low control voltage close and open operation.

6. PM-5 Medium Voltage Motor Soft Starters (Per Starter)

.a. Inspect isolation switch, main contactor, and bypass contactor assemblies (including connecting stabs and finger contacts) for deterioration, breakage, or excessive wear and cracks in frame and castings.

.b. Vacuum and clean switch and contactor assemblies.

.c. Perform vacuum cleaning of power cells, other solid state components, and heat sinks. Inspect visually for signs of excessive heating, dust accumulation, discoloration, corrosion, or leaking capacitors. Confirm proper operation of fans and cooling systems. Clean or replace any air vent filters using owner stock when available. Costs for replacement of filters and door seals, if required, will be addressed under the Contract provisions for extra work.

.d. Measure and record the wear of the vacuum contacts if present. Record the minimum wear per the manufacturer.

.e. Inspect current carrying parts for wear and signs of overheating.

.f. Lubricate finger clusters according to manufacturer’s recommendations.

.g. Vacuum bottle interrupters will undergo a Hi-pot integrity test per the manufacturer’s recommendations.

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.h. Check operating mechanisms for proper operation, tolerances, component wear and proper limit operation.

.i. Check auxiliary switches for sequence and contact alignment. Check control wiring for satisfactory condition and tight connections.

.j. Lubricate main switchblades and contacts using Mobil 28 grease. Caution: Do not lubricate arcing contacts.

.k. Adjust switch operating mechanism and linkage for adequate and proper operation.

.l. Check each fuse holder for adequate mechanical support for each fuse and check for any signs of overheating. Check each fuse assembly for discrepancies in rating and size (if applicable).

.m. Check switch assembly, main and bypass contactor assemblies, bus, cable terminals, fuses, fuse clips, etc. for signs of cracked insulation, tracking, corona discharge, overheating, mechanical stress, etc.

.n. Inspect insulation assemblies for evidence of physical damage or contamination.

.o. Verify that the equipment is properly grounded.

.p. Inspect all indicating devices for proper operation.

.q. Check finger clusters, disconnect studs, and draw out mechanism for proper alignment and operation (if applicable). Lubricate according to manufacturer’s recommendations.

.r. Perform switch open and close operation test.

.s. Utilizing a 10A ductor, perform contact resistance test across each switch blade and fuse holder, and across each set of closed contactor contacts.

.t. Test all electrical and mechanical interlock systems for proper operation and sequencing of switch/fuse door and other interlocks. Lubricate according to manufacturer’s recommendations.

.u. Perform primary fuse resistance tests.

.v. Isolation switch, main contactor and bypass contactor insulation (megger tests) resistance tests will be performed using a 2500VDC or higher rated megger on each pole. These tests will be from Phase to Phase with the switch and contactor closed, from Phase to Frame with the switch and contactor closed and across the contacts with the switch and contactor open. These tests will be performed after the insulating members are cleaned and after all other electrical tests are completed. Test duration will be one (1) minute.

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.w. Operate each contactor electrically using the manufacturers test cabinet whenever available or mechanically several times to assure smooth operation.

.x. Check low control voltage close and open operation.

7. PM-6 Variable Frequency Drives, Field Control Cubicles and Brushless Monitoring Systems (Per VFD or Controller)

.a. Inspect isolation switches, main contactor, and bypass starter contactor assemblies (including connecting stabs and finger contacts) for deterioration, breakage, or excessive wear and cracks in frame and castings.

.b. Vacuum and clean switch and contactor assemblies.

.c. Inspect for condition of paint, panels, filters, doors, door handles, lamps / lens, instrument / relay covers, space heaters, and control / potential transformers.

.d. Check auxiliary control devices, including molded case breakers, knife switches, fuse holders, fuses, contactors, and instrument and control switch contacts.

.e. Perform vacuum cleaning of power cells, control units, other solid state components, transformers, and heat sinks. Inspect visually for signs of excessive heating, dust accumulation, discoloration, corrosion, or leaking capacitors.

Confirm proper operation of fans and cooling systems. Clean or replace any air vent filters using owner supplied stock when available Costs for replacement of filters and door seals, if required, will be addressed under the Contract provisions for extra work.

.f. Measure and record the wear of the vacuum contacts if present. Record the minimum wear per the manufacturer.

.g. Inspect current carrying parts for wear and signs of overheating.

.h. Lubricate finger clusters according to manufacturer’s recommendations.

.i. Vacuum bottle interrupters will undergo a Hi-pot integrity test per the manufacturer’s recommendations.

.j. Check operating mechanisms for proper operation, tolerances, component wear and proper limit operation.

.k. Check auxiliary switches for sequence and contact alignment. Check control wiring for satisfactory condition and tight connections.

.l. Lubricate main switchblades and contacts using Mobil 28 grease. Caution: Do not lubricate arcing contacts.

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.m. Adjust switch operating mechanism and linkage for adequate and proper operation.

.n. Check each fuse holder for adequate mechanical support for each fuse and check for any signs of overheating. Check each fuse assembly for discrepancies in rating and size (if applicable).

.o. Check switch assembly, main and bypass contactor assemblies, bus, cable terminals, fuses, fuse clips, etc. for signs of cracked insulation, tracking, corona discharge, overheating, mechanical stress, etc.

.p. Inspect insulation assemblies for evidence of physical damage or contamination.

.q. Verify that the equipment is properly grounded.

.r. Inspect all indicating devices for proper operation.

.s. Check finger clusters, disconnect studs, and draw out mechanism for proper alignment and operation (if applicable). Lubricate according to manufacturer’s recommendations.

.t. Perform switch open and close operation test.

.u. Utilizing a 10A ductor, perform contact resistance test across each switch blade and fuse holder, and across each set of closed contactor contacts after the contacts are cleaned.

.v. Test all electrical and mechanical interlock systems for proper operation and sequencing of switch/fuse door and other interlocks. Lubricate according to manufacturer’s recommendations.

.w. Perform primary fuse resistance tests.

.x. The main switch, main contactor and bypass contactor insulation (megger tests) resistance tests will be performed using a 2500VDC or higher rated megger on each pole. These tests will be from Phase to Phase and Phase to Frame with the switch and contactor closed and across the contacts with the switch and contactor open. These tests will be performed after the insulating members are cleaned and after all other electrical tests are completed. Test duration will be one (1) minute.

.y. Operate each contactor electrically using the manufacturers test cabinet whenever available or mechanically several times to assure smooth operation.

.z. Check low control voltage close and open operation.

.aa. Confirm proper operation in manual and automatic control modes.

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8. PM-7 PLC Type and Relay Type Auto/Manual Breaker Throwover System, Operator Interface or Metering Cubicle (Per Cubicle)

.a. Inspect for condition of paint, panels, filters, doors, door handles, lamps / lens, instrument / relay covers, space heaters, and control / potential transformers.

.b. Check auxiliary control devices, including molded case breakers, knife switches, fuse holders, fuses, contactors, relays, and instrument and control switch contacts.

.c. Inspect and test PLC and relays for proper operation. Test PLC and relays only when approved by GLWA, since breakers can be opened disrupting power to process equipment.

.d. Inspect and test UPS (if applicable)

.e. Perform vacuum cleaning of PLCs and other solid state components, transformers, and heat sinks. Inspect visually for signs of excessive heating, dust accumulation, discoloration, corrosion, or leaking capacitors. Confirm proper operation of fans and cooling systems. Clean or replace any air vent filters using owner stock when available. Costs for replacement of filters, if required, will be addressed under the Contract provisions for extra work. Clean display screens in accordance with manufacturer recommendation. Confirm proper operation of keypads and other human interface devices.

.f. Verify that the equipment is properly grounded.

.g. Inspect all indicating devices for proper operation.

9. PM-8 Switchgear Protective Relay (Per Relay)

.a. Perform the recommended tests per the manufacturer’s O&M Manual. In general, these tests include:

.b. Clean top of case cover prior to removal.

.c. Inspect and clean relay cover. Inspect relay case and clean the interior, if de-energized.

.d. Inspect relay for dust, iron filings, rust, or foreign matter.

.e. Inspect relay contacts for freedom of movement.

.f. Check relay mounting hardware, wiring connections, and tap screws for tightness.

.g. Check insulation resistance to ground (relay frame). (Omit for solid state devices)

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.h. Test relay for pickup, time delay, instantaneous trip, and target / seal-in (for induction disc and instantaneous elements).

.i. Test relay for restraint, directional and other elements as required.

.j. If the electro-mechanical relay is out of calibration to the point where it prevents proper protection of the equipment, adjust accordingly to conform to manufacturer’s operation curves.

.k. Report on the test forms the as-found test results and as-left test results after calibrations or repairs were performed to conform to manufacturer’s specifications.

.l. Clean display screens in accordance with manufacturer recommendation. Confirm proper operation of keypads and other human interface devices.

.m. Inspect digital device readouts for error codes, indication of operation, and to confirm that readout values are within expected ranges.

.n. Associated circuit breaker shall be open and racked out during protective relay preventive maintenance activities.

.o. During the preventive maintenance, the Contractor shall confirm that relay settings match the settings recommended in the corresponding coordination study if GLWA provides the study. If directed in writing by GLWA, the Contractor shall set relays as recommended in the study provided that the relay is capable of that setting. Unless directed otherwise by GLWA in writing the Contractor will leave relays set to their as-found settings.

10. PM-9 Medium Voltage and High Voltage Load Break Switch/Fused Disconnect (Per Disconnect):

.a. Examine bus bars for discoloration and oxidation.

.b. Check for moisture, water leaks and hardware for rust.

.c. Check the paint condition.

.d. Thoroughly clean air switch. Note condition of ventilation louvers and air filters (if applicable).

.e. Clean or replace air filter if needed using owner stock when available. Costs for replacement of filters, if required, will be addressed under the Contract provisions for extra work.

.f. Examine and torque all bus and cable connections.

Great Lakes Water Authority Page 19 of 49 December 2 , 2025

.g. Lubricate main switchblades and contacts using Mobil 28 grease. Caution: Do not lubricate arcing contacts.

.h. Inspect and clean arcing contacts. Do not lubricate.

.i. Check arc chutes or interrupter devices for condition, alignment and proper operation.

.j. Adjust switch operating mechanism and linkage for adequate and proper operation.

.k. Clean and inspect cable terminations and connections. Check for tracking.

.l. Check each fuse holder for adequate mechanical support for each fuse and check for any signs of overheating. Check each fuse assembly for discrepancies in rating and size (if applicable).

.m. Check switch assembly, bus, cable terminals, fuses, fuse clips, etc. for signs of cracked insulation, tracking, corona discharge, overheating, mechanical stress, etc.

.n. Inspect insulation assemblies for evidence of physical damage or contamination.

.o. Verify that the equipment is properly grounded.

.p. Visually inspect and clean arrester (if present)

.q. Verify proper operation of space heaters using a clamp-on ammeter or existing ammeter (if applicable). If heater cannot be energized during testing perform continuity testing to verify operability.

.r. Examine and tighten control and instrumentation connections.

.s. Inspect all indicating devices for proper operation.

.t. Check finger clusters, disconnect studs, and draw out mechanism for proper alignment and operation (if applicable). Lubricate according to manufacturer`s recommendations.

.u. Check for tightness of the electrical connections of cables removed during the inspection process by calibrated torque wrench before final energization.

.v. Perform open and close operation test.

.w. Utilizing a 2500 VDC megger, perform insulation resistance tests on each pole, phase-to-phase and phase-to-ground for one (1) minute. Perform insulation resistance test across open contacts for each pole.

Great Lakes Water Authority Page 20 of 49 December 2 , 2025

.x. Utilizing a 10A ductor, perform contact resistance test across each switch blade and fuse holder.

.y. Test all electrical and mechanical interlock systems for proper operation and sequencing of switch/fuse door and other interlocks. Lubricate according to manufacturer’s recommendations.

.z. Perform primary fuse resistance tests.

.aa. As necessary for isolation to allow preventive maintenance, the Contractor shall:

(a) work with GLWA and DTE to identify and schedule the shutdown of the DTE service lines when required; (b) comply with all DTE requirements including signing on and off of DTE protection, (c) operate GLWA-owned pole mounted disconnects (when allowed by DTE) and (d) install and remove required temporary grounding clusters.

.bb. Note: Unit Price Item #6-9A applies only to bolt-in Medium Voltage and High Voltage Load Break Switches located at the Water Works Park Water Treatment Plant Low Lift. Unit Price Item #6-9 applies to all other in Medium Voltage and High Voltage Load Break Switches/Fused Disconnects located at Water Treatment Plants.

11. PM-9A Medium Voltage and High Voltage Load Break Switch/Fused Disconnect (Per Disconnect):

.a. Coordinate complete shutdown of switchgear bus with GLWA prior to inspection process.

.b. Check the paint condition.

.c. Thoroughly clean air switch.

.d. Examine and torque all bus and cable connections.

.e. Lubricate main switchblades and contacts using Mobil 28 grease. Caution: Do not lubricate arcing contacts.

.f. Inspect and clean arcing contacts. Do not lubricate.

.g. Check arc chutes or interrupter devices for condition, alignment and proper operation.

.h. Adjust switch operating mechanism and linkage for adequate and proper operation.

.i. Clean and inspect cable terminations and connections. Check for tracking.

Great Lakes Water Authority Page 21 of 49 December 2 , 2025

.j. Check each fuse holder for adequate mechanical support for each fuse and check for any signs of overheating. Check each fuse assembly for discrepancies in rating and size (if applicable).

.k. Check switch assembly, bus, cable terminals, fuses, fuse clips, etc. for signs of cracked insulation, tracking, corona discharge, overheating, mechanical stress, etc.

.l. Inspect insulation assemblies for evidence of physical damage or contamination.

.m. Verify that the equipment is properly grounded.

.n. Visually inspect and clean arrester (if present)

.o. Verify proper operation of space heaters using a clamp-on ammeter or existing ammeter (if applicable). If heater cannot be energized during testing perform continuity testing to verify operability.

.p. Inspect all indicating devices for proper operation.

.q. Check finger clusters, disconnect studs, and draw out mechanism for proper alignment and operation (if applicable). Lubricate according to manufacturer`s recommendations.

.r. Check for tightness of the electrical connections of cables removed during the inspection process by calibrated torque wrench before final energization.

12. PM-10 Dry type Transformers (Per Transformer)

.a. Check for physical damage, cracked insulators, and defective wiring.

.b. Check electrical connections for overheating and discoloration.

.c. Thoroughly clean transformer ventilating channels between core and windings and between windings. Clean transformer compartments and enclosure.

.d. Perform visual and mechanical inspections on bushings, insulators and arresters.

Wipe clean with electrical cleaning solvent (if necessary)

.e. Check tightness of accessible bolted electrical connections removed during the inspection process.

.f. Inspect transformer for loose bracing, loose iron, and adequate ventilation clearances.

Great Lakes Water Authority Page 22 of 49 December 2 , 2025

.g. Inspect transformer wedges and clamping rings for proper clamping of windings.

Tighten as required.

.h. Inspect windings for evidence of problems due to corona leakage, tracking, overheating, clogged airways, and damaged insulation.

.i. Inspect the core assembly for loose and/or dislocated laminations, localized or general overheating.

.j. Verify that the inter-phase barriers are in the proper location.

.k. Check and verify all ground connections.

.l. Check for tightness of electrical connections removed during the inspection process by calibrated torque wrench before final energization.

.m. Check lightning arrestors, fuses, cutouts, etc.

.n. Check for proper operation of auxiliary devices such as cooling fans and fan control, temperature detectors and indicators.

.o. Perform insulation resistance tests, winding-to-winding and winding–to-ground, utilizing a 2500 VDC megger.

.p. Calculate dielectric absorption ratio and polarization index.

.q. Primary and secondary winding resistance test on the in use tap positon.

13. PM-11 Liquid Filled Transformers Oil Tests (per Transformer)

.a. Inspect and record oil level.

.b. Inspect nitrogen pressure gage for adequate nitrogen pressure and record pressure.

.c. Check for any oil leaks and record them on the report.

.d. Check the paint condition.

.e. Sample dielectric fluid from tank. Analyze each sample to insure adequate insulation and chemical properties, as indicated. The oil shall be tested for the following:

i Dielectric Strength ASTM D877 or D1816 ii Neutralization Number ASTM D664 or D974 iii Color ASTM D1500

Great Lakes Water Authority Page 23 of 49 December 2 , 2025 iv Interfacial Tension ASTM D971 v Power Factor ASTM D924 vi Specific Gravity ASTM D1298 vii Moisture Content ASTM D1533 viii Gas-In-Oil (Dissolved Gas) Analysis ASTM D3612

.f. At initial preventive maintenance inspection only, test dielectric fluid for PCB Contamination (ASTM D4059) provided there is no sticker on the tank stating that the fluid has been determined to be PCB free. Testing will be performed under unit price PM-11.

.g. Unit Prices for PM-11 include disposal of dielectric fluid samples provided they do not include PCB’s.

.h. Note: Where requested by GLWA, in lieu of utilizing unit prices, oil testing may be performed under a subcontract and paid from the allowance.

14. PM-12 Liquid Filled Transformers (per Transformer)

.a. In order to comply with EPA regulations, GLWA may provide certified laboratory test results to show that the oil is less than 50 ppm PCB. If laboratory results are not available, a sample shall be tested by contractor before any internal work can be performed. Testing will be performed under unit price PM-11.

.b. Check electrical connections for overheating and discoloration.

.c. Check for physical damage, cracked insulators, and defective wiring.

.d. Perform visual and mechanical inspections and electrical tests on bushings, insulators and arresters. Wipe clean with electrical cleaning solvent (if necessary).

If power factor or capacitance tap is present perform electrical power factor test.

Check and record point to point resistance of arrester grounding. Perform insulation-resistance tests on each arrester, phase terminal-to-ground.

.e. Inspect bushings where accessible for chipped or cracked porcelain and oil leakage (if applicable). Check for any oil leaks and record them on the report.

.f. Inspect pressure relief device.

.g. Note gas pressure as positive vacuum or zero.

.h. Check and inspect load tap changer visually to identify any defects. Clean and inspect mechanical parts. Measure and record resistance of transition resistors, Great Lakes Water Authority Page 24 of 49 December 2 , 2025 contact wear (if accessible), and insulation distances (if accessible). Inspect motor drive, drive shaft, protective relays, heaters and other components recommended by the manufacturer. Perform functional test. (Note: Unit Price Item #6-12A is applicable to the costs of work within this item 2.01.D.12.h only at Water Treatment Plant liquid-filled transformers. For all other transformers costs for on-load tap changer preventive maintenance is included within the PM-12 unit price for preventive maintenance of the associated transformer.) Note: PM-12 does not apply to WRRF transformers A and B.

.i. Check external bolted electrical connections and ground connections for tightness.

.j. Check ground resistor, if applicable

.k. Thoroughly clean transformer and transformer compartments.

.l. Check and record insulation fluid level in tanks, compartments, and bushings.

.m. Inspect gasket items, cooling assemblies, and terminal and tap chambers for signs of leakage.

.n. Inspect high voltage switch and terminal chamber.

.o. Check lightning arrestors, fuses, cutouts, etc.

.p. Check auxiliary devices such as cooling fans, sudden pressure relays, positive gas pressure systems, indicating devices, etc., for proper operation.

.q. Check for tightness of electrical connections, where accessible, by calibrated torque wrench before final energization.

.r. Perform insulation resistance tests, winding-to-winding and winding–to-ground, utilizing a 2500VDC megger on medium voltage side and 480V on low voltage side on the in-use tap only.

.s. Calculate dielectric absorption ratio and polarization index.

.t. Primary and secondary winding resistance test, including the in-use tap on transformers equipped with non-load tap changers, the primary in use tap and all secondary tap positions on transformers equipped with on-load tap changers.

.u. Perform tests to verify the correct operation of cooling fans.

.v. As necessary for isolation to allow preventive maintenance, the Contractor shall:

(a) work with GLWA and DTE to identify and schedule the shutdown of the DTE service lines when required; (b) comply with all DTE requirements including signing on and off of DTE protection, (c) operate GLWA-owned pole mounted

Great Lakes Water Authority Page 25 of 49 December 2 , 2025 disconnects (when allowed by DTE) and (d) install and remove required temporary grounding clusters.

.w. Draining and refilling of liquid-filled transformers or high voltage compartments and changing of gaskets for oil-filled compartments will not be required as part of the preventive maintenance unit prices. If handling, draining and refilling the oil becomes necessary to perform the specified electrical testing or inspections, it will be addressed under the Contract provisions for extra work. This includes the costs related to the logistics required to get the equipment to handle and store the oil to and from the site.

.x. Note: Unit Price Item #4-12 PM-12 is not applicable to WRRF Transformers A and B which will be addressed on an extra work basis instead of under the unit price.

15. PM-12A On-Load Tap Changer Inspection (Per Transformer)

.a. Check and inspect load tap changer visually to identify any defects. Clean and inspect mechanical parts. Measure and record resistance of transition resistors, contact wear (if accessible), and insulation distances (if accessible). Inspect motor drive, drive shaft, protective relays, heaters and other components recommended by the manufacturer. Perform functional test.

.b. Perform primary and secondary winding resistance test, including the in-use tap on transformers equipped with non-load tap changers, the primary in use tap and all secondary tap positions on transformers equipped with on-load tap changers.

.c. Draining and refilling of liquid-filled transformers or high voltage compartments and changing of gaskets for oil-filled compartments will not be required as part of the preventive maintenance unit prices. If handling, draining and refilling the oil becomes necessary to perform the specified electrical testing or inspections, it will be addressed under the Contract provisions for extra work. This includes the costs related to the logistics required to get the equipment to handle and store the oil to and from the site.

16. PM-13 Neutral Grounding Resistor (per Resistor Bank)

.a. Inspect the neutral resistor for any corrosion or damage.

.b. Clean neutral resistor and insulation.

.c. Check electrical connections for overheating and discoloration.

.d. Check for tightness of electrical connections by calibrated torque wrench.

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.e. Using a 2500VDC megger, megger phase to ground and record the readings

.f. Perform a resistance test.

17. PM-14 480V and Medium Voltage Indoor or Outdoor Substation Lineup or Switchboard (Per Vertical Section of Lineup)

.a. Open the back doors or covers and check the integrity of the door seals, if applicable.

.b. Inspect roof (if applicable) for leaks.

.c. Check filters, clean and replace using owners stock when available if filter cannot be cleaned. Costs for replacement of filters and door seals, if required, will be addressed under the Contract provisions for extra work.

.d. Check the cubicle heaters for proper operation (if applicable). If heaters cannot be energized during testing perform continuity testing to verify operability.

.e. Inspect the…