Merida SOW Switchgear Tier II PMSC 09262024.docx

U.S. Consulate General Merida UNCLASSIFIED

STATEMENT OF WORK FOR PREVENTIVE MAINTENANCE SERVICE CONTRACT

Paralleling Switchgear

United States Consulate General at Merida, Mexico

August 2024

EXHIBIT A - STATEMENT OF WORK

Tier II Switchgear Maintenance

Tier II switchgear maintenance is defined as: Visual and mechanical inspection to ensure the proper operation of all factory and vendor installed meters, breakers, controls and remote power monitoring equipment associated with the switch gear. Inspection of the entire switchgear for loose parts, connections and functioning indicator lights. Cleaning, wiping down and vacuuming of each compartment, inside and outside cabinets.

Tier II maintenance DOES NOT include testing and service of OEM electrical breakers, see Tier III SOW.

I. GENERAL INFORMATION:

The United States Consulate General in Merida, Mexico requires professional services and contractor cost proposals to perform preventive maintenance services of the facility’s electrical switchgear.

II. PROJECT REQUIREMENTS:

The Contractor shall perform preventive maintenance as described in this STATEMENT OF WORK. The objective of scheduled preventive maintenance is to eliminate system malfunction, breakdown and deterioration when units are activated/running.

LIST AND DESCRIPTION OF EQUIPMENT TO BE MAINTAINED:

III. GENERAL REQUIREMENTS:

The Contractor shall provide the labor, tools, and materials required to perform all preventive maintenance as outlined in this SOW. Consulate staff have service manuals for switchgears on-site.

IV. QUALIFIED CONTRACTORS: LICENSED ELECTRICAL CONTRACTOR.

The approved contractor must provide a licensed electrician/qualified technician to provide service on switchgear. When specific Control Work is to be performed, electrician/technician must be Factory Certified for controls being serviced, example Thompson, Kohler, CAT etc. controls combined with other manufacturers Eaton, Schneider etc.

V. SAFTEY & SPECIAL INSTRUCTIONS:

SAFTEY: Safety is the highest priority on this and all OBO/OPS/FAC projects/operations. OBO policy is to work de-energized! The team leader shall direct all of those under his/her charge to work safely. Regular safety meeting shall be held among on-site personnel and safety concerns shall be brought to the attention of the Post Safety and Health Officer (POSHO) and /or the COR/COTR. The contactor is expected to provide all required PPE for the technicians to work safely on all OBO locations worldwide. Lock Out Tag Out (LOTO) is to be strictly enforced.

VI. SCOPE OF WORK: ELECTRICAL SWITCHGEAR PREVENTIVE MAINTENANCE

Contractor shall provide all materials, supervision, labor, tools and equipment to perform preventive maintenance. All personnel working in the vicinity shall wear and /or use appropriate safety protection while all work is performed. Any questions or injuries shall be brought to the attention of the Post COR and Occupation Safety and Health Officer (POSHO) immediately. Material Safety Data Sheets (MSDS) for all HAZMAT shall be provided by the Contractor. Copies shall be provided to the COR for approval.

The systems and components to be maintained include power conducting equipment such as switches, circuit breakers, fuses and control systems such as control panels, current transformers and protective relays. The attached equipment list provides details.

1. The contractor shall provide the COR with a list of necessary parts and materials.

2. The contractor shall provide emergency assistance for switchgear support, priced at an hourly rate, within 24 hours of being contacted by the COR.

3. The Government will not provide equipment for switchgear testing: Circuit breaker lifting truck or trolley may be available at post, contact Post to confirm prior to visit.

If any discrepancies are found with the switchgear(s) that are not covered under this scope of work, then the contractor shall provide the following:

1. Detailed report noting discrepancy found.

2. Bill of Materials (BOM) to include component name, quantity, part# and price for any repair material required and material lead-time.

3. The contractor shall provide emergency assistance for switchgear support within 24 hours of being contacted by the COR.

4. Price quote for repair labor.

Shutdowns (De-energizations) must be performed off-hours and must be coordinated with post personnel.

At a minimum, the following work must be done:

1. Use appropriate personal protective equipment (PPE) when preforming work.

2. Check all work areas, tools and equipment to ensure unsafe conditions are eliminated or guarded against.

3. Follow site safety procedures.

4. Schedule maintenance with operating personnel and affected offices (security).

5. Before de-energizing equipment, verify operation of back-up power before shutdown. Return to normal after verification and proceed with shut down for maintenance.

6. Follow LO/TO procedures.

7. Lock out and disconnect/open all sources of power before preforming any work/cleaning inside equipment that has exposed live parts or present an electrical hazard.

8. Review and follow the manufacturer’s instructions for the service/cleaning requirements of equipment.

9. Remove LO/TO in accordance with appropriate procedures.

10. Record results of control work/testing in history log, if applicable.

11. Simulate utility outage after maintenance is completed to verify back up power preforms as required.

12. Report all incidents and near miss incidents to COR and assist as requested in the investigation and corrective action.

The contractor shall comply with the following:

1. Contractor shall submit to the COR for review, worksheet/checklist that will be used for preforming maintenance/cleaning service.

2. A discrepancy report shall be submitted to the COR immediately upon discovery of any conditions that could result in equipment failure.

3. Test and inspection report shall be submitted to the COR within three days of completing work.

MAINTENANCE PROCEDURES:

The purpose of this Statement of Work is to ensure the switchgear for this facility are maintained according to manufacturer’s recommendations to ensure the readiness and proper operation of the system.

Coordination of scheduling maintenance shall begin 90 days in advance. (Intent: Contractor needs to make contact with post to begin scheduling and outage coordination 90 days in advance).

A. Annual Schedule:

I. Step-One, Visual Inspection:

1. Turn on Energy Reduction Maintenance Setting (ERMS).

2. Confirm working space and clearance is maintained around all the electrical gear per the National Electrical Code (NEC) requirements.

3. Check that the switchgear room is free from foreign articles not associated with the room.

4. Visual and mechanical inspection to insure the proper operation of all factory and vendor installed meters, breakers and remote power monitoring equipment associated with the switch gear.

5. Inspect the entire switchgear for loose parts or connections. Slight discoloration or tarnish of the silver plate is normal and of no concern. Severe discoloration of the silver plate is a sign of an improper or loose contact and overheating.

6. Inspect physical, electrical, and mechanical condition including evidence of moisture or corona.

7. Inspect that all filters are in place, and the vents are clear.

8. Check to see that all anchor bolts and other structural bolts are tight.

9. Check for undue noise and vibration.

II. Step-Two, Verification:

1. Verify that Energy Reduction Maintenance Setting (ERMS) is turned on.

2. Compare the installed metering measurements with voltage and power readings from a True RMS meter. Make calibration corrections as necessary to ensure accurate voltage and power readings.

3. Verify the switchgear circuit breakers sizing match the drawings.

4. Verify the proper labeling of all the breakers in the switchgear.

5. Verify operation of heaters and thermostats, if used

6. Verify that the Post as-built drawings (electrical one-line) match the switchgear distribution. Make “Red Ink” corrections on a paper copy as necessary. Inform the COR and FM of any discrepancies or changes to the drawings.

7. Verify that the required NFPA70-E safety equipment is available and in good condition for local staff to use.

8. Refer to the manufacturers recommendations for additional maintenance requirements.

III. Step-Three, Inspect/Exercise/Clean/Correct:

De-energization requires after-hours work.

1. Schedule power outage of equipment for cleaning. Coordinate any required outage with the COR, FM, RSO, BAS Engineer, IPO.

2. Turn-on Energy Reduction Maintenance Setting (ERMS).

3. Photo of equipment condition BEFORE servicing and is required in final report documentation.

4. Perform infrared testing on all conductor connections, buss terminations. Only record hot spots on digital format for review.

5. Photo of equipment condition AFTER servicing and is required in final report documentation.

6. Perform proper Lock-out/Tag-out and ensure the system is de-energized before removing panel covers and exposing any electrical bus or cabling. Under no circumstances should the equipment be energized during the maintenance operation. Photo of equipment locked and tagged out is required in final report documentation.

7. Inspect anchorage, alignment, grounding for the equipment.

8. Inspect the bus bar connections and insulating barrier(s) for damage.

9. Inspect the cable load connectors, standoff insulators, primary contact supports, and all accessible cable terminations for indications of insulation deterioration. Vacuum each compartment and wipe off all insulation.

10. As applicable perform function tests on breakers, test trip units and settings. Replace any faulty batteries, fuses, or switches.

11. Clean each compartment. Check for damage, excessive wear, or corrosion.

12. Enclosures.

Clean all enclosure panels, doors, and structures. Make sure all ventilation openings are not obstructed. Examine where seals and/or gaskets are installed. Repair or replaced as necessary. All doors and access panels should be properly secured during operation. Where heater elements are installed, these should be cleaned, examined for damage and/or deterioration, and tested.

Examine Electrical equipment rooms for evidence of water seepage.

Examine the tops of electrical equipment enclosures for evidence of water. Any source of water should be immediately identified and corrected.

13. Check and correct any loose components or connections.

14. Busbars, Insulators, Supports, and Connectors.

Inspect, review and retorque bus and cable connections. Examine all connections for signs of overheating, cracked or broken connectors, and signs of tracking or arcing.

Inspect insulators and conductor supports for signs of cracking, broken pieces, and other physical damage or deterioration.

Clean all loose dirt with lint free rags. For tough contaminates approved solvents may be used. Examine for evidence of moisture that may lead to tracking, overheating or flashover while in operation.

Examine all bolts and connecting devices for signs of deterioration, corrosion, or overheating.

Ensure that bolts and connecting devices are tight, according to manufacturer’s specifications. Be careful not to over-torque bolts and connecting devices since insulators are easy to damage and difficult to replace.

Where copper and aluminum conductors and/or connectors are used together, examine connections for signs of galvanic action.

Ensure that the connectors are properly used and installed in accordance with manufacturer’s specifications.

Apply an antioxidant compound to all aluminum-to copper connections.

15. Torque loose connections identified during the infrared test or during inspection.

16. Confirm correct operation and sequencing of electrical and mechanical interlock systems.

17. Wiring Inspect control wiring for signs of deterioration, chaffing, cracking, flaking, or overheating.

Ensure that conductors are clean and dry.

Provide wire tugging and tightness checks on all components, including all interconnect wiring to junction boxes.

Verify ratings and continuity of all control circuit fuses.

Correct any faulty, damaged, discolored, and worn components using government provided spares.

18. Molded-Case Circuit Breakers Clean molded-case circuit breakers for proper ventilation of the breakers.

Clean the breaker housing and inspect it for cracks or signs of overheating.

Tighten all connections.

Exercise the breaker 5 times to ensure the mechanism has freedom of movement and to allow contact wiping.

Larger duty circuit breakers (225 amps or above) must be electrically trip tested to ensure proper operation

19. Battery Stations/Chargers Batteries.

Check each battery integrity, signs of damage or defects.

Thoroughly clean all battery surfaces of dust and/or dirt accumulations.

Clean and tighten all terminal connections.

Verify all brackets and hardware are properly attached and adjusted accordingly.

Remove any corrosion on battery terminals with bicarbonate of soda.

Clean battery studs and cable ends.

On stranded cables, if ends are corroded, cut off ends or separate strands and clean internally.

Verify all live terminals are protected by insulating covers.

Chargers Clean all dust and/or dirt accumulations from each charger.

Clean all vent openings and ensure that they are free from obstructions.

Check terminals and connections for tightness.

Check all relays, lights, and other indicating devices for proper operation.

Verify AC power failure alarm relay.

Verify DC under-voltage and over-voltage relays.

Verify analog and digital metering accuracy and recalibrate as required.

Test Battery Charger as per manufacturer’s recommendations.

20. Check all control circuits by tugging on each wire to verify a snug fit.

21. Surge Arrestors Clean and inspect porcelain for signs of damage or deterioration. Repair or replace as necessary.

Examine arrestor leads for damage and/or deterioration.

22. Protective Relays All necessary precautions must be taken while working with protective devices to ensure personnel safety and to avoid any unplanned interruption of service. In particular, when working on control circuits, all current transformer (CT) secondaries should be shorted to ground and never left open-circuited in order to avoid serious injury to maintenance personnel.

Inspect relays for physical damage and deterioration. Inspect gaskets and covers for damage and/or excessive wear, and repair or replace as necessary.

Clean the relay and enclosure of foreign materials, such as dust, dirt, and moisture contamination.

Check mechanism for freedom of movement, proper travel and alignment, and tightness of mounting hardware and plugs.

Using appropriate testing instruments, suitable for the relays being tested, conduct electrical testing of the relays in accordance with manufacturer’s recommendations and IEEE testing standards.

Verify Configuration and Protective settings.

23. Potential Transformers (PT) Clean and inspect potential transformers for signs of damage or deterioration.

Repair or replace as necessary.

Remove and inspect draw out PT drawers and perform visual and mechanical inspections in addition to lubrication of rollers annually.

29. Controls Perform visual inspection of all control devices for heat damage or other abnormalities.

Check control batteries and backup batteries (e.g. PLC).

Test per manufacturer’s recommended procedures.

Verify PLC operation and proper front panel indications.

Review PLC internal faults and events.

Review internal logic and settings to equal operational values as commissioned.

Perform visual inspection for heat damage or other abnormalities.

Verify programming and operation of all system controllers, including engine controllers, e.g.

PGC4000 controller.

30. Verify system operation as per the system Sequence of Operation.

31. Review Event and Fault records and verify correct date and time.

32. Remove lockout/tag out in accordance with appropriate procedures. Notify all crews that LO/TO will be removed.

33. Notify BAS Engineer.

34. Re-energizing the equipment and ensure that all components are up and functioning properly. Make the COR and FM aware of all components that are not functioning properly.

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