Specification.pdf

Transformer Oil Dry Out Purification System and Trailer

Introduction: The Department of the Interior, Bureau of Reclamation, Grand Coulee Dam, Grand Coulee Washington has a requirement for a brand name compact, portable, online/offline transformer oil purification and vacuum dehydration system that will remove free, emulsified and dissolved water to below 10 parts per million (PPM) as well as dissolved gases and particulate from Type I and Type II transformer oils while the transformer is energized (online) and de-energized (off-line). In addition, each unit will be permanently affixed to an enclosed trailer platform.

1. System Requirements:

1.1. Each unit will be new, unused, independently portable, and functioning.

1.2. The system/units shall be controlled via an automated system for start-up and shutdown to minimize potential operator error. Once started, the system shall have automated features and safety shut-offs and require minimal adjustments.

1.2.1. The system shall have an automatic mode and a manual mode.

1.3. The system will be capable of being used on multiple transformer generator banks.

1.4. During normal processing, the system shall be able to process-dehydrate transformer oil at a minimum speed of 10 gallons per minute with vacuum applied from a maximum distance of 100 feet horizontally and 20 feet vertically (Up/down) with no degradation in the flow rate using the oil transfer hoses supplied with the system.

1.5. The system shall be able to service; on a continuous basis, transformers that contain anywhere between 150 gallons to 8,000 gallons either as independent units or working as one complete system/unit.

1.6. The units shall have the necessary connections to receive power from a 3ɸ 480V 60Hz electrical connection and shall be protected with an adequately sized electrical protection scheme.

1.7. The system shall be designed to process transformer oil from online transformers as well as offline transformers.

1.8. All sealing material must be compatible with both Type I and Type II transformer mineral oils.

1.9. All interconnection piping and connections must be 304 stainless steel minimum; must be noted in submission.

1.10. Vacuum Chamber must be constructed of 304 stainless steel minimum; must be noted in submission.

1.11. The transformer system shall suffer no degradation or damage that would affect the system performance per this specification while the oil dryout system is running continuously and unsupervised for a minimum of 24 hours or more.

1.12. The system shall produce the following results as a minimum from incoming Type I or II transformer oil at 10 Gallons per Minute (GPM)/600 Gallons per Hour (GPH) from incoming used transformer oil at 60ºF.

1.12.1. Reduce the moisture in the transformer oil from an average of 100ppm to 10ppm or less, the limit specified within IEEE C57.106-2002 as measured by ASTM Standard Method D 1533-00.

1.12.2. Reduce the dissolved gas concentrations to trace levels as determined by a dissolved gas analysis.

1.12.3. Restore the dielectric strength of the transformer oil to no less than 30kV/52kV according to the test standard ASTM 01816.

1.12.4. Restore the interfacial tension of the transformer oil to at least 40 dynes/cm according to test standard ASTM 0971 or 02285.

1.13. The oil dryout system shall have the ability to control the inlet/outlet flow pressure. Systems will also have the ability to automatically shutdown in instances where the oil pressure is higher or lower than the system flow requirements.

1.13.1. Automatic changeover for filter issues (Bypass) to allow continuous operations.

1.14. The system shall alert, through audible and visible light alarms conditions within the system including at a minimum, warning, immediate and urgent in system.

1.14.1. Filter change requirement: Inadequate flow; High condensate levels.

1.14.2. Pressure Over/under

1.14.3. Heat

1.14.4. Vacuum: loss of vacuum, high vacuum

1.14.5. Temperature

1.14.6. Over/Undervoltage

1.14.7. Particulate count and percent moisture sensing

1.15. System heating elements to raise the temperature of the oil being filtered; the heating elements shall be designed to bring the incoming transformer oil up to the temperature that maximizes the oil recondition efficiency and effectivity while minimizing the stress on the oil as defined by the oil manufacturer and allows the system to function within the local environmental extremes.

1.15.1. Heating compacity must be a minimum of 64Kw and be low watt density type.

1.15.2. Heat shall be automatically controlled with heater controller display real time temperature and set point information.

1.15.3. Local operating Environment per this specification includes but is not limited to the following outside operating conditions.

1.15.3.1. Temperature: -15ºF to 120ºF

1.15.3.2. Relative Humidity: 0% to 100%

1.15.3.3. Wind: 0 to 65 mph in any direction

1.15.3.4. Rain/Snow: Windblown and/or driving

1.15.3.5. Icing: build up to 3” in depth

1.15.4. The heating elements shall be also controlled by a thermostat that can maintain the oil temperature within a range of ± 1ºF.

1.15.5 In the event of a control or system failure the heating elements shall shut down to prevent damage to the equipment, system, and oil.

1.15.6. Heating elements should be designed not to exceed the oil manufacturer’s maximum oil temperature, or any system/unit maximum temperature for components.

1.15.7. The heating system shall have a standalone display that shows the temperature of the incoming oil, the oil temperature going through the system/filters.

1.16. All electrical controls enclosures shall be UL Listed and at a minimum NEMA 3 rated.

1.17. System shall have the necessary connections to receive power with adequate electrical protection scheme.

1.18. All components shall be accessible and serviceable while on the trailer.

1.19. All electrical components shall be built to NEC/UL standards.

1.20. Trailer shall have forklift guides and lifting eyes.

1.21. Piping shall be configured to allow for manual bypass of the vacuum and use only filtration and heaters for the treatment of carbonized oil.

1.22. Operating noise emitted from functioning unit/system shall not exceed 70 Db at 20 feet.

1.23. Equipment will be stored outside and must be able to withstand extreme tempertures, at a minimum between, -15ºF to 120ºF.

1.24. The dryout unit will be mounted to individual portable trailers with all specified components and safety equipment (Safety chains, Fenders, etc.); these trailers must be legally equipped to be towed on Washington State roads without additional permitting.

1.24.1. Vendor to supply trailer, sized and rated for on the road towing, commensurate with equipment weight.

1.24.2. Trailer will have a minimum of a class 2 towing set-up.

1.24.2.1. Must have access to all individual components through weather proof access doors or panels.

1.24.3. If unit is mounted on skids the rear door of the trailer will be wide enough for skid removal.

1.25. Inlet and Outlet hose assemblies

1.25.1. Hoses will be of high-quality vacuum rated petroleum hose with steel re-enforcement with integrated grounding.

1.25.2. Inlet hose will be at a minimum, 25 foot long.

1.25.3. Discharge hose will be at a minimum, 50 foot long.

1.25.4. Each hose assembly will connect to vacuum rated solenoid valves at the fill and drain ports or the transformer. Solenoid valves with compatible connections to be provided as system components.

1.25.5. M12 micro cord set assembly connects each valve and will be controlled by the Dryout System Control Panel.

1.25.6. In the event of an alarm situation that caused the system to shut down, the solenoid valves will close and isolate the transformer from the system.

1.25.7. Hoses will be Lock-On Braid hose for petroleum-based synthetic and ester-based transformer oils and Vacuum Rated.

1.25.8. The hoses shall be pressure tested to 150 PSI and will be tagged with the test certification and date of test. The hoses shall have female JIC swivel end fittings.

1.26. Solar Charging System for PLC Memory retention, minimum of 12V.

1.26.1. Battery should be Gel type.

ITEM: High Purity Northwest Part Number: Thermo-Vac Mini-MOPS System HPNW-

MOPSTVG1-10-480V-VFD-64KW-DSA40-2/SS518/HR

2. References

2.1. IEEE C57.106-2002 as measured by ASTM Standard Method D 1533-00: Guide for Acceptance and Maintenance of Insulating oil in Equipment.

2.1. ASTM D1816: Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using

VDE Electrodes.

2.2. ASTM D3487: Standard Specification for Mineral Insulating Oil Used in Electrical Apparatus.

2.3. NEMA 3: Enclosure’s construction for either indoor or outdoor use to provide a degree of protection with respect to harmful effects of the equipment due to the ingress of water and that will be undamaged by the external formation of ice on the enclosure.

3. System Documentation (After award)

3.1. The documentation included with the system at delivery shall include, at a minimum, the following.

Digital versions are acceptable.

3.1.1. Two (2) Operator’s Manuals and two (2) Maintenance/Parts Manuals for the supplied system.

3.1.2. A complete itemized inventory of all components in the proposed unit broken out with a separate spare parts list.

3.1.3. Flow diagrams of the complete system including all pumps, valves, filters, chamber, etc. to include schematics and diagrams.

3.1.4. A comprehensive list of all system components which are supplied in accordance with these specifications. The list shall include the manufacturer, part number and any other pertinent details to facilitate future maintenance; including Points of Contact.

3.1.5. List of consumables that are delivered with the system including information and specifications sheet.