Presentation is loading. Please wait.

Presentation is loading. Please wait.

Envirotemp® FR3® Fluid Cold Temperature Performance January 21, 2008.

Similar presentations


Presentation on theme: "Envirotemp® FR3® Fluid Cold Temperature Performance January 21, 2008."— Presentation transcript:

1 Envirotemp® FR3® Fluid Cold Temperature Performance January 21, 2008

2 2 FR3 Fluid Benefits Environmental –Rapidly & Completely Biodegradable –Renewable Resource Fire Safety –Easy Safety Code Compliance Indoors & Near Buildings Enhanced Insulation Performance –Extends Paper Thermal Life –Asset Life Extension or Increased Loading Possible FR3 Fluid = Innovative Transformer Technology

3 3 FR3 Fluid Cold Performance Higher Viscosity & Pour Point May Affect Handling & Storage Procedures –Heating Required for Pump Rates Similar to Mineral Oil Water Saturation Very Unlikely –Significant Risk of Free Water in Cold Mineral Oil Maintains Dielectric Strength at Low Temperatures Reliable Cold Dielectric Performance

4 4 Cold Performance - Distribution Transformer Cold Start –Passed Sudden 100% Load Tests at – 30 C (- 22 F) –No Load Losses Sufficient to Warm Fluid Distribution Transformer Components –Sectionalizing LB Switches – Full Ratings to -20 C –Bayonet & ELSP – Full Ratings to – 20 C –NL Tap Changer Operation to -20 C –VFI Operation to -10C –Magnex Operation to 0 C CPS Voltage Regulators –Automatic Motor Operation Lock-Out at -10 C –No Load Losses Sufficient to Warm Fluid No Cold Temperature Field Problems Reported

5 5 Cold Performance Power Transformers LTC –Thermal Lock-Out at -10 C Recommended –Synthetic Ester Alternative (- 60 C Pour Point) Forced Oil Cooling Pumps –Case-by-Case Approval, but typically OK –Overcurrent Protection Adjustments for Cold Start –Special Shutdown & Start-Up Procedures to Keep Oil in Radiators Warm Radiators –Tests Confirm Self Clearing During Cold Start Case-By-Case Evaluation – Typically Positive

6 6 Climatic Data

7 7 Taken from NOAA data files Typical parameters are: –Annual record extreme minimum –Annual mean extreme minimum

8 8 Annual Record Extreme Minimum

9 9 Annual Mean Extreme Minimum

10 10 Climatic Data By City Lowest Daily Temp (Record Extreme) and Lowest Daily Ave Temp (24-hour period). Number of occurrences at 1 and 3 day periods Relate to FR3 fluid properties at time and temperature Related to FR3 Fluid in a Transformer

11 11 Typical Climatic Data Historical Data: Chicago OHare From Lowest Daily Temperature: -27F Lowest Daily Average Temperature: -18F 14X 12X 1.1X 0.8X 0.2X 0.0X 14X 12X 1.1X 0.8X 0.2X 0.0X Average Occurrences/year for 1-day and 3-day FR3 fluid properties for a given temperature and time

12 12 Map of Climatic Data Click on city name for additional details Annual Mean Extreme Minimum Temperature Albert Lea, MN Lansing, MI Fargo, ND International Falls, MN Minneapolis, MN Pierre, SD Dubuque, IA Cedar Rapids, IA Fon Du Lac, WI Milwaukee, WI Chicago, IL Rockford, IL Bangor, ME Hightstown, NJ Philadelphia, PA Roanoke, VA Boise, ID Lincoln, NE Olympia, WA Salem, OR Cheyenne, WY Denver, CO Billings, MT Ft. Wayne, IN Columbus, OH Helena, MT Salt Lake City, UT Albany, NY New York, NY

13 13 Climatic Data: Denver, CO Historical Data: Denver AP From Lowest Daily Temperature: -25F Lowest Daily Average Temperature: -17F 7X 5X 0.7X 0.4X 0.1X 0X 7X 5X 0.7X 0.4X 0.1X 0X Return to Map

14 14 Climatic Data Conclusion: Periods of extended cold are less often and less extreme than intuitive For example, Chicago: –Number of occurrences of –20C (-4F) are only: 1-day: Once/year 3-day: Once every 2 years –Number of occurrences of –25C (-13F): 1-day: Only once every 10 years Return to Map


Download ppt "Envirotemp® FR3® Fluid Cold Temperature Performance January 21, 2008."

Similar presentations


Ads by Google