Transformer Options For Fire Sensitive Locations

Please download to get full document.

View again

of 8
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Information Report
Category:

Crosswords

Published:

Views: 3 | Pages: 8

Extension: PDF | Download: 0

Share
Description
I. Oil A. Conventional II. Less-Flammable Liquids A. Fire-Resistant Hydrocarbons (R-Temp Fluid) Low Transformer Cost Lower Viscosity at Low Temperatures Liquid Dielectric Performance Low Maintenance Cost
Transcript
I. Oil A. Conventional II. Less-Flammable Liquids A. Fire-Resistant Hydrocarbons (R-Temp Fluid) Low Transformer Cost Lower Viscosity at Low Temperatures Liquid Dielectric Performance Low Maintenance Cost Biodegradable/Low Toxicity Fluid Preventative Maintenance (DGA) per IEEE C Loadbreak Operations Long Service Life Expectancy Easy to Reprocess/Dispose Pour Point -35 C Flawless Safety Record Since Introduction (1975) Excellent Loadbreak Performance Excellent Dielectric Properties Field Proven Through 550 kv BIL Page 1 of 8 Requires Vault per NEC Article 450-C (Indoor) Higher Installation Cost Relatively Low Fire Point Not Favored by Insurance Companies Containment with Absorption Bed May Be Required Deluge Extinguishing System May Be Required Longest Clearance Distances Excessive Minimum Clearance Distance May Be Required (Outdoor) Fire Barriers May Be Required (Outdoor) Not Classified as Edible Oil Non-Renewable Resource Based Higher Viscosity at Low Temperature Liquid Containment Means Required per NEC (Indoor) Biodegradable Fire Point 300 C Widest OEM Acceptance Low UL Fire Hazard Value (4-5) Essentially Non-Toxic to Humans Excellent Compatibility Not Listed as Hazardous Waste Easy to Reprocess/Dispose Good Stability/Essentially Non-Sludging UL Classified - Bayonet with CL Fuses Allowed FM Approved UL Classified Lower Cost COOPER POWER SYSTEMS Dielectric Fluids Products 1900 East North Street Waukesha, WI ; FAX Higher Cost than Conventional Mineral Oil 3% Mineral Oil Contamination Reduces Not Classified as an Edible Oil Pour Point 21 C A. Fire-Resistant Low Maintenance Cost Hydrocarbons (cont d) Available in Listed Transformers Excellent Very High Temperature Stability (Aramid Paper Aging Test Passed at 250 C, 4000 Hours) Preventative Maintenance (DGA) per IEEE C NEC Recognition Since 1977 NESC Safeguard Recognition Since 1993 Listed Transformer Option Available Long Service Life Expectancy Fully Miscible with Conventional Transformer Oil, Natural and Synthetic Esters and Most Askarel Substitutes B. Natural Ester (Envirotemp FR3 Fluid) Flawless Safety Record Since Introduction (1997) Time to Kraft Paper End-of-Life Improvement 5-8 Times Excellent Dielectric Properties Excellent Clarity Rapidly and Completely Biodegrades Low Viscosity Best Lubricity Non-Toxic Generally Good Compatibility Not Listed Hazardous Waste Essentially Non-Sludging Low Maintenance Cost Preventative Maintenance (DGA) Food Grade Ingredients Renewable Resource Based Low UL Fire Hazard Value (4-5) Page 2 of 8 Higher Cost than Mineral Oil Liquid Containment Means Required Per NEC (Indoor) Some Material Incompatibilities (Certain PVCs) Pour Point 21 C B. Natural Ester (cont d) Ease to Reprocess/Dispose Good Stability UL Classified Bayonet with CL Fuses Allowed FM Approved UL Classified NEC & NESC Safeguard Recognition Listed Transformer Option Available Long Service Life Expectance Complies with Edible Oil Act Fully Miscible with Conventional Transformer Oil, High Molecular Weight Hydrocarbons and Most Askarel Substitutes C. Synthetic Ester (Envirotemp 200 Fluid) Flawless Safety Record Since Introduction (1984) Excellent Loadbreak Performance Excellent Dielectric Properties Essentially Non-Toxic Rapidly Biodegrades Lowest Viscosity of Less-Flammable Fluids Best Lubricity Generally Good Compatibility Not Listed Hazardous Waste Essentially Non-Sludging Low Maintenance Cost Preventative Maintenance (DGA) Long Service Life Expectancy NESC Safeguard Recognition Since Very Low Pour Point (-55 C) Page 3 of 8 High Cost Liquid Containment Means Required per NEC (Indoor) Some Material Incompatibilities (Certain PVCs) Not Listed by UL or FM D. Silicone Overall Good Fire Safety Record Non-Biodegradable (Dienthylsiloxane) Lowest Viscosity at Low Temperatures Persistence Potential in Environment Very Low Pour Point Produces Hazardous By-Product Excellent Stability ( 150 C) Particulates When Combusted (Oxides of Excellent Clarity Silicon, 80% of Liquid Weight) NEC Recognition Since 1977 Higher Viscosity at Nominal Operating NESC Safeguard Recognition Since Temperatures 1993 Low UL Fire Hazard Value (4-5) Material Non-Compatible (Silicone & FM Approved Standard Gaskets, Petrolatum, etc) UL Classified Not Compatible with Most Loadbreak Wide OEM Acceptance Operations Poor Lubricity Silicone Contamination (ppm) Can Cause Conventional Oil Foaming Under Vacuum Special Concern for Paint Line Contamination Very High Cost Disposal Difficulties & High Cost UL Classification Doesn t Allow Bayonet Fuses in Silicone Containment Means Required Indoor Adjudicated Liability on Adverse Health Effects of Silicone Implants Non-Self Healing Under Temporary Dielectric & Heat Overstress (Can Form Semi-Conductive Bridging) DGA Per IEEE C Not Applicable Not Miscible with Conventional Transformer Oil, Natural or Synthetic Esters, or High Molecular Weight Hydrocarbons Page 4 of 8 E. Synthetic Hydrocarbons (Polyalpha Olefins) Excellent Dielectric Properties Good Low Temperature Viscosity Excellent Lubricity Essentially Non-Toxic Biodegradable High Cost Limited OEM End-Users III. Non-Flammable Liquids/Gases A. Perchloroethylene No Fire Point Used for Retrofilling PCB Transformers (Interim and Permanent) FM Approved UL Classified Low Viscosity No Longer Offered in New Transformers in USA Hazardous Material Suspected Carcinogen Listed Carcinogen, State of California Limited Equipment Manufacturers Banned for Transformer Applications by US Corps of Engineers & Others Extreme Concern for Thermal Decomposition By-Products, e.g. HCL, Trace Dioxin, Phosgene Severe Environmental Restrictions in NEC (Section ) EPA Listed Hazardous Air Pollutant B. Trichlorobenzene No Fire Point Used in Retrofilling PCB Transformers (Interim) Low Viscosity Page 5 of 8 No Longer Offered in New Transformers Hazardous Material Suspected Carcinogen Limited OEM Acceptance Extreme Concern for Thermal Decomposition By-Products, (Dioxin) Severe Environmental Restrictions in NEC (Section ) EPA Listed Hazardous Air Pollutant C. Freon No Fire Point Low Viscosity No Longer Offered in New Transformers Chlorofluorocarbon (CFC) Based Tied to Ozone Depletion Future Availability Uncertain Leaks Can Go Undetected Special Maintenance Concerns Unusual Physical Dimensions Severe Environmental Restrictions in NEC (Section ) D. Sulphur Hexafluoride (SF 6 ) No Fire Point Ease of Code Compliance No Liquid Containment Needed Excellent Dielectric Withstand Extreme Concern for Arcing Thermal Decomposition By-Products (e.g. S 2 F 10 ) Most Potent Green House Gas Evaluated by EPA Environmental Persistence Measured in Tens of Thousands of Years Larger Footprint Poor Cooling Medium High Cost of Special Transformer Design Higher Noise Level Susceptibility to Harmonic Currents DGA not Available Heat Output Stresses HVAC Lower Standard Overload Capacity Escallating Pricing Odorless, Oxygen Displacing Gas Typically Requires Remote Heat Exchanger Page 6 of 8 IV. Dry A. Open Dry Low First Cost Subject to Contamination Many Manufacturers Higher Standard Energy Losses Ease of Code Compliance Require Periodic Cleaning No Liquid Containment Needed Reported Fires Higher Noise Level Lower Standard BIL Levels High Enclosure Temperature Standard Enclosure Does Not Pass Wire Probe & Pry Test (ANSI/IEEE C ) Special Outdoor Enclosure Affects Load Capacity & Increases Cost Greater Susceptibility to Harmonic Overheating Lower Standard Overload Capability BIL Subject to Degradation Due to Contaminants (Dust, Lint, Etc.) Larger Footprint DGA Preventive Maintenance Not Available Heat Output Stresses HVAC (Indoor) Non-Self Healing Insulation B. Cast Resin Better Resistance to Contamination Than Open Dry-Type Ease of Code Compliance No Liquid Containment Needed Better Short Circuit Withstand Than Open Dry Page 7 of 8 Long Term Reliability Not Proven Higher Standard Energy Losses High Cost Difficult to Repair Coil (Cost/Lead- Time/Limited Sources) Low Standard BIL Levels DGA Preventative Maintenance Not Available B. Cast Resin (cont d) Greater Susceptibility to Harmonic Overheating Reported Explosions and Fires Epoxy Cracking Concerns (Thermal Cycling) Non-Recyclable Coils - Landfill Disposal Larger Footprint - Heavier Heat Output Stresses HVAC Requires Periodic Bus Bar Cleaning Relatively Few Manufacturers & Repair Facilities To the best of our knowledge, the information in this bulletin is accurate at the time of printing. Supporting documentation available upon request. Page 8 of 8
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks
SAVE OUR EARTH

We need your sign to support Project to invent "SMART AND CONTROLLABLE REFLECTIVE BALLOONS" to cover the Sun and Save Our Earth.

More details...

Sign Now!

We are very appreciated for your Prompt Action!

x