TEMCo Standard and Custom Transformer Manufacturer

TEMCo is a Transformer Manufacturer You Can Trust - a Member of The Better Business Bureau. TEMCo  Is an Accredited Member of the Better Business Bureau.  Offering Stock and Custom Transformers.

TEMCo is a Standard and Custom Transformer Manufacturer you can trust - a member of the Better Business Bureau.

Transformer Oil Dielectric Strength

Quality Built Standard and Custom Oil Filled Transformers
Your search for high quality, obscure, hard to find, or standard Oil  filled transformers is over!

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TEMCo - The Best Selling Custom Transformers in America



Oil Transformer Home
TEMCo Oil Transformer manufactures a wide variety of high quality stock and custom oil transformers. Trust TEMCo as your oil transformer manufacturer supplier.


Power Transformer Main
TEMCo Transformer manufactures a wide variety of high quality stock and custom transformers. Trust TEMCo as your transformer manufacturer supplier.


Phase Converter
TEMCo Rotary Phase Converters provide balanced 3-phase power converted from a 1-phase power source.  Also read about Static Phase Converter and CNC Phase Converters.

Motor Generator Set
TEMCo Motor Generator Sets are used to provide load isolation, frequency conversion, and phase conversion.

Electric Motor
TEMCo carries thousands of models and brands of electric motors, motor control, and drives such as Baldor Motors, WEG and Leeson at wholesale prices!

Power Generator
TEMCo carries thousands of models and brands of electric generators such as Robin Generators, Pow'R Gard and Baldor Generators at wholesale prices!

Variable Frequency Drive
TEMCo caries a range of high quality VFDs are wholesale prices. Applications range from controlling speed, torque, breaking, direction, multi-speed, etc.

Custom Power Transformers
TEMCo offers highest quality custom transformers fast! 5-day turn around on most models. Call our Transformer Manufacturer Specialists with your specs. We will give you a quote and get your custom transformer order started today! 510-490-2187.

More Transformers
TEMCo offers the widest range of stock power transformer models.  Read about additional power transformer types and find the type you require today.


State-of-the-Art Stock & Custom Oil  Filled Transformer Manufacturer Offering Top Quality at Wholesale Prices

Transformer Oil Dielectric Strength

The transformer oil dielectric strength is very important in the function of the transformer.  Any significant reduction in the transformer oil dielectric strength may indicate that the oil is no longer capable of performing its vital function.  The function of the transformer oils is to provide electrical insulation and coolant for the transformer.  If the transformer oil dielectric strength is low, it can cause overheating of the transformer and possible failure.  The dielectric strength is defined as the maximum voltage that can be applied across the fluid without electrical breakdown.  Some of the reason the transformer oil dielectric strength may be reduced is water, oil degradation byproducts and cellulose paper breakdown.

Maintenance of a transformer should  be the testing of the transformer oil dielectric strength.  If the dielectric strength is low in the oil filled transformer, the oil is unfit to use regardless of any other condition.  The transformer oil dielectric strength must have 60 kV withstand voltage between two brass electrodes - 12.7 to 13 mm dia, arranged horizontally with their common axis not less than 40 mm above the bottom of the cell, with a gap of 2.5 mm.  The testing of the transformer oil dielectric strength is the most popular test on transformers, but there no single test that judges the quality of transformer oil.  Each test is significant but is only able to give only general information about the overall condition of the oil.

The oil filled transformers are most commonly used in our electric power distribution, and an oil cooled transformer is extremely reliable, but failures do occur.  Properly maintained transformer are a must to maximize their life expectancy, and transformers are too expensive to replace regularly.  With the testing of the transformer oil dielectric strength, it can give the operators fair warning that a transformer is in trouble and gives them the options of replacing it or changing it oil.  By monitoring the transformer oil dielectric strength condition, suddenly occurring faults can be discovered in time and outages can be avoided.  Not only routine oil analysis but the operation of the gas relays, the operation of on-load tap-changer, and checks for oil leaks.  The oil paper insulating system breakdown is one of the most crucial elements, and these can be detected by routine oil analysis. 

Transformer Oil dielectric Strength  - Deterioration of a Transformer

There are many factors that can cause the transformer to deteriorate.  By measuring the physical and chemical properties of oil, and certain dissolved gases, problem conditions with either the oil or the transformer can be determined.  The below list is some of the common tests performed on a transformer.

Moisture content:  Any increase in moisture content can reduce the insulating properties of the oil.  This is importance with fluctuating temperatures because as the transformer cools down, any dissolved water will become free, resulting in poor insulating power and fluid degradation.  Also excessive moisture content will also breakdown the paper insulation resulting in loss of performance.

Acid Number:  Transformer oil can oxidized under the influence of excessive temperature and oxygen.  This oxidization can results in the presence of small metal particles resulting in an increase in the acid number, due to the formation of carboxylic acids.  These particles can result in sludge and varnish deposits, and block the oil canals and doesn't provide the sufficient amount of coolant for the transformer.

Dielectric Strength:  The oil in the transformer deteriorates and is the main cause of transformer failure.  By  monitoring the oil  and the transformer oil dielectric strength it gives a clearer picture on how the transformer is performing and if any problems exist.  

Power Factor:  The power factor of an insulating oil is the ratio of true power to apparent power.  A high power factor is an indication of significant power loss in the insulating oil.  This can be caused by such things as polar contaminants, such as water, oxidized oil and cellulose paper degradation.

Dissolved Gas Analysis (DGA) - This test determines the concentrations of certain gases in the oil such as oxygen, nitrogen, carbon monoxide, carbon dioxide, hydrogen, methane, ethane, ethylene and acetylene.  This can help diagnose certain operational problems with the transformer, which may not be associated with a change in the property of  the insulating oil.  High levels of carbon monoxide may indicate a thermal breakdown of cellulose paper, while high hydrogen with methane may indicate a corona discharge within the transformer. 

Furans - Furan testing measure the degradation of cellulose paper,  As the paper ages, it degree of polymerization reduces, so its mechanical strength decreases.  Furan derivates are formed as a direct result of the breakdown of the polymeric structure of cellulose paper.

For more information of these test or information about transformer oil dielectric strength call TEMCo.  TEMCo is a leading supplier of oil filled transformer, and distribution transformers.  TEMCo has been in business for over 40 years and offers the lowest price guaranteed.  With their expert team of specialist and their large inventory, you are guaranteed the best transformer for all of your operations.

Call Our Oil Filled Transformers Specialists Today!

 *Custom Oil Filled Transformers Combinations Available*

Contact our team at TEMCo Transformer at 510-490-2187 to get your quote, place your order and arrange for shipping.

Transformer Oil Dielectric Strength

Transformer Oil Dielectric Strength




The Transformer Oil Dielectric Strength is very important in the function of the transformer.
Regular Maintenance Testing Should be done for Transformer Oil Dielectric Strength.





Transformer Oil Dielectric Strength Testing of your transformer can prevent outages.
Transformer Oil Dielectric Strength Testing

TEMCo Transformer Manufacturer Distribution: The Oil Filled Transformer Manufacturer Supplier of Choice for Electricians and Manufacturers.

Worldwide Power Transformers Manufacturer

Quick Nationwide and International Shipping from Regional Warehouses

TEMCo Transformer Manufacturer Distribution: High Quality, Efficient, Fast Turnaround of Oil Filled Transformers Manufactured to your Specs!.

Call for Oil Filled Transformer information.  Oil FilledTransformers manufactured for sale throughout the U.S. and Internationally.

Quality Companies Choose TEMCo Oil Transformer - TEMCo's Customers Include:


TEMCo has experience manufacturing electrical products since 1968. TEMCo is a transformer manufacturer supplier you can trust - a member of the Better Business Bureau. We use the latest proven technology to spec manufacture high quality industrial grade transformers and other electrical products. All our products are built to last using the highest quality standards using only the highest quality supplies. As a result, TEMCo electrical products have a long operational life, lasting many years under proper use. All models are backed by our quality warranty, offering heavy duty quality at a great price.

TEMCo is an Accredited Member of the Better Business Bureau.  Offering Stock and Custom Transformers.TEMCo is a Stock and Custom Transformer Manufacturer You Can Trust - a Member of The Better Business Bureau.

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TEMCo Transformer Manufacturer Distribution is currently looking for new resellers.
If you are a qualified reseller, call for a TEMCo Transformer reseller application.

Order Transformer Medical Isolation Transformer Medium Voltage Current Transformer Polyphase Transformer Potted Transformer Pulsed Transformer VPI Transformer Wound Core Transformer Zig Zag Grounding Transformer 3-Phase Auto-Transformer Zig Zag Transformer Double Shielded Transformer Pool Transformer Pool Light Transformer Spa Transformer Ground Transformer Water Transformer Transformer Load Commercial Transformer Copper Transformer Light Transformer Outdoor Transformer General Purpose Transformer Harmonic Mitigating Transformer TP-1 Transformer Energy Star Transformer Tap Switching Transformer Tap Transformer Multi Tap Transformer Transformer Tap Changer Vacuum Pressure Encapsulated Transformer Vault Transformer Floor Transformer Constant Voltage Transformer Single Winding Transformer Unit Transformer Auxiliary Transformer Excitation Transformer Harmonic Filter Constant Voltage Regulator Power Converter Step Up Converter

Transformer Design DC Transformer Transformer Core Electronic Transformer Autotransformer Marine Transformer Buck Boost Marine Isolation Transformer Wall Transformer Scott Transformer Transformer Type Class 2 Transformer Neon Transformer Dry Transformer Lighting Transformer ABB Transformer Make A Transformer Transformer Generator Transformer Inrush Motor Transformer Transformer Fault Padmount Transformer Transformer Chain K Factor Toroid •  Low Voltage Transformer Medium Voltage Transformer Drive Transformer Low Voltage Lighting Transformer Step Down Voltage Transformer Iron Core Transformer Transformer Bank Insulating Transformer High Current Transformer Primary Current Transformer Transformer Controls High Voltage Pulse Transformer K Factor Insulation Voltage Transformer Manufacturer Cast Core Transformer Wind Turbine Transformer

Panel Transformer Liquid Transformer Cast Transformer Liquid Filled Transformer Filled Transformer Triple Shielded Transformer Transformer Shield Pad Mounted Switchgear Pad Mounted Switch Pad Mounted Distribution Transformer Pad Mount Switches Air Transformer Stacked Lamination Core Transformer Banked Transformer 4 Coil Transformer Mains Transformer Mains Isolating Transformer Delta Transformer 220v Transformer 120v Transformer 24v Transformer 12v Transformer  Microwave Transformer Fuse Transformer Switching Transformer Surge Transformer Power Factor Transformer Neutral Transformer Meter Transformer Overload Transformer Phase Shifting Transformer Star Transformer Dyn11 Transformer High Frequency Transformer Ignition Transformer Filament Transformer Magnetic Transformer Transformer Switch Aluminum Transformer Plastic Transformer Waterproof Transformer NEMA Transformer Stainless Transformer Fiberglass Transformer Silicone Transformer Standard Transformer

Acme Transformer Models Page 1 Acme Transformer Models Page 2 Hammond Transformer Models Page 1 Hammond Transformer Models Page 2 Hammond Transformer Models Page 3 More Transformer Types Page 1 More Transformer Types Page 2 Transformer Selection Guide Transformers AC Transformer Voltage Transformer Buy Transformer New Transformer Output Transformer Transformer KVA Converter Transformer Line Transformer Toroidal Transformer Transformer Wiring 2 Phase Transformer Transformer Circuit Variable Transformer Pole Transformer Transformer Pad VA Transformer WYE Transformer Potential Transformer Transformer Protection Variac Transformer Rating Sunbelt Transformer Pacific Transformer Jefferson Transformer Electric Transformer Power Transformer Transformer Sizing Transformer Rectifier Center Tap Transformer Pad Mounted Transformers About US - TEMCo Transformer Manufacturer Custom Transformers Dry-Type Transformers Auto Transformers Control Transformers Indoor TMC Enclosed Control Transformers Indoor TMO Open Control Transformers Indoor TMTB Enclosed Control Transformers Copper Transformers Energy Star, TP1 Rated Transformers Step-Up Transformers Step-Down Transformers Harmonic Cancellation Isolation Transformers K-Factor Rated Transformers 3-Phase Transformers European Voltage Transformers European Voltage 3 Phase 60Hz Transformers European Voltage 3 Phase 50Hz Transformers Drive Isolation Transformers High Voltage Transformers Epoxy Encapsulated NEMA 4 Transformers Weatherproof NEMA 3R Transformers Transformer Manufacturer About US - TEMCo Transformer Manufacturer TEMCo Privacy Notice Oil Filled Transformers Voltage Regulator Automatic Voltage Regulator DC Power Supply PDU Rack PDU Power Conditioner Power Line Conditioner Load Center Switchgear Voltage Converter 2 Phase Transformer Power Distribution Industrial Transformer Replacement Transformer Insulation Transformer Micron Transformers Westinghouse Transformer Power Supply Transformer Instrument Transformer Pulse Transformer Substation Transformer Furnace Transformer About US - TEMCo Transformer Manufacturer Transformer Manufacturer Home

Here are a few other brands of quality transformers that we also carry:
Acme Transformers K-Rated Transformers Three Phase Transformers Distribution Transformers GE Transformers Pad-Mounted Transformers Step Up Transformers Step Down Transformers Buck Boost Transformers High Voltage Transformers Isolation Transformer Electrical Transformer Single Phase Transformer Three Phase Transformer Hammond Transformers Single Phase Transformers Three Phase Transformers Isolation Transformers Buck Boost Transformers

Other Quality Products: Diesel Generator Diesel Power Generators Diesel Generator Sets Power Generators Onan Diesel Generators Variable Frequency Drive Soft Start Drives Motor Control PTO Generator Mobile Light Tower Standby Generator

Power TransformerGPU PowerHarmonic CancellationAutomatic Voltage RegulatorDC Power SupplyPDURack PDUPower ConditionerPower Line ConditionerLoad CenterSwitchgearVoltage Converter Combination StarterMotor StarterDisconnect SwitchMagnetic StarterOil Filled TransformerVoltage Regulation400Hz  • 50Hz  • 60HzAircraft Power UnitEnergy Storage CapacitorRegulatorPower SupplySurge ProtectorUninterruptible Power SupplyPower Regulator  Switching Power SupplyRegulated Power SupplyVoltage StabilizerSwitching Regulator Shunt ReactorRecloserUPSConvertidores de Fase Variable Frequency Drive3 PhaseStep Up TransformerControl TransformerPad TransformerPole TransformerHigh Voltage Transformer Leeson Motor Weg Motor Baldor MotorToroidal Transformer Generator Head SetsDistribution Transformer Baldor GeneratorPulse Transformer Winco GeneratorsDry Type Transformer Motor Servo  • Motor Controller  • Pulse VFD  • Phase Shifting Transformer  • Variable Speed Drive  • Circuit Breaker  • PTO Generators  • Power Generator  • Electric Motor  • Onan Diesel Generator

Power Transformer  • Motor Control  • Isolation Transformer  • Step Down Transformer  • Three Phase Transformer  • Voltage Transformer  • New Voltage Transformers  • AC Transformers  • Output Transformer  • Custom Transformer  • Variac Transformer  • Variacs  • Voltage Regulator  • Circuit Breaker Panel  • Rectifier  • Electric Motor  • Power Generator  • Motor Generator  • Ship Port Electrical Power  • Cold Ironing  • Aircraft Ground Power Unit  • GPU  • Ground Power Unit  • Line Conditioner  • Industrial Generator  • Small Generator  • Home Generator  • Transfer Switch  • Generator Transfer Switch  • Natural Gas Generator  • Inverter Generator  • Propane Generator  • Wind Generator  • 3 Phase Generator  • Phase Converter  • Portable Generators  •
Portable Generator  • Standby Generators  • Power Generators Dir  • Electric Generator  • Mobile Light Towers  • Diesel Generator Set  • Diesel Generator  • PTO Generator  • Motor Control  • VFD  • Power Converter

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