TEMCo  Dry-Type Transformers

TEMCo Transformers are built by our transformer manufacturer suppliers to our specifications.  We offer the highest quality custom and standard transformers at wholesale prices with a wide range of spec choices:

• 100% copper transformer windings. Aluminum and other power transformer types available.

• Energy Star & Tp-1 rated transformers 

• UL and CSA LIsted on most models

• Many models in stock-Transformers in stock can ship to you today

• Custom orders have a fast, 1-week turn around to shipment.

TEMCo TRANSFORMER ADVANTAGES

  WATT+PLUS TECHNOLOGY MEANS

• Maximum Efficiency

• Lowest losses

• trouble-free performance

• longer life

TEMCo Transformer Manufacturer Plus+ Features
Copper Power Transformer Windings Can Make the Difference. Our copper coils are wound with 100% pure electrolytic high conductivity copper for long, trouble-free transformer life. If your budget is tight, we also offer other choices.

Our Power Transformers are Manufactured to Provide More Power at Less Cost.
TEMCo power transformers reduce electricity bills, meaning a faster payback. Data based on popular 45 kVA size shows $1000/year savings. That is $10,000 saved over 10 years!  Costs based on .07¢ per KW / h. Comparison is between TEMCo WATT+PLUS copper-wound transformer and conventional unit made of copper (if available).

Our unique wound core construction vs. conventional core.
The unique oval shape of TEMCo wound core construction ensures that flow of magnetic flux is carried in direction of cold-rolled grain-oriented steel for minimal core loss. A conventional transformer uses stacked lamination core assembly. 90° square corners contribute to high core losses.

Easily accessible power transformer terminal board.
Voltages are clearly shown to facilitate trouble-free connecting of line and load cables. All coil leads are directly brazed to terminal board studs to prevent heating, loosening.

Designed for cooler running.
Most all TEMCo distribution transformers are manufactured with heatproof Class 220°C materials only and designed to operate well below the maximum allowable temperature rise of 150°C.

More effective heat transfer.
To provide effective heat transfer, all our core and coil assemblies are double dipped in solventless, non-hygroscopic resin and baked thoroughly.

Quieter operation.
Anti-vibration isolators between the element and enclosure reduce vibration transfer to the surrounding structure, ensuring quieter operation.

Power Transformer Manufacturer almost 40 years
TEMCo's extensive experience allows us to specify specifications to manufacture transformers to the highest quality meeting customers various needs.


We use the T-T connection for our three phase distribution transformers to derive the inherent benefits of single phase construction: high short-circuit strength, rugged physical integrity and superior reliability. These characteristics are normally available only on pole-mounted utility-grade, oil-filled transformers where every watt lost and every hour of downtime is critical. In the T-T connected power transformers by TEMCo, the tripleN harmonics are cancelled in the magnetic circuit and do not flow in the primary windings as in competitive designs. This results in a 14% reduction in copper losses, less heat and extended transformer life.

TEMCo TRANSFORMERS MANUFACTURED FOR ENERGY EFFICIENCY
Through the use of 100% copper windings, liberal designs and wound cores, most all TEMCo general purpose transformers have full load efficiencies above 97.5%. Low magnetizing currents averaging 1% of rated amperage mean that more power is available to handle useful customer load. Because of their efficient design, our transformers comply with the CSA-802-94 standard for maximum losses.

TRANSFORMERS ANGULAR RELATIONSHIPS
Characteristics of TEMCo transformers with the T-T connection includes:
· 30° phase displacement between primary and secondary
· 120° phase angular relationship between the line voltages and between the line currents.

TRANSFORMERS VOLTAGE REGULATION
Interlacing of windings on both coils for better coupling results in superior regulation with a maximum of 2.5% voltage drop at 1.0 power factor. This means higher peak loads are possible before minimum low voltage limitations are reached, allowing required voltages to be applied to critical equipment at greater distances.

TEMCo TRANSFORMERS OFFER BALANCED VOLTAGES
Even under the most severely unbalanced load conditions, a TEMCo transformer with its 'stiff' internal neutral will not shift, ensuring that phase voltages are the same to within .2%.

TEMCo TRANSFORMER MANUFACTURER TRANSFORMERS OFFER HARMONIC CANCELLATION
Thanks to our unique design configuration, even TEMCo transformer manufacturer standard distribution transformers offer significant advantages over other standard designs. This will be especially evident where there are changes and additions to existing installations affecting the percentage of non-linear component.

*Custom Transformer Voltage Combinations Available*

Why Does TEMCo Primarily Use Copper ?

TEMCo Transformer has insisted on primarily using copper in our transformers. Why? - Because of our commitment to quality -

• Copper, due to its inherent high conductivity, ductility, and strength, has always been the ideal material for conducting electricity.

• All TEMCo Copper Transformers are manufactured with only pure electrolytic copper. The following are the reasons why:

1.  Copper, due to its inherent high conductivity, ductility, and strength, has always been the IDEAL MATERIAL for conducting electricity.

2. The conductivity of annealed copper is set equal to 100%. This means copper provides more current carrying capacity for a given diameter of wire than any other engineering metal.

3. Copper resists corrosion and creep. It will not lose strength or conductivity under conditions of high humidity nor will it break down. The protective oxide which forms is a good conductor of electricity.

4. Copper has excellent thermal conductivity and therefore stays cooler during current flow. This saves energy and promotes the dissipation of heat.

TEMCo ENERGY SAVINGS
TEMCo Transformers are energy efficient meeting the Energy Star and TP1 Rating.

The TP-1 Standard
In 1996, the National Electrical Manufacturers Association (NEMA) established the TP-1 standard to designate high-efficiency transformers. This standard calls for a minimum of 97% efficiency for single and three phase, low-voltage dry-type distribution transformers (depending on size). In order to be TP-1 rated, transformers must pass NEMA’s highly rigorous TP-2 testing procedure. Some states have mandated TP-1 rated transformers for commercial and industrial facilities, and rising energy costs and environmental concerns should prompt other states to follow suit.

Energy Star
The Energy Star label was created by the US Environmental Protection Agency and the U.S. Department of Energy to help consumers identify products that excel in energy efficiency and environmental protection. In 1998, the EPA established the Energy Star C&I Transformer Program to encourage the production of extremely efficient low voltage commercial and industrial transformers.

 

• TEMCo Dry-Type Transformers
• TEMCo Auto Transformers
• TEMCo Control Transformers
• TEMCo Step-Up Transformers
• TEMCo Step-Down Transformers
• TEMCo Isolation Transformers
• TEMCo K-Factor Transformers
• TEMCo Three Phase Transformers
• TEMCo High Voltage Transformers
• TEMCo Buck Boost Transformers

Power Transformer Sources: Power Transformer * Step Up Transformer * Step Down Transformer * Electrical Transformer * Isolation Transformer * Toroidal Transformer * Acme Transformer * High Voltage Transformer * Distribution Transformer * Transformer Manufacturer * Three Phase Transformer * Dry Type Transformer * 3 Phase Transformer * Cast Transformer * Voltage Transformers * Variac * Voltage Stabilizer * Voltage Regulators
 

 Power Transformer Information:

 Power Transformer Manufacturer

• ACME Transformers - With Acme Electric being in business over 80 years, they have always believed in offering there customers superior service, quality and technical expertise in the transformer market.
• AMVECO Transformers - AMVECO designs and manufactures toroids transformers, current transformers, and auto transformers. Most AMVECO products are custom designed utilizing their state-of-art proprietary CAD programs.  The AMVECO engineers can quickly generate designs in a matter of hours, if needed.
• Federal Pacific Transformers -  Federal Pacific is a division of Electro- Mechanical Corporation, a privately held, American owned company founded in 1958. Federal pacific offers dry-type transformers from .050 KVA through 10,000 KVA single and three phase, up to 34.5 KV, 150 KV BIL with UL approval through 15 KV.
• Marcus Transformer - Ever since they opened their doors for business a half a century ago, they have been a leader in innovative transformer design. As a family-owned company they are proud of the reputation they have earned for making quality-built transformers that deliver exceptional performance and savings.
• Hammond Transformers -  Hammond Manufacturing was founded in 1917 in Guelph, Ontario, Canada. In the last 3 decades it has expanded to the US and the international markets offering many types of power transformers. 
• TEMCo Transformers - TEMCo Transformer, a family-owned business which has been manufacturing and distributing electrical products since 1968. They focus on transformers that significantly reduce power consumption over 30 percent compared to competitive makes.
• GE Transformers - GE has been a key player in the energy industry for more than a century.  Since the installation of their first steam turbine in 1901. They have become number one provider of high-technology power generation and distribution equipment.
• Jefferson Electric Transformers - Jefferson Electric has been a pioneer and innovator of magnetic products since 1915. Jefferson broad line of dry-type transformers are backed by quality assurance systems so stringent that each and every unit gets thoroughly tested before it goes out there door.
• More power transformer brands - Check out more companies by clinking this link.

 Power Transformer Types

• Distribution Transformers - Distribution transformers are generally used in electrical power distribution and transmission power. This class of transformer has the highest power, or volt-ampere ratings. and the highest continuous  voltage rating.
• Substation Transformers - Substation Transformers are large devices which usually weigh tens of thousands of pounds.   They are filled with tens of thousands of gallons of heat transfer fluid.  Although they are typically 99.8% efficient in the transforming of electricity from one voltage to another, processing hundreds of Mega Volts-Amps of electricity force the liberation of hundreds of BTUs per second.
• Medical Grade Isolation
   Transformer - Medical Grade Transformers generally refer to the transformers used in medical devices as well as hospital, biomedical and patient care equipment. There are a number of strict safety rules, guidelines and laws governing the design, construction and the test of these transformers.
• Drive Isolation Transformer - They are used to isolate a drive from a main power line to prevent the transmission of harmonics that the drives produce back into the power line.  They stop drive harmonics from disrupting computers and other sensitive equipment.
• Toroidal Transformers - Toroidal Transformers are more efficient than the cheaper laminated EI types of similar power level. Some of the advantages are smaller size, lower weight, less mechanical hum, (making them superior in audio amplifier), low-off-load loss.

 Power Transformer Types

• Step-Up Transformers - A Step-Up Transformer is one whose secondary voltage is greater than its primary voltage.  This kind of transformer "steps up" the voltage applied to it. -
• Step-Down Transformers - A Step-Down Transformer is  designed to reduce voltage from primary to secondary.  They can range from sizes from .05 KVA to 500 KVA
• Isolation Transformers - An Isolation Transformer is a device that transfers energy from the alternating current (AC) supply to an electrical or electronic load.  It isolates the windings to prevent transmitting certain types of harmonics.
• Buck Boost Transformers - Buck Boost Transformers make small adjustments to the incoming voltage. They are often used to change voltage from 208v to 240v for lighting applications.  Major advantages of Buck boost transformers include; low cost, compact size and light weight. 
• High Voltage Transformer - There are many different types of voltage transformers. A High Voltage Transformer operates with high voltages. Typically, these voltage transformers are used in power transmission applications, where voltages are high enough to present a safety hazard.
• Medium Voltage Transformers - A Medium Voltage Transformer can be connected directly to a primary distribution circuit and generally has the most load diversity. These voltage transformers have installation practices that are generally in accordance with application recommendations from the Institute of Electrical and Electronic Engineers (IEEE).
• Low Voltage Transformers - A Low Voltage Transformer is an electrical device that transforms 120 volts (line voltage) into 12 volts or 24 volts (low voltage). Some uses for low voltage transformer are in landscaping lighting.
• Single Phase Transformers - In electrical engineering, single-phase electric power refers to the distribution of electric power using a system in which all the voltages of the supply vary in unison. Single-phase distribution is used when loads are mostly lighting and heating, with few large electric motors.
• Three Phase Transformers - Three Phase Transformers must have 3 coils or windings connected in the proper sequence in order to match the incoming power and therefore transform the power company voltage to the level of voltage needed while maintaining the proper phasing or polarity.
• Custom Transformers - Custom Transformers are designed for a certain performance specifications and size requirements.  The company works with your engineering specification. 
• Industrial Control Transformers - Industrial Control Transformers are used to convert the available supply voltage to the required voltage to supply industrial control circuits and motor control loads.
• Pad Mounted Transformers - Pad Mounted Transformers are usually single phase, or three phase, and used where safety is a main concern. Typical applications; restaurant, commercial building, shopping mall, institutional. 
• Pole Mounted Transformers - Pole Mounted Transformers are used for distribution in areas with overhead primary lines. Outside a typical house one can see one of these devices mounted on the top of an electrical pole.
• Oil Filled Transformers - Oil Filled Transformers are transformers that use insulating oil as insulating materials.  The oil helps cool the transformer. Because it also provides part of the electrical insulation between internal live parts, transformer oil must remain stable at high temperatures over an extended period.
• Dry Type Transformers - Dry-Type Transformers are available for voltages up through 34.5 kV (although the most common upper limit is 15) and KVA ratings up through 10,000 (with 5000 as the usual limit). Dry-type use air as a coolant, lowering health and environmentally concerns.
• Auto Transformers - An Autotransformer is an electrical transformer with only one winding. The winding has at least three electrical connection points called taps. Autotransformers are frequently used in power applications to interconnect systems operating at different voltage classes, for example 138 kV to 66 kV for transmission. Another application is in industry to adapt machinery built for 480 V supplies to operate on the local 600 V supply.
• More power transformer types - Read further about additional transformer types and their uses.

 Power Transformer Term Definitions

• Electrical Transformers - Electrical Transformers are devices used to raise or lower the voltage of alternating current. For instance, power is transported over long distance in high voltage power lines and then transformers lower the voltage so that the power can be used by a business or household.
• Isolating Transformers - An Isolating Transformer is a transformer, often with symmetrical windings, which is used to decouple two circuits.  An Isolation transformer allows an AC signal or power to be taken from one device and fed into another without electrically connecting the two circuits. Isolation transformers block transmission of DC signals from one circuit to the other, but allow AC signals to pass. 
• Transmission Power Lines - A Transmission Line is the material medium or structure that forms all or part of a path from one place to another for directing the transmission of energy, such as electromagnetic or acoustic waves as well as electric power transmission. Components of transmission lines include wires, coaxial cables,  dielectric slabs, option fibers, electric power lines, and waveguides.
• Transformer Voltage - The measure of the amount of force on a unit charge because of the surrounding charge.
• Transformer Phase - Most transformer are either single phase or three phase.
• Transformer Frequency - The transformer cannot change the frequency of the supply. If the supply is 60 hertz, the output will also be 60 hertz.
• Transformer K Factor - Some transformers are now being offered with a k-factor rating. This measure the transformer's ability to withstand the heating effects of non-sinusoidal harmonic currents produced by much of today's electronic equipment and certain electrical equipment.
• Primary Voltage - The coil winding that is directly connected to the input power.
• Secondary Voltage - The coil winding  supplying the output voltage.
• Harmonic Cancellation - Harmonic cancellation is performed with harmonic canceling transformers also known as phase-shifting transformers. A harmonic canceling transformer is a relatively new power quality product for mitigating harmonic problems in electrical distribution systems. This type of transformer has patented built-in electromagnetic technology designed to remove high neutral current and the most harmful harmonics from the 3rd through 21st.
• Weatherproof - Enclosed transformers come with a weatherproof standard set by NEMA.
• Epoxy Encapsulated - A process in which a transformer or one of its components is completely sealed with epoxy or a similar material. This process is normally preferred when a unit might encounter harsh environmental conditions.
• More power transformer terms - Such as inductor, ground fault, core saturation, current transformer, faraday shield, etc.

Related Transformer Products

• Voltage Regulators - A Voltage Regulator is an electrical regulator designed to automatically maintain a constant voltage level.  It may use an electromechanical mechanism, or passive or active electronic components. Depending on the design, it may be used to regulate one or more AC or DC voltages.
• AC Line Reactor - AC Line Reactors is a three phase transformer used in conjunction with AC variable frequency and DC motor drive. They are a bi-directional protective filtering device.
• Line Power Conditioners - Power or Line Conditioners regulate, filter, and suppress noise in AC power for sensitive computer and other solid state equipment.
• DC Power Supplies - Conversion of one form of electrical power to another desired form and voltage. This typically involves converting 120 or 240 volt AC supplied by a utility company to a well-regulated lower voltage DC for electronic devices.
• Rotary Phase Converters - Rotary Phase Converters are commonly used in home or small commercial or industrial settings. Rotary phase converters convert single-phase power into three-phase power. This is a very cost-effective way to power three-phase electric motors and other three phase equipment.
• Frequency Converters - A Frequency Changer or Frequency Converter is an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency.
• Voltage Converters - A Voltage Converter changes the voltage of an electrical power source and is usually combined with other components to create a power supply.
• Magnetic Motor Starters - Magnetic Motor Starters are essentially heavy duty relays mounted in boxes, often equipped with heater/thermal overloads matched to the motor they start.
• Motor Starting Auto Transformers - An Auto Transformer starter uses an auto transformer to reduce the voltage applied to a motor during start. The auto transformer may have a number of output taps and be set-up to provide a single stage starter, or a multistage starter.

For an additional resource the Best of Industry Web Directory : Electrical Power Transformer Directory section is quite useful.