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.

Center Tap Transformer

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TEMCo - The Best Selling Custom Transformers in America

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

Phase Converters
TEMCo Rotary Phase Converters provide balanced 3-phase power converted from a 1-phase power source.

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

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

Electric Generators
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 Drives
TEMCo caries a range of high quality VFDs are wholesale prices. Applications range from controlling speed, torque, breaking, direction, multi-speed, etc.

Custom 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.


State-of-the-Art Center Tap Transformer Manufacturer Offering Top Quality at Wholesale Prices

Center Tap Transformer

Center tap transformer” may be most commonly used to define two different applications.  The first is in the case of single phase applications. The second is three phase “delta connected” applications. In both scenarios, The term “center tap” is referring to the secondary (output) side of the transformer.

In either case the center tap or “neutral” to line (main connection) voltage will be half of the line to line voltage for the transformer’s secondary (output). This provides two separate circuits which operate out of phase with each other and may not be combined for increased low voltage output capacity. Each circuit will be capable of half of the output capacity of the secondary winding that they split.

Single-phase Center Tap Transformers :

Single phase transformers for use in commercial and residential building electrification are commonly configured with a center tap. This is used to divide the output or secondary voltage on a transformer to supply both low voltage distribution and a higher voltage used for powering machinery. A common variation of this scenario in the United States is single phase center tap transformers with a secondary (output) configuration of 240 with a 120v center tap (240/120v secondary). This center connection is positioned at the halfway point of the secondary winding. This center connection is referred to as the “neutral” connection.

Determining Center Tap Circuit Capacity :

An example would be a single phase transformer with a kva rating of 10. If the center tap on a transformer having a secondary voltage of 240/120v, is used to feed two 120v circuits, each will effectively have a capacity of a maximum of 5kva each. Even if one is run at a lower capacity (>5kva) the alternate may not output more than half of the overall rating. This essentially is because the output rating is based on the amount of winding material each winding half is comprised of.  

In the event that the transformer may be used to output from both the line to line main secondary circuit and one or both of the line to neutral circuits, the ratings of each powered circuit combined must not exceed the overall rating of the transformer.

Another more complex example: You have a 10kva single phase transformer with a 240/120v secondary which is powering a machine which requires 5kva 240v. We power this machine using the two main out-put lines. So far we are using up half of the capacity of this transformer. We also plan on operating 120v loads. The remaining capacity of this transformer is 5kva. Each of the circuits for 120v (each line to neutral) will have a maximum capacity each of 2.5kva remaining. The example for a three phase transformer is slightly more complex but the same rules apply.

Three-phase Center Tap Transformers :

The center tap on delta configured three phase transformers is typically used for small auxiliary loads with the main use being the three phase output which does not use the center tap connection.

Three phase center tap transformers are used commonly with a 240v delta secondary configuration and a single 120v center tap. In this case, the center tapped winding is only used on one of the three phases. This makes the rating of each of the two low voltage circuits one half each of one of the three windings. If the transformer has a three phase rating of 30kva, each phase winding has a capacity of 10kva. Being that the center tapped winding is only used on one of the three output windings, the capacity of each of the two low voltage circuits is one half each of one third of the transformer total capacity. In the scenario above, each low voltage circuit will be capable of a maximum of 5kva.

How Center Tap Transformers Work

A center tap transformer has a wire that is connected to a point half way along one of the windings of the transformer. In a transformer rectifier, with a center-tapped transformer and two diodes it can form a full wave rectifier that allows both half cycles of the AC waveform to contribute to the direct current, make its smoother than a half-wave rectifier.

Common Center Tap Transformer Applications

The most common use for a center-tapped transformer is utility power to a residence. Most lamps and small appliances run on 120 volts, but appliances like electric stoves, hot water heaters and air conditioners use 240 volts. By using a center tap transformer, the center tap is called the neutral the other two wires are called hot wires. From either hot wire to neutral you have 120V for the lights and receptacle, but from hot to hot, you have 240 available for the stove and air conditioner.  In audio power amplifiers center tap transformers are used to drive push-pull output stages. This allows two devices operating in Class B to combine their output to produce higher audio power with relatively low distortion. Design of such audio output transformers must tolerate a small amount of direct current that may pass through the winding.

Center Tap Transformer Specialists

TEMCo is a member of the Better Business Bureau, constructing and distributing only the finest quality center tap transformers within the voltage transformer family.  Along with superior product output, providing excellent customer support is equally important to TEMCo.  Order a center tap transformer from TEMCo today and discover the utmost in satisfaction that you and your company deserve!

 *Custom Center Tap Transformer Voltage Combinations Available*

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

Center Tap Transformer
We Supply A Wide Variety of High Quality Power Center Tap Transformer Models

  


Center Tap Transformers
Center Tap Transformers





Center Tap Transformer 1

Center Tap Transformer

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Call for center tap transformer information. Transformers manufactured for sale throughout the U.S. and internationally.
 

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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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Small kVA 3 Phase Transformers Guide

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