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Lowest Prices for
Quality Mains Transformers - Guaranteed! Call Toll Free 1-800-613-2290 (US Calls) or 1-510-490-2187 (US & International) Fax 1-510-490-1507 email: info@temcotransformer.com www.TemcoTransformer.com |
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State-of-the-Art Stock & Custom Mains Transformer Manufacturer Offering Top Quality at Wholesale PricesMains TransformerCall TEMCo today for delivering leading industry products that will supply your electrical needs and help sustain your business functions, such as ordering a mains transformer for a new building or power expansion. Call us today at 510-490-2187. Mains Transformer DescriptionMains transformers are a common and in-demand transformer style. They are used as step down transformers in order to reduce voltages from the supply voltage of 230-240 in the UK or 115-120V in the U.S. and other countries that use that standard of voltage. Their secondary voltage will be a lower safe voltage for common use in a multitude of low voltage applications. While they may not be of 4 coil winding pattern; many are. Some may only be 3 wire, or 2 wire. But the difference in winding for 2 , 3 or 4 wires is so negligible, and the benefits so great, that the usual is to see a 4 coil pattern used.When a two coil primary winding pattern is used in the mains transformer, the two can be parallel connected to get full use of the windings and service the 115/120V primary service. For the 30/240V service they will be connected in series. When connected together it will be important to get them wired the correct way so as to maintain the correct sense of power flow. When 2 coil secondary windings are present the two circuits can remain separate to provide two independent supplies, or connected in series to create either a center-tapped coil or a single circuit with double the voltage.Core styles in mains transformers can be varied. The Stacked laminated core transformer design of the popular E-I frame construction is common and inexpensive to produce. But a toroidal design is much more efficient, can be smaller, and produces much less transformer noise or hum due to its unique shape and winding pattern. A 4 coil winding pattern is still available with this core. Transformer hum is a significant issue with mains transformers, especially when used with audio equipment and various scientific and special use equipment. For that reason the laminated core transformers may include a hum strap, sometimes called a belly band. This is a wide copper strip that is wound entirely around the outside of both core and windings. By doing so, it avoids forming a shorted turn condition, but will help reduce the leakage flux. Mains transformers are also used in conjunction with other circuitry to convert AC primary current to a DC current in the secondaries through use of rectifier, smoothing and regulator stages. While a rectified circuit will run some DC equipment, the DC output has a partial wave pattern from an incompletely converted AC sine wave characteristic. Smoothing by using a capacitor will help by reducing these partial wave patterns to a point where there is a small ripple left. But full use of resulting DC from such an installation for any and all electronic circuits is not complete without a regulator step. A regulator resists the current fluctuations so the last of the ripples are filtered out and a completely straight DC is available. One caveat on connecting a mains transformer. If using a partial primary for any reason (like an improper connection), as you reduce the primary load (the rated voltage of the primary side), amperage will consequently go up by the proportional amount your load was reduced. This will put stresses on your core and you may encounter humming and eventual burnout. Another caveat is, a mains transformer, even when used for DC secondary currents, is still dangerous. It is hooked to the main service coming in to the location from the power grid. Fusing is often used to protect on both the incoming side and the outgoing sides. Especially when fusing the ingoing side it is very advisable to arrange any fuse clips used so one CANNOT contact the hot side in any way and incur a dangerous shock. Mains Transformer LabelsThe primary voltage connections are often labeled (in the 4 coil version) with 0-120V and 0-120V. The secondary voltage connections are labeled in the example with output of nine volts as 0-9V and 0-9V. A center tap version would carry a label reading 9-0-9V, for example.Highest Quality Mains Transformers
Call TEMCo with your specific needs.
TEMCos technical sales department has many years of applications
experience providing design and engineering assistance for all types of
mains transformer installations.
Call Our Mains Transformer Specialists Today!*Custom Mains 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. |
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TEMCo Transformer Manufacturer Distribution: The Custom Mains Transformer Manufacturer Supplier of Choice for Electricians and Manufacturers. |
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TEMCo Transformer Manufacturer Distribution: High Quality, Efficient, Fast Turnaround of Custom Mains Transformers Manufactured to your Specs! |
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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. |
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TEMCo US + International Phone #:
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TEMCo US Only Phone #: 1-800-613-2290
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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 TransformersOther 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 Transformer GPU Power Harmonic Cancellation Automatic Voltage Regulator DC Power Supply PDU Rack PDU Power Conditioner Power Line Conditioner Load Center Switchgear Voltage Converter Combination Starter Motor Starter Disconnect Switch Magnetic Starter Oil Filled Transformer Voltage Regulation 400Hz 50Hz 60Hz Aircraft Power Unit Energy Storage Capacitor Regulator Power Supply Surge Protector Uninterruptible Power Supply Power Regulator Switching Power Supply Regulated Power Supply Voltage Stabilizer Switching Regulator Shunt Reactor Recloser UPS Convertidores de Fase Variable Frequency Drive 3 Phase Step Up Transformer Control Transformer Pad Transformer Pole Transformer High Voltage Transformer Leeson Motor Weg Motor Baldor Motor Toroidal Transformer Generator Head Sets Distribution Transformer Baldor Generator Pulse Transformer Winco Generators Dry 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 Frequency Converter 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
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