HAMMOND TRANSFORMERS

Hammond Manufacturing was founded in 1917 in Guelph, Ontario, Canada. The company started out manufacturing radios, power amplifiers and battery eliminators.  In the  1920's Hammond focused its efforts on the manufacturing of transformers for the broadcast and communications industries. In the 1950's and 1960's the explosive demand for electrical products created many opportunities for new products.  During these years Hammond became a leading supplier of transformers and enclosures for the electrical and electronic industries.

Hammond Manufacturing in the last three decades has expanded to the U.S. and the international markets. Hammond made a number of acquisitions of transformer companies and became one the largest suppliers to the North American electrical OEM market.  In January 2001, the Hammond Transformer Group was spun off to form a new company, Hammond Power Solutions, Inc.

Today Hammond Manufacturing is a company with customers worldwide. There 500 plus employees work to deliver their promise of quality products and service to excellence. Hammond has operation in Canada, United States and Europe.

History of Hammond Transformer    

Hammond Manufacturing started in 1917 in a small basement during the First World War by Oliver S. Hammond - tool & die maker by day and amateur inventor by night.  The company became O.S. Hammond & Son and soon included sons Len, Roy, Ken and Fred.  The shop was powered by a boiler that burned just about anything. The steam from the boiler powered a small steam engine, which turned the main shaft and pulleys.  Remember, there was no electricity service yet. Steam power, human power, light of day or lantern was a fact of life.

In the 1920 the company build early radio sets, Starting out with a single tube radio and progress to 5 to 6 tube models in 1926. Events in Korea and the beginning of the Cold War thrust the company in volumes of military transformers.

In 1978 Rob and Bill Hammond acquired control of the company and ensured the business into the third generation of the Hammond family.  The Company was re-organized into three separate centers for transformers, cabinetry and power supplies. A corporate service group was also established for the sales, marketing and distribution of catalog products.

In 1986 the Hammond went on the Toronto Stock Exchange, and in  1996 they join the World Wide Web. Sadly, both Fred Hammond and his brother Roy passed away in 1999.

On January 1, 2001 the Hammond Transformer Group was spun off to form a new independent public company, Hammond Power Solutions inc. (Bill Hammond as Chairman and CEO). Manufacturing a broad range of Dry-Type Electrical Transformers.  Hammond Manufacturing Co. (Rob Hammond as CEO) continues to produce Electrical Enclosures, Racks & Rack cabinets, Small Enclosures, Electronic Transformers & Outlet Strip.

Since the modest beginnings Hammond has grown into two medium-sized companies with combined annual sales of over $166 million and over 1,200 employees located in 12 facilities around North America, the UK and Australia.

Hammond Transformer Products Include:

o     HAMMOND INDUSTRIAL CONTROL TRANSFORMERS

o     HAMMOND  BUCK BOOST TRANSFORMERS

o     HAMMOND   LINE REACTOR TRANSFORMERS

o     HAMMOND DRIVE ISOLATION TRANSFORMERS

o     HAMMOND MOTOR STARTING AUTO TRANSFORMERS

o     HAMMOND LOW VOLTAGE LIGHTING TRANSFORMERS

o     HAMMOND GENERAL PURPOSE DISTRIBUTION TRANSFORMERS

o     HAMMOND K-FACTOR TRANSFORMERS

o     HAMMOND ENCAPSULATED TRANSFORMERS

o     HAMMOND  AUTOTRANSFORMERS

o     HAMMOND GENERAL PURPOSE MEDIUM VOLTAGE TRANSFORMERS

Below are a few of Hammond Transformers and there features:

General Purpose Distribution Transformers 
Hammond's single phase and three phase general purpose distribution transformers are rated for 600 volts and below.  They are generally used for supplying appliance, lighting, motorized machine and power loads from electrical distribution systems. They are either ventilated or totally enclosed, and are available with either aluminum  or copper windings in standard ratings from 50 VA up to 750 KVA.

Encapsulated General Purpose Transformers
Encapsulated transformers are standard general purpose distribution transformers encased in a electrical grade silica and epoxy, and totally enclosed in a heavy duty NEMA 3R style enclosure.  All leads are bought out to a separate front accessible termination compartment.  All encapsulated transformers are available with copper windings in single phase ratings from 0.05 KVA up to 37.5 KVA and three phase ratings from 2 KVA up to 45 KVA. Typical applications of encapsulated transformers are pulp and paper plants, steel mills, food processing plants, breweries, mines, marine and shipboard installations etc.

Control Transformers  
Hammond offers a complete line of control transformer products. From high inrush industrial models to CE marked from HVAC open style to din rail mount and buck-boost to enclosed units as well. Ratings offered range from 25VA up to 7500Va on some models in as many as 19 different voltages.

600V Class Dry-Type Distribution Transformers
Hammond offers one of the broadest ranges of dry-type distribution transformers in North America.  This includes single and three phase general purpose transformers, non-linear transformers, energy efficient transformers, low temperature rise transformers, low voltage lighting transformers, encapsulated transformers and three phase drive isolation and autotransformers. Available in standard ratings from 9 KVA to 750 KVA in many voltages, each of these products is also available in custom ratings and voltages.

Control Transformers

Hammond offers a complete line of control transformer products:

•  From high inrush industrial models (PH Series)

•  CE marked (PT Series)

• HVAC open style (SL Series)

•   din rail mount (PHD & PTD Series)

•   buck-boost (BK Series)

• enclosed units (E Series)

•  Ratings offered range from 25VA up to 7500VA on some models in as many as 19 different voltages.

PH Series Control Transformers

The Hammond "PH" series of molded machine tool control transformers are specifically designed to meet industrial applications where electromagnetic devices such as relays, solenoids, etc. are used. These control transformers maximize inrush capability and output voltage regulation when electromagnetic devices are initially energized. The PH Series are molded from 25VA up to 1000VA and are an open style unit from 1500VA up to 5000VA. They are available in many primary and secondary voltage combinations, are designed for 60Hz operation and are available with a full array of features including 10 fusing options and optional clear plastic 'finger safe' terminal covers.

 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.