Acme Industrial Control Transformer

Acme's product offers a full line of applications, from commercial general power distribution and high harmonic conditions to specific industrial motor drive/factory automation systems, to low voltage landscape lighting applications. All of Acme products are designed, constructed and rated in to meet or exceed the standards established UL, CSA CE, NEMA, ANSI and IEEE. Acme Electric Corporation was founded in 1917 in Cleveland, Ohio. Since that time, Acme has been a leader in supplying power conversion equipment to the electrical and electronic markets. Dry type distribution transformers have been a central part of the Acme product line for over sixty years.

Industrial control transformers are used to reduce supply to 230 V or lower for the operation of electromagnetic devices such as contactors, solenoids, relays, and timers. They are designed to accommodate the momentary current inrush caused when electromagnetic components are energized without sacrificing secondary voltage stability beyond practical limits.

To make the proper transformer selection, the load must be completely analyzed. . . which involves every electrically energized component in the control circuit. All electromagnetic control devices have two current requirements; the first to energize the coil; the second to maintain the contact for a definite period of time. The initial energizing of the coil, which takes 5 to 20 milliseconds, requires many times more current than normal. This is referred to as volt-ampere inrush . . . which is immediately followed by the sealed volt-amperes — the amount of current required to hold the contact in the circuit.

TA Series Open Core & Coil
Industrial Control Transformers

Industrial control transformers are used to reduce supply voltages to 230 V or lower for the operation of electromagnetic devices such as contactors, solenoids, relays, and timers. They are especially designed to accommodate the momentary current inrush caused when electromagnetic components are energized . . . without sacrificing secondary voltage stability beyond practical limits. Acme Industrial Control Transformers are dry-type, step-down transformers with the secondary control circuit isolated from the primary line circuit to assure maximum safety. Voltage regulation of Acme Industrial Control Transformers exceeds standards recommended by the National Electrical Manufacturers Association. Secondary circuit voltage drop between no-load and momentary overload remains exceptionally low. This excellent secondary circuit voltage regulation assures reliable operation of electromagnetic components and may permit the use of a smaller and less expensive industrial control transformer.

FEATURES
■ Constructed with high quality silicon steel lamination to minimize core losses and increase efficiency.
■ Designs incorporate precision wound coils for improved regulation.
■ Primary fuse blocks and secondary fuse kits available and easily adaptable.
■ Series-parallel connecting links save wiring and labor costs.
■ Sturdy phenolic terminal panel protects the coil from foreign objects and mechanical damage.
■ Copper windings on all groups.
■ 130°C Insulation class. 80°C temperature rise.
■ Wire retention on both primary and secondary terminals.
■ Mounting plate adapts to various mounting dimensions.
■ Voltage regulation exceeds NEMA requirements.
■ UL Listed, CSA Certified.
■ Attractive finish, nameplate, and design features enhance the end product.

Primary Fuse Kit with Snap-on     Jumper Link Connections
Secondary Fuse Block

Secondary Fuse Clips                                Integrally Mounted Fuse Blocks

Acme Industrial Control Transformers Meet or Exceed UL,CSA,NEMA & ANSI

Acme Industrial Control Transformers 50 through 5000 VA are UL Listed, File E79947 and CSA certified, File 7357.

Laminations — High-permeability silicon steel continuously annealed to minimize core losses. Magnet Wire—Copper magnet wire is coated with high temperature-resisting insulating film. Coils — Precision wound by machine; total turns per coil automatically counted.

Mounting— Heavy steel mounting plates add strength to core construction and provide firm mounting, slotted to facilitate installation.

Terminal Boards — Sturdy phenolic terminal boards.

Sizing Primary Fuses:
Primary Amps < 2, fuse size is 300% of rated primary current.
Primary Amps 2< 9, fuse size is 167% of rated primary current.
Primary Amps > 9, fuse size is 125% of rated primary current.

Sizing Secondary Fuses:
Secondary Amps < 9, fuse size is 167% of rated secondary current.
Secondary Amps > 9, fuse size is 125% of rated secondary current.

TA Series Primary Fuse Kits

Instructions for TA Series Primary Fuse Kit Type PL-112706 & PL-112707: Using 2 Class CC Dual Element Fuses (3000-5000 VA) Type PL-112700 Through PL-112705: Using 2 Class CC Dual Element Fuses (not supplied)

■ Meets NEC Article 450 and UL-508 requirements.
■ For use with class “CC” fuses.
■ Eliminates remote mounting of primary over current protection.
■ Covered by Acme Electric 10-year limited warranty.
Field installation is fast and easy. Simply loosen the mounting hardware slide the bracket over the transformer and
re-tighten the mounting hardware. Make the proper connections with the factory furnished jumpers  and your unit is ready for operation.

Instructions for TA Series Primary Fuse Kit

Type PL-112706 & PL-112707: Using 2 Class CC Dual Element Fuses (3000-5000 VA)

1. To mount the primary fuse kit bracket, remove the two 1/4" (.64 cm) sheet metal screws on the terminal panel on the primary (H side) of the transformer.
2. Place the slots in the fuse kit mounting bracket over the holes in the terminal and mounting bracket. To secure the fuse kit, reinsert the two 1/4" (.64 cm) sheet metal screws and tighten securely.
3. Tighten all mounting screws securely–this will secure the mounting bracket.
4. Attach the female quick connect of the jumpers supplied with the fuse kit to male quick connects on the right side of the fuse blocks – one jumper to each of the blocks.
5. Connect the ring terminal of the jumpers to the appropriate screw terminals of the transformers primary (H side). Refer to the transformer name plate for proper terminal connections.
6. Connect primary supply line leads to the screw terminals on the left side of the block –one line lead to each of the fuse blocks.

TA Series Secondary Fuse Kits
Type PL-112600, 601, 602: Use Dual Element Slow-Blow Fuse

■ Mount secondary fuse clips on terminals X1 and F or F1 using the screws supplied with the transformer.
■ Connect secondary load lines to terminals X2 and F or F2.
■ Use dual-element slow-blowing fuses such as Bussmann MFG., Fusetron Type FNM, Littelfuse or Shawmut (not supplied with fuse kits)

.TA Series Instructions for Secondary Fuse Kit
Type PL-112603: use dual element slow-blow fuse 13/32" x 1-1/2" (1.0 x 3.8 cm)

1. To attach secondary fuse kit PL-112603 to primary fuse kits PL-112700 thru PL-112707 snap the secondary single pole fuse block onto the unlabeled side of the primary double pole fuse block.
2. Install the fuse kits as instructed under the primary fuse kit.
3. Select the appropriate pair of jumpers for making the connections between the secondary fuse block and the
secondary (X-side) of the transformer.
4. Connect the female quick-connect of the jumpers supplied to one of the male quick-connects of the secondary fuse block - one jumper to each end of the fuse block.
5. Connect the ring terminal of the jumpers supplied to screw terminals X1 and F or F1 on the secondary
(X-side) of the transformer.
6. Connect secondary load lines to terminals X2 and F or F2.

Jumper Link Connections
Group A Series: 240 V parallel: 120 V
Group B Series: 480 V parallel: 240 V
Group F series: 230 V parallel: 115 V
Group I Series: 24 V parallel: 12 V
Group J Series: 480 V & 240 V: 240 V & 120 V
Group K Series: 240 V: 120 V

Exception: 150 VA transformer TA-2-32404 does not have
quick connect terminals.

TB Series Open Core & Coil Industrial Control Transformers

Acme’s TB Series Industrial Control Transformers are especially designed to accommodate the momentary current inrush caused when electromagnetic components are energized. . . without sacrificing secondary voltage stability beyond practical limits.

Acme’s TB Series transformers are dry-type, step-down transformers with the secondary control circuit isolated from the primary line circuit to assure maximum safety. Voltage regulation of Acme’s TB Series transformers exceeds standards recommended by the National Electrical Manufacturers Association. Secondary circuit voltage drop between no-load and momentary overload remains exceptionally low. This excellent secondary circuit voltage regulation assures reliable operation of electromagnetic components and may permit the use of a smaller and less expensive industrial control transformer.

FEATURES & BENEFITS

■ 600 volt class and below.
■ 50–1000 VA, 50/60 Hz.
■ 80°C temperature rise, 130°C insulation class.
■ Constructed with high quality silicon steel lamination to minimize core losses and increase efficiency.
■ Designs incorporate precision split bobbin wound coils for improved regulation.
■ Primary fuse blocks and secondary fuse kits available and easily adaptable.
■ Series-parallel connecting links save wiring and labor costs.
■ Terminal blocks allow full access for ring terminals for easy installation even with solid strand conductors.
■ Integrally molded terminal blocks with isolation barriers to prevent arc over.
■ Footprint matches TA Series for easy interchangeability.
■ Copper windings on all groups.
■ Heavy gauge steel mounting plate adapts to various mounting dimensions.
■ Voltage regulation exceeds NEMA requirements.
■ UL Listed and CSA Certified.
■ Meets or exceeds UL, CSA, NEMA, ANSI and OSHA Standards.
■ Ten-year limited warranty.

APPLICATIONS
■ Motor Starters
■ Contactors
■ Solenoids
■ Timer Circuits
■ Relays
■ Control Panels
■ Robotics

TB Series Primary Fuse Kits
Type PL-112700 Through PL-112705: Using 2 Class CC Dual Element Fuses (not supplied)

Meets NEC Article 450 and UL-508 requirements.
■ For use with class “CC” fuses.
■ Eliminates remote mounting of primary over current protection.
■ Covered by Acme Electric 10- year limited warranty. Field installation is fast and easy. Simply loosen
the mounting hardware (Fig. 1), slide the bracket over the transformer and re-tighten the mounting
hardware. Make the proper connections with the factory furnished jumpers (Fig. 2) and your unit is
ready for operation.

                            
                          figure 1                                                                          figure 2

TB Series Secondary Fuse Kits
Type PL-79924, PL-79930, & PL-79931: Use Dual Element Slow-Blow Fuse
NEW

Catalog Number       VA              Type
PL-79924*              50-1000      1/4” x 1-1/4”
PL-79930                50-350        13/32” x 1-1/2”
PL-79931                500-1000    13/32” x 1-1/2”
■ Mount secondary fuse clips on terminals X1 and F or F1 using the screws supplied with the transformer.
■ Connect secondary load lines to terminals X2 and F or F2. Use Jumper Link to connect F1 and F2.                  
■ Use dual-element slow-blowing fuses such as Bussmann MFG., Fusetron Type FNM, Littelfuse or Ferraz Shawmut
(not supplied with fuse kits).
* PL-79924: Use fuse kit on all transformers except 750 & 1000 VA with 24 volt secondary.

Secondary Fuse Kit

Instructions for TB Series Secondary Fuse Kit
Type PL-112603: use dual element slow-blow fuse 13/32" x 1-1/2" (1.0 x 3.8 cm)

1. To attach secondary fuse kit PL -112603 to primary fuse kits PL-112700 thru PL-112705 snap the secondary single pole fuse block onto the unlabeled side of the primary double pole fuse block. (See Figure 1)
2. Install the fuse kits as instructed under the primary fuse kit.
3. Select the appropriate pair of jumpers for making the connections between the secondary fuse block and the secondary (X-side) of the transformer.
4. Connect the female quick-connect of the jumpers supplied to one of the male quick connects of the secondary fuse block - one jumper to each end of the fuse block. (See Figure 2)
5. Connect the ring terminal of the jumpers supplied to screw terminals X1 and F or F1 on the secondary (X-side) of the transformer.
6. Connect secondary load lines to terminals X2 and F or F2.

                                                                                                                              FiGURE 1

                                                                                                         FIGURE 2

Selection Charts

GROUP A
120 X 240 PRIMARY VOLTS-24 SECONDARY VOLTS-10, 50/60 Hz

GROUP B
240 X 480, 230 X 460, 220 X 440 PRIMARY VOTS-120/115/110 SECONDARY VOLTS-10, 50/60 Hz

GROUP C
240/480/600, 230/460/575, 220/440/550 PRIMARY VOLTS-120/100, 115/95, 110/90 SECONDARY VOLTS-10, 50/60 Hz

GROUP D
208/240/277/ 380/480 PRIMARY VOLTS-24 SECONDARY VOLTS-10, 50/60 Hz

GROUP E
208/277/380 PRIMARY VOLTS-115/95 SECONDARY VOLTS-10, 50/60 Hz

GROUP F
380/440/550/600 PRIMARY VOLTS-115/230 SECONDARY VOLTS-10, 50/60 Hz

GROUP G
240/416/480/600; 230/400/460/575; 220/380/440/550; 208/500 PRIMARY VOLTS
99/120/130; 95/115/125; 91/110/120; 85/100/110 SECONDARY VOLTS-10, 50/60 Hz

GROUP H
208/230/460 PRIMARY VOLTS-115 SECONDARY VOLTS-10, 50/60 Hz

GROUP I
600 PRIMARY VOLTS-12/24 SECONDARY VOLTS-10, 60 Hz

GROUP J
240X 480 PRIMARY VOLTS-120/240 SECONDARY VOLTS-10, 60 Hz

GROUP K
600 PRIMARY VOLTS-120/240 SECONDARY VOLTS-10, 60 Hz

Industrial Control Transformers for Harsh Environments
Designed for Control Panels where Internal
Installation of Control Transformers is prohibited.

Some specifications require installation of large control transformers, usually 1000 to 5000 VA outside the control cabinet. This means the transformer must be in a sheet metal enclosure instead of the usual open core and coil construction method. Acme meets this need by providing all of the power, protection, regulation and performance of our standard industrial control transformers in one UL -3R enclosure. These transformers are wound with copper magnet wire, deliver full nameplate capacity, and provide the high regulation required in control applications.
Voltage combinations available are: 240 x 480V primary, 120V secondary and 240/480/600V primary, 120/100V secondary. Ratings available are 1000, 2000, 3000 and 5000 VA. All units are UL listed, CSA certified, and covered by Acme’s exclusive 10-year limited warranty.

FEATURES
■ Fully encapsulated and enclosed.
■ 55° C temperature rise, 155°C insulation.
■ Copper windings.
■ 1000, 2000, 3000, 5000 and 10000 VA sizes.
■ Voltage regulation exceeds NEMA requirements.
■ UL and UL-3R listed.
■ CSA certified.
■ 10-year limited warranty.

GROUP L
240 X 480 PRIMARY VOLTS-120 SECONDARY VOLTS-10, 50/60 Hz

GROUP L
240/480/600 PRIMARY VOLTS-120/100 SECONDARY VOLTS-10, 50/60 Hz

• ACME SINGLE PHASE TRANSFORMERS -
• ACME THREE PHASE TRANSFORMERS  -
• ACME HARMONIC MITIGATING TRANSFORMERS -
• ACME NON-LINEAR K-RATED TRANSFORMERS -
• ACME DRIVE ISOLATION TRANSFORMERS -
• ACME AC LINE REACTORS TRANSFORMERS-
• ACME ENCAPSULATED AC LINE REACTORS TRANSFORMERS-
• ACME INDUSTRIAL CONTROL TRANSFORMERS -
• ACME ENCAPSULATED INDUSTRIAL CONTROL TRANSFORMERS -
• ACME FINGER GUARD INDUSTRIAL CONTROL TRANSFORMERS -
• ACME LOW VOLTAGE LIGHTING TRANSFORMERS & POWER SUPPLIES -
• ACME BUCK BOOST TRANSFORMERS -
• ACME PANEL-TRAN ZONE POWER CENTERS TRANSFORMERS -
• ACME AIR CONDITIONING, REFRIGERATION & APPLIANCE TRANSFORMERS -
• ACME CONSTANT VOLTAGE REGULATORS & LINE POWER CONDITIONERS TRANSFORMERS -
• ACME DC POWER SUPPLIES TRANSFORMERS -

 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.