Acme DC Power Supplies

DIN-Rail Mounted Power Supplies

DR Series 1.3 to 40 Amps
Acme’s new flagship line of DR Series DC power supplies are an innovative solution to a vast array of control applications. Designed to provide optimal performance with a minimal impact on installation time and space. Available in single and three phase models, from 1.3 to 40 Amps (31-960 watts) these new power supplies provide the convenience of DIN-rail mounting up to 10 Amp for a toolless installation and the versatility of a standard autoranging input to cover the most applications with the fewest models. The slim “book” profile greatly reduces the amount of space taken up on the DIN-rail and within the overall control cabinet. The fully enclosed design is touch proof and CE compliant to meet international specifications and meet the Power Factor Correction requirements of EN61000-3-2. All units are UL 508 listed and can be used at full-rated power.

 Solution Ease The DR families auto-ranging input feature provides you the versatility of using one power supply to address input voltages from 90-265 volts for single phase applications and 360-550 on three phase applications automatically– no adjustments required during installation.
Space Saving All the Acme Electric “DR Series” power supplies have been designed in a compact, slim book  profile package compatible with other modules mounted in the control panel.
Installation Made Easy All housings up to 10 Amps conveniently snap onto standard 35 mm DIN-rail assuring permanent mounting without the use of any tools. The 20 and 40 Amp housings are provided with keyholes for mounting directly to the back panel for easy installation while still benefiting from the slim book profile for maximum use of space.

Acme DC Power Supplies FEATURES
■ Fully enclosed, low profile design
■ Touchsafe
■ Reduced installation time
■ Pluggable connections
■ Fast, easy wiring connections
■ Simplifies troubleshooting effort
■ DIN-rail Mounted
■ Mounts on standard DIN-rail
■ No tools required
■ Local output indication
■ Primary switching technology
■ Two-year limited warranty

Acme DC Power Supplies INDUSTRIES
■ Automotive
■ Machine tool
■ Material handling
■ Packaging
■ Food processing
■ Panel builders
■ Automation

Acme DC Power Supplies APPLICATIONS
■ Programmable Logic Controllers
■ CNC Equipment
■ Microprocessor Circuits
■ Digital and Analog Instrumentation
■ Industrial Control Applications

SELECTION GUIDES

Acme DC Power Supplies - SINGLE PHASE

Acme DC Power Supplies - THREE PHASE

DR Duplex Receptacle

DESCRIPTIONS
Packaged in a touch-proof enclosure to eliminate the possibility of accidental shock. The universal mounting foot allows the outlet box to be mounted either vertically or horizontally in your panel. Touch-proof screw terminal block provides a reliable connection.

FEATURES
■ DIN-rail mount duplex receptacle
■ Vertical or horizontal mounting
■ Snap on foot provides fast installation or can be fixed with screws in control cabinet
■ Fits on 35 mm wide DIN-rail
■ Ground prong reversed for greater protection
■ Screw terminal connection via touch-proof terminal blocks
■ Available with GFI (Ground Fault Interrupting)
■ UR Recognized

APPLICATIONS
■ Test & Diagnostic Equipment
■ Computers/Printers
■ Power Tools
■ Soldering Iron
■ Displays
■ Lighting
■ Fan

GENERAL SPECIFICATIONS
Technical Data
Rated Voltage . . . . . . . . . . . . . . . . . . . . . . .120 V AC
Rated Current . . . . . . . . . . . . . . . . . . . . . . .15 or 20 AMPS
Maximum Wire Size . . . . . . . . . . . . . . . . . .#10 AWG
Housing Data
Color . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Black
Material . . . . . . . . . . . . . . . . . . . . . . . . . . .PVC V01550
Maximum Temperature . . . . . . . . . . . . . . .40° C
Dimensions
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.32 in. (135 mm)
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.95 in. (75 mm)
Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.56 in. (65 mm)

Redundancy Applications

For critical load applications redundancy may be required All the DR Series power supplies can be connected in parallel for redundancy, so if one power supply fails, there is adequate power reserve in the remaining unit to continue supporting the critical load

Unregulated Linear Power Supplies
Blackline Series 100 Watts to 750 Watts Bulk DC Linear Power

The “Blackline” series of Bulk DC power supplies have high surge current capability, floating output, thermal
dissipation, and computer grade capacitors –– all in an open frame construction. Units are UL recognized.

FEATURES
■ High Surge Current Capabilities
■ MTBF to 500,000 hours per MIL 217E
■ Maximum efficiency to 90%
■ UL recognized to UL 1950
■ FCC Level B EMI
■ Floating output
■ High quality transformer
■ Open-frame construction
■ Thermal dissipation
■ Computer-grade capacitors
■ Recognized to UL

APPLICATIONS
■ DC Motors
■ DC Relays
■ Industrial Machinery
■ Battery Chargers
■ Solenoids

ELECTRICAL SPECIFICATIONS
 AC INPUT
Input voltage is selectable by transformer taps for 115 or 230 Vac (10% taps are provided).
DC OUTPUT VOLTAGE RATINGS: 7, 12, 16, 20, 24, 48 Volts
MAXIMUM RIPPLE: 3% rms at nominal line voltage, at full rated load

Regulated Linear Power Supplies
SPS Blueline Series 2.0 to 144 Watts of DC Power

The “SPS Blueline” series provides 15 to 120 watts of DC power with adjustable output voltages and selectable inputs of 115/230 VAC, 47-440 Hz. Floating outputs on most models and optional OVP on most models for greater versatility.

FEATURES
■ Adjustable output voltage
■ Selectable input 120/240 Vac, 50/60 Hz
■ Wide operating temperature range
■ Remote sense capability on each output
■ Over voltage protection available on all outputs
■ Overload protection with automatic recovery
■ UL Recognized, CSA Certified
■ Most outputs rated SELV

APPLICATIONS
■ Personal Computers
■ Instrumentation
■ Control Concepts
■ Data Processing
■ Microprocessor Circuits
■ Electronic Circuits

ELECTRICAL SPECIFICATIONS AC INPUT
INPUT VOLTAGE: 120/(240) Vac on most models
INPUT FREQUENCY: 50/60 Hz
DC OUTPUT
OUTPUT VOLTAGE/CURRENT: See selection chart
All outputs are potentiometer adjustable VOLTAGE ADJUSTMENT RANGE: + 5% minimum

 Regulated Linear Power Supplies
SPW Series 15 Watts to 175 Watts

The “SPW”series regulated linear power supplies are accepted world-wide for selectable AC input voltages of
100 through 240 V and meet UL, CSA and TUV standards. These units have overload protection with automatic
recovery and 100% burn-in. All 5V output models have built-in over voltage protection.

FEATURES
■ Worldwide AC input range
■ Worldwide safety standards
■ Industry standard package
■ Built-in OVP on 5V output
■ Optional OVP for other outputs
■ Overload protection with automatic recovery
■ 100% burn-in
■ Recognized to UL, CSA Certified, and CE Listed

APPLICATIONS
■ Personal Computers
■ Instrumentation
■ Control Concepts
■ Data Processing
■ Microprocessor Circuits
■ Electronic Circuits

ELECTRICAL SPECIFICATIONS AC INPUT
INPUT VOLTAGE: 100/120/220/230/240 selectable
INPUT FREQUENCY: 47 to 63 Hz typical 60 Hz
DC OUTPUT
OUTPUT ADJUSTMENT RANGE: + 5% minimum

Frequently Asked Questions

Q What is a power supply and what does it do?
A A power supply is an electronic device that converts AC line power to one or more individual DC outputs.
Q What is an unregulated power supply and where are they used?
A An unregulated power supply provides DC voltage for applications that do not require close tolerance DC output regulation. Typical applications for unregulated power supplies are DC motors, relays, and solenoids.
Q What is a regulated linear DC power supply and where are they used?
A This is a power supply that, through additional circuitry, series pass transistors and linear IC’s; provides a regulated, low noise DC voltage. Typical applications are IC’s, micro-processors, keyboards and disc drives.
Q How are the input connections made on linears?
A All of the linear power supplies offered require the AC input to be connected directly to the transformer.
Q How are the output connections made on linears?  All of the output connections on the linears are via solder barrett terminals. The linears require the customer to solder directly to the turret terminals.
Q What is a switching power supply?
A This is a supply which converts the AC source to a high voltage (typically 350 VDC). This high voltage is used in turning on and off power switching transistors or MOSFETs to produce a DC current and voltage. The high voltage and high switching frequency (20 KHz to 100 KHz) allows a switchmode power supply to be more efficient.
That is, it needs less AC current to produce equivalent DC current than a linear power supply, resulting in less heat and a smaller package.
Q Can power supplies be operated at line frequencies other than 60 Hz?
A Yes, the Standard Power line of DC power supplies operates on 50 to 60 Hz.
Q What is efficiency?
A Efficiency is the ratio of the output power to input power. It is generally measured at full load and nominal line conditions and expressed as a percentage.
Q What is overvoltage protection (OVP)?
A Overvoltage protection is a protection mechanism for the load circuitry that prevents the output voltage from exceeding a preset limit.
Q If a switcher’s output shuts down the overvoltage protection circuit, can the unit turn on by itself?
A No, you must manually re-cycle (turn off, then turn on) the AC input power.
Q Do all power supplies require an AC ground?
A Yes, all AC input connections require a ground. On the switching power supplies, the ground is provided on the AC barrier strip or chassis. Linear power supplies have AC grounding directly on the transformer or chassis.
Q Can a power supply be loaded according to its wattage rating alone?
A No, each output on a power supply is rated for voltage and current. The power supply is selected for each application according to the voltage and current requirements.
Q What is meant by regulation in a power supply?
A Regulation is the change in value of DC output voltage resulting from a change in either the output’s load or the AC line voltage.
Q What is a regulator?
A The regulator is the part of the power supply that controls the output voltage level when there is a change in the line or load.
Q What is remote sensing?
A Remote sensing is a method of moving the point of regulation from the output terminals to the load.
Q Why should the sense terminals be connected in either local or remote?
A If the sense leads are not connected, this could cause the output voltage to go high. If the output has over-voltage protection, the output will shut down.
Q Are there any special considerations that provisions must be made for when remote sensing?
A Yes, when remote sensing is used, the sense leads must be as short as possible and twisted to avoid picking up stray noise.
Q What is foldback current limit?
A Foldback current limit is a protective circuit of the power supply output. The foldback current limit is preset at 120%of the rated output current of the supply. If this output value is exceeded, the circuit folds back the current so that only 40% of the rated current is delivered. This prevents the power supply from trying to deliver
more than it is capable of and overheating.
Q If the current limit foldback is activated, does the power supply have to be manually reset?
A No, the unit will reset automatically.
Q What would be some possible causes of a power supply overheating?
A A. Outputs overloaded.
B. Poor ventilation.
C. Improper connection on primary side of transformer.
D. AC input voltage too high.
E. Power supply is running at full load in an environment that
exceeds temperature specs. The power supply should be derated.
Q What are floating outputs?
A Floating outputs are outputs on the supply that do not share a common return which enable the user to switch polarities.
Q What is switching frequency?
A Switching frequency is the rate at which the high source voltage is switched in a switching regulator.
Q What is the switching frequency of Standard Power switchers?
A 20 to 100 KHz.
Q What is meant by the adjustment range of the output of a power supply?
A The adjustment range is how much the output of the supply can be adjusted or changed from its rated output. This is expressed as a percentage and is accomplished through the use of a potentiometer.
Q What is ripple?
A Ripple or PARD, as it is sometimes referred to, is the Periodic and Random Deviation of the output voltage. This is usually noise induced from other sources.
Q What is hold-up time?
A Hold-up time is the total time an output will remain within its regulation after the input line voltage has been turned off.
Q What is the mean time between failure (MTBF)?
A The MTBF is the parameter used to compare the reliabilities of power supplies. It is expressed in hours.
Q Are UL designations acceptable everywhere?
A Not necessarily. There are similar agencies all over the world, but their specifications for safety vary. Many of Standard Power’s products are certified to CSA and CE licensed by TUV for IEC and VDE.

• 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.