Transforming Power Since 1956
Our superior quality assurance program and fast express delivery ensure top-rated power transformers with exceptional PPM (parts per million) performance.
As a trusted Canadian electronics manufacturer, we collaborate closely with you to build custom components tailored to your specific needs. Each power transformer is carefully assembled in-house with precision and care, backed confidently by a comprehensive 5-year warranty for reliable performance and peace of mind.
Example Types of Power Transformers:
- Autotransformers
- Rectifier
- Audio
- Isolation Transformer
- Constant Voltage
- Ferro-Resonant
- Constant Current
- Battery Charging
- Foil-wound
- 400Hz Transformers
- High-Leakage
- High Reactance
- Water-cooled
- 3-Phase
- Control
- Step-Up
- Step-Down
Recent Work
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High Voltage Transformer 7500–9400Vac output (EC Custom Model 220034)
This open-type transformer is used to generate a high voltage output in an air purification system.
- Input Voltage: 240–300V
- Output Voltage: 7500–9400V
- Frequency: 25–30kHz
- Power: 1500VA
- Ambient Temperature: up to 45°C
- Fits in a 130mm cylinder
- Includes thermal cutout protection
Zig-Zag "Zero Sequence" Grounding Transformer Assembly, 600V, 20A/phase
Grounding (or Zig-Zag) Custom Transformer Model 215033 shown with cover removed on NEMA 1 enclosure. Also included is a 393 mohm 60A "neutral" inductor (smaller magnetic shown). The application is for the creation of a missing neutral connection from an ungrounded 3-phase Delta system to permit the grounding of that neutral to an earth reference point; also to reduce harmonic content. During a phase to ground fault the zig-zag transformer’s coils magnetic flux are no longer equal in the faulted line. This allows zero sequence current to now flow from the point of the fault to ground and return to the zig-zag transformer’s neutral.
34kVA Airport Lighting Transformer - Constant Current Regulator Application
This example custom power transformer is rated 34kVA @ 50Hz, 400Vin, 1620Vout. Input Impedance 5% Minimum, 20% & 60% Output Taps. Constructed of MW35&36C Rectangular Copper wire coils with dog-bone ventilation assembled onto a 26M19 Electrical Grade Steel core with Class H (180C) insulation. Used in a constant current regulator for airfield lighting power and control solutions.
We Do Power Perfectly.
With decades of experience and deep expertise in power transformer design and manufacturing, we guarantee a seamless process from initial concept to final delivery. Our skilled engineering team works closely with you to tailor solutions that meet your exact specifications and demanding industry standards.
Whether for industrial, commercial, or specialized applications, we deliver power transformers engineered for efficiency, durability, and longevity.
Production runs can vary from 1 - 100,000 pieces. We design and manufacture power
transformers for virtually any application. In addition to optimizing electrical performance, our designs
incorporate critical end-use factors, including:
- Physical dimension
- Thermal requirements
- Temperature extremes
- Performance at altitude
- Operation under shock and vibration
Power Transformer Capabilities at Electronic Craftsmen
- Power: From mW to 50kVA @ 60Hz or up to 200kVA @ 20kHz (typical)
- Working Voltage up to 12kV (depending on frequency); multiple stages possible for higher outputs
- Frequency: 25Hz to 500kHz (typical)
- Temperature Class to 220C (155C / Class F typical)
- Weight: 0.06 oz / 1g to 550 lbs / 250kg
- Multiple taps as required
- Dielectric Strength (hipot) to 30kVac or 20kVdc
- Parts can be vacuum varnished or molded with a variety of hard or soft encapsulant materials with thermal conductivity.
- Wire sizes from 1-45 AWG or Copper Foil to 0.050in thick (in multiple layers for higher current); Litz wire for higher frequency
- Regulation to specification
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Manufactured using all known state-of-the-art magnetic core materials, including but not limited to electrical grade steel laminations, ferrites & powdered iron, nickel-iron alloy, iron amorphous metal strip-wound cores, nanocrystalline cores, and small toroids.
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Antifungal and non-nutrient coatings are available
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Corrosion-resistant coatings & platings available
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Standard or custom terminations & leads
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Mounting Configurations: pcb-mount (horizontal or vertical), custom or standard bracket,s or stacked configurations
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Designed to meet CSA & UL (safety) or MIL PRF 27 (aerospace/military) requirements upon request
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MIL PRF 27 Grade 5 & 6 encapsulation available
FAQs for Power Transformer
What is the difference between an autotransformer and a traditional isolation transformer?
Unlike a conventional transformer, which has separate primary and secondary windings, an autotransformer utilizes a single winding with taps for both input and output. This makes it more compact, efficient, and cost-effective in some voltage conversion scenarios—but it does not provide galvanic isolation between input and output.
How do you design a custom power transformer for a specific application?
We start by gathering your electrical specs (input/output voltages, current, frequency, load profile) plus environmental constraints (temperature, mounting, insulation, shock/vibration). From there, we select appropriate core materials (laminated steel, powdered iron, etc.), winding configurations, insulation systems, and protective coatings. The design is then simulated, prototyped, and tested to ensure it meets your performance and safety needs.
What applications are step-down power transformers used for?
Yes. We offer step-up transformers (as well as step-down and autotransformers) that can raise voltage from a lower level to a higher one. The design must account for insulation, core flux, winding arrangements, and safety considerations to handle the higher stress associated with voltage boosting.
How does Electronic Craftsmen ensure quality and reliability in their transformers?
We apply superior quality assurance programs, precise in-house assembly, use advanced materials like electrical grade steel laminations and nanocrystalline cores, and back all units with a 5-year warranty to guarantee performance.
Can custom transformers be designed to step up voltage (i.e., from lower to higher)?
Yes. We offer step-up transformers (as well as step-down and autotransformers) that can raise voltage from a lower level to a higher one. The design must account for insulation, core flux, winding arrangements, and safety considerations to handle the higher stress associated with voltage boosting.