Industry-Verified Manufacturing Data (2026)

Transformer

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Transformer used in the Electrical Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Transformer is characterized by the integration of Core and Primary Winding. In industrial production environments, manufacturers listed on CNFX commonly emphasize Silicon Steel (for the core) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An electromagnetic device that transfers electrical energy between circuits through electromagnetic induction, typically used to change voltage levels.

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Product Specifications

Technical details and manufacturing context for Transformer

Definition
Within a Power Supply Unit (PSU), the transformer is a critical component responsible for converting the input AC voltage (e.g., 120V or 230V) to a different, typically lower, AC voltage suitable for the PSU's internal circuitry. It provides electrical isolation between the primary (input) and secondary (output) circuits, enhancing safety and enabling voltage transformation.
Working Principle
Operates on the principle of electromagnetic induction. An alternating current in the primary winding creates a varying magnetic flux in the transformer's core. This varying flux induces a voltage in the secondary winding. The ratio of the number of turns in the primary and secondary windings determines the voltage transformation ratio (V_secondary / V_primary ≈ N_secondary / N_primary).
Common Materials
Silicon Steel (for the core), Copper (for the windings), Insulating Materials (e.g., varnish, paper, plastic)
Technical Parameters
  • Rated power capacity, indicating the maximum load the transformer can handle continuously without overheating. (VA or W) Customizable
Components / BOM
  • Core
    Provides a low-reluctance path for the magnetic flux, typically made of laminated silicon steel to reduce eddy current losses.
    Material: Silicon Steel
  • Primary Winding
    The coil connected to the input power source, where the alternating current creates the initial magnetic flux.
    Material: Copper
  • Secondary Winding
    The coil where the output voltage is induced via the changing magnetic flux from the primary.
    Material: Copper
  • Insulation
    Electrically isolates the windings from each other and from the core to prevent short circuits and ensure safety.
    Material: Insulating Varnish/Paper/Plastic
  • Bobbin
    A frame or spool that holds and organizes the windings, providing structural support and aiding in winding placement.
    Material: Plastic (e.g., PET, PBT)
Engineering Reasoning
0.95-1.05 per unit voltage ratio, 85-150°C winding temperature, 0-100% load current
Insulation breakdown at 25 kV/mm electric field strength, core saturation at 1.8 T magnetic flux density, 180°C winding hotspot temperature
Design Rationale: Dielectric breakdown of insulation paper at >25 kV/mm field strength, magnetic core saturation beyond 1.8 T flux density causing excessive eddy currents, thermal degradation of cellulose insulation above 180°C
Risk Mitigation (FMEA)
Trigger Lightning surge exceeding 100 kV impulse withstand voltage
Mode: Inter-turn insulation puncture causing short-circuit currents >10× rated current
Strategy: BIL-rated insulation design with 150 kV basic impulse level, coordinated surge arresters with 10 kA discharge capacity
Trigger Continuous overload at 130% rated current for >4 hours
Mode: Winding hotspot temperature exceeding 180°C causing insulation pyrolysis
Strategy: ANSI/IEEE C57.91 thermal modeling with fiber optic temperature sensors, forced oil circulation at 0.3 m/s flow velocity

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Transformer.

industrial power transformer for manufacturing electromagnetic induction voltage converter silicon steel core transformer components copper winding electrical transformer custom transformer for equipment manufacturing

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Power Supply Unit
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Welding Power Supplies
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Power Supply
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Rectifier Circuit
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Isolated Power Supply
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Power Supply Unit (PSU)
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Power Supply Section
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar (typical), up to 10 bar for sealed units
other spec: Frequency: 50/60 Hz (standard), up to 400 Hz for special designs; Humidity: 0-95% non-condensing
temperature: -40°C to 150°C (ambient), 80°C to 180°C (winding hot spot)
Media Compatibility
✓ Mineral oil insulation ✓ Dry air (nitrogen) environment ✓ Silicone-based cooling fluids
Unsuitable: Chlorinated hydrocarbon vapors (cause insulation degradation)
Sizing Data Required
  • Required power rating (kVA/MVA)
  • Primary and secondary voltage levels (kV)
  • Load profile (continuous/intermittent) and power factor

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Insulation degradation
Cause: Thermal aging from overloading, moisture ingress, or contamination reducing dielectric strength
Winding failure
Cause: Mechanical stress from through-fault currents, thermal cycling, or loose connections leading to short circuits
Maintenance Indicators
  • Abnormal audible humming or gurgling sounds indicating internal arcing or oil breakdown
  • Visible oil leaks or discoloration in insulating oil suggesting overheating or contamination
Engineering Tips
  • Implement regular dissolved gas analysis (DGA) to detect incipient faults in oil-filled transformers before catastrophic failure
  • Maintain proper cooling system operation and ensure clean, dry breathers to prevent moisture ingress and thermal stress

Compliance & Manufacturing Standards

Reference Standards
IEC 60076 (Power Transformers) ISO 9001 (Quality Management Systems) IEEE C57.12.00 (General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers)
Manufacturing Precision
  • Winding Resistance: +/- 2% of calculated value
  • Insulation Resistance: Minimum 1000 MΩ at 20°C
Quality Inspection
  • Impulse Withstand Voltage Test
  • Dissolved Gas Analysis (DGA) in Oil

Factories Producing Transformer

Verified manufacturers with capability to produce this product in China

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✓ 97% Supplier Capability Match Found

T Technical Director from Canada Jan 30, 2026
★★★★★
"Reliable performance in harsh Electrical Equipment Manufacturing environments. No issues with the Transformer so far."
Technical Specifications Verified
P Project Engineer from United States Jan 27, 2026
★★★★☆
"Testing the Transformer now; the technical reliability results are within 1% of the laboratory datasheet. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from United Arab Emirates Jan 24, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

8 sourcing managers are analyzing this specification now. Last inquiry for Transformer from Poland (26m ago).

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Frequently Asked Questions

What are the main advantages of silicon steel cores in transformers?

Silicon steel cores provide high magnetic permeability and low hysteresis loss, improving transformer efficiency by reducing energy dissipation as heat during electromagnetic induction.

How do transformer windings affect voltage conversion?

The ratio between primary and secondary winding turns determines voltage conversion. More turns on the secondary winding increases voltage (step-up), while fewer turns decreases voltage (step-down) proportionally.

What insulation materials are recommended for industrial transformers?

Industrial transformers typically use varnish-impregnated paper, epoxy resin, or high-temperature plastics for insulation, providing dielectric strength and thermal stability for safe operation in manufacturing environments.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Electrical Equipment Manufacturing sector.

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