2025-08-12
Purchasing a transformer requires careful planning to ensure you get the right equipment for your application. Purchase transformers and get parameter consultation from our company. We are the original manufacturer in China.
1. Define Your Requirements
- Type of Transformer:
- Power Transformer: For electrical grids, substations (high voltage, e.g., 11kV+).
- Distribution Transformer: Local power distribution (e.g., 415V/240V).
- Isolation Transformer: Safety/noise reduction (1:1 ratio).
- Autotransformer: Variable voltage (e.g., Variac).
- Instrument Transformer: CT/PT for metering/protection.
- Specialty: Audio, medical, or solar inverters.
- Electrical Specs:
- Input Voltage (e.g., 480V AC).
- Output Voltage (e.g., 120V AC).
- Phase: Single-phase or three-phase.
- Frequency (e.g., 60Hz in North America, 50Hz in EU).
- kVA Rating: Calculate as Load (kW) ÷ Power Factor (typically 0.8–0.95).
- Environment:
- Indoor/outdoor use, temperature, humidity, hazardous areas.
- Certifications: UL/CSA (North America), CE (EU), IEC, or local standards.
2. Choose Core & Cooling Type
- Core: Laminated iron (most common), ferrite (high-frequency), or toroidal (compact/low noise).
- Cooling:
- Dry-type (air-cooled, safe indoors).
- Oil-filled (for high power, outdoors/fireproof rooms).
3. Vendor Selection
- Manufacturers: ABB, Siemens, Schneider Electric, Eaton (industrial); Hammond, Triad (commercial).
- Distributors: Graybar, Rexel, or online platforms (Digi-Key, Mouser for small units).
- Custom Builders: For unique specs (e.g., high isolation, special impedance).
4. Request Quotes & Evaluate
- Provide detailed specs to vendors.
- Compare:
- Price (new vs. refurbished).
- Efficiency: Look for DOE 2016 (US) or EU Tier standards.
- Warranty (typically 1–5 years).
- Lead Time: Standard (weeks) vs. custom (months).
5. Logistics & Installation
- Shipping: Heavy units may require freight.
- Installation: Hire licensed electricians. Ensure:
- Proper grounding.
- Adequate ventilation (dry-type).
- Oil containment (oil-filled).
- Compliance: Local electrical codes (e.g., NEC in US).
6. Budget Considerations
- Small Transformers (≤5kVA): $100–$500.
- Medium (5–75kVA): $1,000–$5,000.
- Large (100kVA+): $10,000–$100,000+.
| Parameter | Common Options |
|---|---|
| Type | Power, Distribution, Isolation, Autotransformer |
| Phase | Single-phase, Three-phase |
| Cooling | Dry-type, Oil-immersed |
| Certifications | UL, CE, IEC, IEEE C57.12.xx |
| Key Specs | kVA, Primary/Secondary Voltage, Frequency |
