A single-phase transformer is a static electrical device that transfers electrical energy between two or more single-phase circuits through electromagnetic induction. It converts alternating current (AC) from one voltage level to another without changing the frequency, specifically designed for single-phase power systems.
As a key component in low-voltage power supply networks, single-phase transformers perform three core functions:
1.Step down high voltage (e.g., 10kV) to low voltage (e.g., 220V/110V) for residential and commercial use;
2.Isolate circuits to ensure operational safety for end-users;
3.Stabilize voltage output to protect sensitive electrical equipment from voltage fluctuations.
They are essential for scenarios where single-phase power is required, such as homes, offices, small factories, shops and off-grid renewable energy systems.
| Configuration Feature | Dry-Type Single-Phase Transformer | Oil-Immersed Single-Phase Transformer | Low-Voltage Single-Phase Transformer |
| Insulation & Cooling Medium | Epoxy Resin / Air | Mineral Oil / Natural Circulation | Resin / Air |
| Capacity Range | 0.5kVA-30kVA | 5kVA-50kVA+ | 0.5kVA-5kVA |
| Fire Safety Rating | Excellent (non-combustible) | General (risk of oil combustion) | Excellent |
| Installation Environment | Indoor | Outdoor / Indoor (large space) | Indoor |
| Maintenance Cost | Very Low (no oil maintenance) | Low (sealed model) | Very Low |
| Initial Cost | High | Low | Medium |
| Weight | Light (5-30kg) | Medium (20-80kg) | Very Light (1-5kg) |
Buying Suggestion: Prioritize application scenario (indoor/outdoor) → capacity requirement → safety standards → budget. For residential/indoor projects, choose dry-type; for outdoor/large-capacity needs, opt for oil-immersed; for electronic equipment, select low-voltage models. Contact our engineers for free project-specific recommendations.
The core difference is insulation and cooling medium. Dry-type models use epoxy resin and air cooling (fire-safe, indoor use), while oil-immersed models use mineral oil and natural circulation (low cost, outdoor use). Choose dry-type for residential/indoor projects; oil-immersed for outdoor/large-capacity needs.
Yes! We fully support customization for capacity (0.5kVA-50kVA+), input/output voltage (e.g., 10kV/220V, 220V/110V, 380V/24V) and other specifications. We can also design transformers to comply with local standards (IEC, IEEE, ANSI, GB, etc.). Just provide your project details when inquiring.
For standard models (0.5kVA-30kVA dry-type/oil-immersed), the delivery time is 20–30 working days. For customized models or large-capacity (30kVA-50kVA) transformers, it’s 30–40 working days. Urgent orders (minimum 15 working days for standard models) are supported with priority production.
All our products comply with international standards such as IEC 60076, IEEE C57.12.00 and hold certifications including ISO 9001, CE, UL and CB. We provide complete certification documents and test reports to ensure compliance with local inspection requirements. Our transformers have passed inspections in over 40 countries.
We implement strict quality control throughout the production process:
1.Raw material inspection: All cores, windings and accessories are sourced from certified suppliers and tested before production;
2.Process monitoring: Key processes (winding, core assembly, insulation treatment) are supervised by professional technicians;
3.Finished product testing: Each transformer undergoes no-load loss testing, short-circuit testing, insulation testing and temperature rise testing;
4.Factory inspection: Clients are welcome to visit the factory for pre-shipment inspection (we provide free pick-up and accommodation for large orders).
