How to Choose the Right Transformer Based on Actual Needs

### How to Choose the Right Transformer Based on Actual Needs

Transformers are critical components for power transmission and equipment operation. Selecting a suitable model requires aligning with electrical requirements, application scenarios, and international standards. Follow this step-by-step guide to make an informed decision:

#### 1. Clarify Core Electrical Parameters (Fundamental Requirements)

- **Voltage Compatibility**: Confirm the input voltage (primary voltage, e.g., 10kV grid power, 220V household power) and output voltage (secondary voltage, e.g., 380V for industrial machinery, 12V for electronic devices). Ensure full matching with your target market’s power grid standards (e.g., 110V/60Hz for North America, 230V/50Hz for Europe).

- **Rated Capacity**: Calculate total load power and add a 10%-20% margin to avoid overload. For example, if the total load is 80kW, select a 100kVA transformer. Overcapacity wastes resources, while insufficient capacity risks equipment damage.

- **Frequency Adaptation**: 50Hz is standard in most Asian/European countries, while 60Hz is used in North America/Japan. Mismatched frequency will cause equipment malfunction.

#### 2. Match Application Scenarios with Transformer Types

| Application Scenario | Recommended Transformer Type | Key Advantages |

|----------------------|-------------------------------|----------------|

| Power Transmission (Outdoor/Factory) | Oil-immersed Transformer | Large capacity, efficient heat dissipation, cost-effective for high-voltage long-distance transmission |

| Indoor/High-rise Buildings | Dry-type Transformer | Fireproof, explosion-proof, low noise, suitable for enclosed spaces |

| Electronic Devices (Appliances/Instruments) | High-frequency Switching Transformer | Compact size, high efficiency, stable output for precision equipment |

| Special Industries (Medical/Chemical) | Isolation Transformer | Electrical insulation, anti-shock protection, corrosion-resistant (for harsh environments) |

| Voltage Regulation Needs | On-load Tap-changing Transformer | Adjustable output voltage without power interruption |

| Multiple Voltage Requirements | Multi-winding Transformer | Supports simultaneous output of multiple voltages (e.g., 220V/380V) |

#### 3. Adapt to Environmental Operating Conditions

- **Temperature**: For high-temperature environments (e.g., steel mills), choose transformers with H-class high-temperature resistant insulation materials. For low-temperature areas, ensure oil-immersed transformers use anti-freezing oil.

- **Humidity/Altitude**: In humid regions, select sealed transformers with IP54+ protection rating. For high-altitude areas (above 1000 meters), opt for plateau-type transformers with enhanced insulation strength to prevent electrical discharge.

- **Installation Space**: Dry-type transformers are ideal for limited indoor spaces (compact design), while oil-immersed transformers suit open outdoor areas. Reserve at least 30cm of ventilation space around the transformer.

#### 4. Confirm Key Additional Requirements

- **Efficiency & Energy Consumption**: Prioritize Class 1 energy-efficient transformers (e.g., SBH15 series) for long-term operation to reduce electricity costs. For short-term or intermittent use, Class 2 efficiency can be considered.

- **International Certifications**: Ensure compliance with target market standards, such as CE (Europe), UL (North America), ISO, and GB (China). Certified products enhance market acceptance and avoid customs barriers.

- **Maintenance & Safety**: For unmanned scenarios, choose maintenance-free sealed transformers. For frequent inspection needs, select models with simple structures and easy access to components. For hazardous areas, confirm explosion-proof certifications (e.g., Ex d IIB T4).

#### 5. Notes for Cross-border Trade

- Confirm voltage/frequency standards of the destination country to avoid compatibility issues.

- Check transportation restrictions: Oil-immersed transformers require special packaging for leak prevention; dry-type transformers are easier for international shipping.

- Clarify after-sales service needs: Select suppliers offering technical support and spare parts supply for overseas maintenance.