Best 208 to 380 Volt Transformer Options for Industrial and Hobby Use
Choosing the right transformer to convert 208V to 380V (or to are designed for 380V service) depends on capacity, efficiency, and installation requirements. The following selections focus on 208V to 380V or 380V-centric transformers suitable for CNC machines, HVAC, and industrial automation. Each entry includes a quick overview, key specs, and how it fits common power systems in the American market.
| Product | Voltage Range | Power | Type |
|---|---|---|---|
| WTTTOOLS 10KW Transformer | 220V to 380V | 10 kW | 3-Phase Isolation/Step-Up |
| RCTCBRZVTW 380V to 380V (10 KVA) | 380V to 380V | 10 KVA | Isolation Transformer |
| RCTCBRZVTW 1000VA 380V to 220V/208V | 380V to 220/208/415/480/690V | 1 KVA | Isolation Transformer |
| GoHz 10 kVA 3-Phase | 120–480V | 10 kVA | Dry Type Isolation |
| GoHz 4 kVA 3-Phase | 120–480V | 4 kVA | Dry Type Isolation |
| NZMWLNSGAW 10 kVA VF Transformer | 380V to 220V (50/60Hz) | 10 kVA | Variable Frequency/Voltage |
| GoHz 20 kVA 3-Phase | 120–480V | 20 kVA | Dry Type Isolation |
| Larson Electronics 1-Phase Buck/Boost | 208V to 240V | Varies | Step-Up Transformer |
WTTTOOLS 10KW Transformer 3-Phase 220V to 380V
The 10 kW WTTTOOLS transformer provides three-phase capacity to convert 220V input into 380V output. It is described as safe, stable, and efficient with an electronic display for intuitive operation. The unit weighs about 50 kg and measures 470 mm by 370 mm by 360 mm, making it suitable for workshop or light industrial use where 380V service is required from a 220V source.
RCTCBRZVTW 380V to 380V Isolation Transformer (10 KVA)
This 10 KVA isolation transformer maintains 380V to 380V power, emphasizing long-term stability and straightforward maintenance. It is designed for easy installation and reliable operation in three-phase systems where isolation is important to protect downstream equipment from noise and transients. Suitable for industrial lines requiring robust isolation with 380V on both sides.
RCTCBRZVTW 1000VA 380V to 220/208/415/480/690V Transformer
Offering 1 KVA, this all-aluminum dry-type transformer converts 380V for versatility across various voltages including 220V, 208V, 415V, 480V, and 690V. It emphasizes easy maintenance with a simple operation model and is suitable for smaller equipment or pilot setups where 380V inputs must be adapted to other common industrial voltages.
GoHz 10 kVA 3-Phase Isolation Transformer
GoHz’s 10 kVA three-phase isolation transformer is designed for industrial settings requiring stable 3-phase power. It supports a broad primary/secondary voltage range (120–480V optional) with copper winding and dry-type cooling. The design emphasizes efficiency and reliability for CNC machines, HVAC systems, and automation lines, delivering clean power with reduced noise and transients.
GoHz 4 kVA 3-Phase Isolation Transformer
This 4 kVA GoHz model is a compact option for step-up/step-down needs in commercial power systems. It uses dry-type construction with copper winding and H-class insulation for durability. It supports stable 3-phase conversions and is suitable for mid-scale equipment requiring reliable voltage transformation from 380V to 208V or 220V depending on configuration.
NZMWLNSGAW 10 kVA Variable Frequency Transformer
This 10 kVA unit offers adjustable voltage and frequency (380V to 220V, 50/60 Hz) for industrial automation needs. It provides flexibility across regional power standards, making it useful when equipment must operate under different frequencies or voltages. The model is marketed with a warranty, emphasizing reliability for extended use in warehouses or manufacturing settings.
GoHz 20 kVA 3-Phase Isolation Transformer
Designed for substantial industrial loads, this 20 kVA GoHz transformer provides robust three-phase isolation with a dry-type copper winding. It supports a wide voltage window and is suited for CNCs, HVAC systems, and automated lines needing high-power, stable 3-phase power with minimal distortion and noise, while maintaining efficiency through high-grade insulation and silicon steel cores.
Larson Electronics 1-Phase Buck/Boost Transformer (208V to 240V)
This unit provides a single-phase option to step 208V up to 240V for electrical loads up to 23.4A. It is intended for fast, localized voltage adjustments in settings where 208V is the supply and 240V is needed. Note that transformers are often marked non-returnable for safety and compliance reasons after shipment; be sure the unit fits your load requirements.
Buying Guide: Key Considerations for 208V to 380V Transformations
When selecting a transformer for converting 208V to 380V or working with 380V-capable equipment, consider these factors to ensure safe, reliable operation:
- Power rating and load indicate whether the transformer can handle peak and continuous demands. Match the KVA/kW rating to your equipment’s startup and running current.
- Phase configuration matters. Three-phase transformers are typically used in industrial settings and provide better power quality for motors and CNC machines, but single-phase units are common for smaller loads.
- Voltage range and taps: Check primary and secondary voltage ranges and whether adjustable taps are available for fine-tuning under load.
- Isolation versus non-isolation: Isolation transformers protect against noise and transients. If safety isolation is not required, a standard step-up/down unit may suffice.
- Cooling method: Dry-type transformers are common in indoor environments and offer lower maintenance; oil-filled units are for heavier, outdoor-duty applications but require containment and ventilation considerations.
- Winding material: Copper windings generally provide better efficiency and durability than aluminum, albeit at a higher initial cost.
- Efficiency and thermal performance: Look for low-loss cores and insulation ratings (H-class or better) to minimize heat and energy waste.
- Physical footprint and installation: Verify dimensions and weight to ensure feasible mounting and service access in your facility.
- Warranty and serviceability: A manufacturer’s warranty and local support influence long-term ownership costs and downtime risk.
- Installation compliance: Ensure the unit meets applicable electrical codes and safety standards for your state and industry.
To maximize reliability, assess how each model handles startup surges, transient suppression, and the nature of loads connected to the transformer. For equipment with highly variable loads, consider transformers with good regulation and ventilation to maintain stable voltages without overheating.
Users should verify that the equipment matches regional power standards (U.S. 3-phase 208V or 480V systems, depending on facility) and consult a qualified electrician prior to installation. The right transformer improves performance, reduces wear on motors, and protects sensitive devices from voltage fluctuations.