The 3-Phase Low Voltage Dry-Type Isolation Transformer provides complete electrical isolation between the power source and the load, making it an essential component for system protection and signal noise attenuation. Unlike autotransformers, our isolation transformers feature magnetically coupled but electrically isolated copper/aluminum windings, effectively breaking ground loops and protecting sensitive downstream equipment from high-voltage transients and grid pollution.

Integrated with high-grade copper electrostatic shielding (Faraday Shield), this transformer dramatically reduces electromagnetic interference (EMI) and common-mode noise. Manufactured strictly according to ISO9001 and CE standards, it is built for long-term continuous duty in demanding industrial and commercial environments.

100% Galvanic Isolation: Physically separates input and output circuits to prevent electric shocks, neutralize phase-to-ground faults, and eliminate unwanted circulation currents.

Superior Noise & Surge Attenuation: Equipped with an internal copper Faraday shield between windings to block high-frequency line noise, grid harmonics, and voltage surges.

Flexible Multi-Tap Customization: Tailored input/output voltage configurations (e.g., 380V/415V/480V to 200V/220V/380V) with optional dual or triple voltage taps.

High Insulation & Safety Design: Built with high dielectric strength materials (Class F or Class H insulation) to withstand extreme thermal stresses and short-circuit electrodynamic forces.

Low loss and quiet performance: The working sound level remains below 50dB while minimizing no-load energy loss to the greatest extent possible.

The weight and dimensions are for reference only, please refer to the actual situation.

Our 3-phase autotransformers are widely used across diverse industrial sectors requiring direct voltage adjustment:

Imported CNC Machinery: Lathes, milling machines, laser cutters, and machining centers.

Industrial Automation: SMT surface mount equipment, PCB manufacturing lines, and robotic arms.

Motor & Pump Drives: Step-down voltage starting for large AC induction motors, fans, and compressors.

Commercial Power Systems: HVAC systems, printing presses, and plastic injection molding machinery.

Q1: When should I choose an Autotransformer instead of an Isolation Transformer?

A: You should choose an Autotransformer if you simply need to convert line voltage (e.g., from 380V to 220V for imported machinery) and do not require complete electrical/galvanic isolation between the primary and secondary circuits. It is much more compact, highly efficient, and cost-effective.

Q2: Can this autotransformer be built into our existing control cabinet?

A: Yes, we supply open-type (IP00) autotransformers specifically designed for integration inside customer control panels, as well as standalone enclosed units (IP20/IP23) for floor mounting.

Q3: Do you support dual or multiple output voltages on a single autotransformer?

A: Absolutely. We can engineer multi-tap output terminals (for example, 380V input to both 220V and 200V outputs) according to your electrical schematics.