Three Phase Isolation Transformer

Three Phase Isolation Transformer (called isolation transformer for short). It is applicable for voltage transformation, circuit isolation and stable power supply in the 63KV/66KV/69KV three-phase AC 50Hz power system, and is widely used in industrial production, urban power grids and key infrastructure projects requiring isolated power supply. It has the functions of voltage conversion, electrical isolation, interference suppression and overload protection for the power grid.

The Three Phase Isolation Transformer is engineered with safety, efficiency, and reliability as core pillars, targeting industrial, commercial, and critical infrastructure applications that demand stable power isolation. The design adheres to international standards (e.g., IEC 60076, ANSI C57.12.00) and emphasizes electrical isolation to eliminate ground loops, suppress voltage spikes, and protect sensitive equipment from grid disturbances. The transformer's three-phase configuration is optimized for balanced load distribution, ensuring minimal energy loss and consistent performance across 380V/400V/415V nominal voltage ratings (customizable for specific regional requirements). Thermal management is integrated into the design from the outset, with heat dissipation pathways calibrated to handle continuous operating temperatures up to 155°C, extending service life and reducing downtime.

The transformer features a robust, modular structure composed of four primary assemblies. The magnetic core is constructed from high-grade cold-rolled silicon steel laminations (CRGO), stacked in a stepped-lap configuration to minimize eddy current losses and enhance magnetic flux density. Winding systems employ Class H insulated copper windings (or aluminum as an economic alternative), precision-wound with a double-layer distribution to ensure uniform voltage distribution and withstand short-circuit forces. The tank and enclosure are fabricated from corrosion-resistant steel (or stainless steel for harsh environments), with a sealed design to prevent dust, moisture, and chemical ingress-critical for outdoor or industrial settings. Supplementary components include vacuum-impregnated insulation (for enhanced dielectric strength), temperature sensors (PT100) for real-time monitoring, and surge arresters to safeguard against transient overvoltages.

To maximize operational stability and adaptability, the transformer's structure incorporates several advanced design features. The core and windings are rigidly clamped using epoxy resin-bonded supports, reducing vibration and acoustic noise (typically ≤65dB at 1m) for noise-sensitive environments. The winding-to-core and winding-to-winding insulation gaps are precisely calibrated usingNomex or pressboard barriers, ensuring optimal dielectric isolation while minimizing overall size. For ease of installation and maintenance, the transformer is equipped with lifting lugs, accessible terminal boxes, and a drainage system to remove condensation. Additionally, the modular design allows for customization of capacity (1kVA to 2000kVA), winding connections (Delta/Star), and mounting options (floor-standing or wall-mounted), making it compatible with diverse power system architectures.

We're happy to customize items to match your requests. Feel free to contact us for details.