Three Phase Transformers

This custom three-phase autotransformer, built to customer specifications in a WYE configuration, features a 400/480V primary and a 208V secondary. Each coil includes 105°C and 120°C resettable thermal fuses within the windings. Primary and secondary leads are crimped with ferrules and aligned for Din Rail terminal blocks.

Lenco Electronics specializes in custom design of 3 phase isolation and 3 phase autotransformers up to 75KVA.

Custom 7VA 3 phase isolation transformer with single WYE conected 50Hz primary and single WYE connected secondary of the same voltage.

Lenco Electronics specializes in custom design of 3 phase isolation transformers and 3 phase autotransformers up to 75KVA.

Custom 3 Phase Step Down Autotransformer: Modern Solutions for Safe Voltage Conversion

Enhanced Safety, Clean Installation, and Reliable Power for Today’s Electrical Systems

Overview

Transforming voltage reliably is a cornerstone of safe and efficient industrial and commercial power distribution. The custom 3 phase step down autotransformer provides a sophisticated means to convert a 480V line-to-line supply at 50/60Hz down to 400V line-to-line output, perfectly suiting the needs of facilities operating a diverse array of global equipment. Designed for both performance and protection, this transformer stands out with features that prioritize user safety and ease of installation.

Efficient Voltage Transformation

Tailored for environments where European-standard machinery must be powered from a North American grid, this autotransformer ensures a smooth and balanced transition from 480V to 400V. Its robust three-phase design guarantees that voltage is stepped down consistently, minimizing losses and ensuring equipment receives the power it requires. The transformer’s reliability makes it the ideal choice for factories, commercial complexes, and any application where precision and stability are non-negotiable.

Comprehensive Thermal Protection for Each Phase

At the heart of the transformer’s safety measures are two re-settable thermal switches on each phase. These intelligent devices monitor temperature fluctuations and act swiftly to disconnect power in the event of overheating, guarding against overloads or faults. The dual-switch arrangement means that every phase benefits from independent, redundant thermal oversight, massively reducing the risk of equipment damage and ensuring that the transformer can be safely reset and returned to service when conditions improve.

Touchless Through Terminals: Safety Meets Aesthetics

Installation is streamlined by the transformer’s touchless 2 conductor through terminals. These terminals are designed to allow wiring without direct contact with conductive elements, dramatically reducing installation hazards and presenting a tidy, uncluttered finish. Such attention to detail not only enhances safety for electrical workers but also contributes to a professional, organized look within any power distribution cabinet or panel.

Typical Uses and Versatility

Manufacturing Facilities: Enables operation of European machines requiring 400V from a North American supply.

Commercial Buildings: Ideal for converting supply voltages for lighting, elevators, and HVAC controls.

IT and Data Infrastructure: Protects sensitive electronics by delivering the correct voltage with minimal risk.

Green Energy Installations: Integrates with solar and renewable setups that need precise voltage control.

Final Thoughts

This custom autotransformer combines advanced voltage conversion capabilities with robust thermal safeguards and intuitive, touchless terminals for safe, clean installation. Facilities seeking dependable power management, enhanced safety, and sleek installation options will find this solution meets the needs of modern electrical systems with distinction.

Custom 3 phase step down autotransformers don't have to be over complicated with additional terminals that drive up the cost. This simple 3 phase autotransformer with flying leads is rated for 6KVA total power that converts 575V 60Hz to 460V and is constructed to our UL class B insulation system.

Lenco Electronics specializes in custom design of 3 phase isolation transformers and 3 phase autotransformers up to 75KVA.