Victron Energy 120/240VAC-50A Autotransformer - ITR000100052

Autotransformer 120/240VAC-50A is a highly efficient autotransformer manufactured by Victron Energy, designed for step-up and step-down voltage applications, as well as precise split-phase output balancing. The utilization of a toroidal architecture ensures minimal operating noise, reduced weight, and superior reliability within modern power systems.

The Autotransformer 50A model serves as an ideal solution for eliminating load imbalance issues when operating on split-phase grids, generators, or inverters. This allows for full utilization of the power source's rated capacity without the risk of overloading individual lines.

Key Advantages of Autotransformer 120/240VAC-50A

• Split-Phase Balancing — The autotransformer effectively equalizes currents between 120V lines, dynamically compensating for uneven load distribution.
• Versatile Applications — The device can be utilized as a step-up transformer (from 120V to 240V), a step-down transformer, or a central balancing node.
• Integrated Ground Relay — Automatically connects the neutral to the ground when the paired inverter (MultiPlus or Quattro) switches to island/off-grid mode, ensuring the correct operation of residual current devices (RCD / GFCI).
• Reliable Thermal Protection — An integrated temperature sensor automatically disconnects the device from the power supply in the event of critical overheating, preventing hazardous conditions (protection reset is performed manually).
• Toroidal Design — The implementation of advanced winding technologies minimizes acoustic noise and optimizes the unit's overall weight.
• Integrated Circuit Breaker — A 50A two-pole protective circuit breaker provides comprehensive safeguard for the input circuits.

Technological Features

Eliminating Split-Phase Load Imbalance

• In 120/240V split-phase systems, connecting asymmetrical 120V loads inevitably causes a current discrepancy between the phase lines. This leads to premature overloading of a single line, effectively reducing the usable limit of the power source to ~67% of its rated capacity.
• By integrating the autotransformer, the source's original neutral line can remain unutilized: the device establishes a new stable neutral point, and the resulting current imbalance closes through its windings, evenly distributing the load on the source up to 100% of its capacity.

Joint Operation with Multi and Quattro Inverter Systems

• To comply with safety standards, the neutral wire must be bonded to the ground circuit during inverter generation mode.
• The autotransformer's internal ground relay is directly controlled by 230/240V Multi or Quattro inverter-chargers, automating the commutation process.

An Effective Alternative to Stacked Inverters

• Instead of installing two synchronized 120V inverters, it is often more cost-effective and practical to use a single powerful 240V inverter paired with an autotransformer.
• This configuration provides significantly greater flexibility, rerouting unused power from one line to the other during peak consumer demands.

Usage Scenarios

• Adaptation of US-standard onboard power grids (120/240V) on yachts, boats, and specialized vehicles (campervans, RVs).
• Phase current equalization and phase imbalance protection when operating two-pole 120/240V split-phase generators.
• Voltage step-up from 120VAC to 240VAC to supply high-power equipment.
• Balancing of systems built on cascaded Victron Energy inverter configurations.

Technical Specifications

Why Buy from Total-Energo

LLC "Total-Energo" is an official distributor of Victron Energy products in Ukraine. We provide authentic equipment supplies, expert consultations from certified specialists, and comprehensive warranty and post-warranty support.