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Autotransformer 120/240V-100A

The Victron Autotransformer 120 V/240 V−100 A is a versatile power management device for step up, step down, and crucially, for balancing unbalanced loads in split phase systems (e.g., 120 V/240 V generators or stacked inverters).

Voltage Versatility: Functions for 120 V to 240 V step up, 240 V to 120 V step down. Split Phase Balancing: Manages unbalanced loads on 120 V/240 V supplies to unlock full power potential. Integrated Ground Relay: Includes a ground relay for safe neutral-to-earth bonding with Victron Multi/Quattro Inverter/Chargers. High Power Rating: Maximum 240 V feed through current of 100 A with a two-pole circuit breaker. Safety Protection: Features both over current protection and thermal protection with manual reset.
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SKU: ITR000100101
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Product Details

Maximise your power system’s efficiency and flexibility with the Victron Autotransformer 120/240V-100A. This robust unit is an essential component for installations requiring versatile voltage management, capable of three primary functions: step up, step down, and split phase output balancing.

When dealing with a 120 V/240 V split phase supply from the grid, a generator, or stacked inverters, unbalanced loads can prevent you from utilising the full available power. The 100 A Autotransformer solves this by absorbing the current difference (up to 28 A continuous), ensuring that a heavy load on one 120 V leg does not limit the total power output. It also offers a streamlined alternative to stacking multiple 120 V inverters for a split phase supply.

For enhanced safety and seamless integration, the unit includes a ground relay for use with Victron MultiPlus or Quattro Inverter/Chargers, ensuring the neutral output is correctly grounded in inverter mode. Built with a highly efficient toroidal transformer and housed in a durable aluminium enclosure, this 100 A Autotransformer provides reliable, temperature-protected power conversion for professional marine, off-grid, and RV systems.

Product Specifications

Technical Specifications

Combined for SKUs: ITR000100101

Ac Input Voltage: 120 VAC

Ac Output Voltage: 240 VAC

Depth: 110 mm

Frequency: [50, 60] Hz

Height: 425 mm

Input Circuit Breaker: 100A, Two Pole

Material: Aluminium

Max ACFeed Current240VAC: 100 A

Neutral Current Cont: 28 A

Neutral Current30m: 32 A

Neutral Power Rating30m: 3,800 VA

Protection Category: IP21

Safety: EN 60076

Transformer Type: Toroidal

Weight: 13.5 kg

Width: 214 mm

Source: Victron


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