Mastervolt Isolationstransformator Mass GI 3.5
Mastervolt · Isolation Transformers
Isolation Transformer Mass GI 3.5
The Mastervolt Mass GI 3.5 isolation transformer is a 3,500 VA isolation transformer that galvanically separates yachts from the shore power grid, preventing electrolytic corrosion on metal parts in the water, while keeping the on-board electrical system grounded. It operates on shore power grids from 90–255 V and 45–65 Hz and can be paralleled with up to four units for higher power requirements.
- Master bus compatible
- for professional use
In detail. Isolation Transformer Mass GI 3.5.
Advantages at a glance
- Protects hull, shaft system, and other metal parts from galvanic corrosion caused by stray currents from the shore power grid.
- Modern high-frequency transformer technology: lightweight (6 kg) and significantly more compact than classic 50 Hz isolation transformers of the same power.
- Works on various shore power grids worldwide (90–255 V, 45–65 Hz) without manual switching.
- Low no-load consumption of only 22 W saves on electricity bills at the berth.
- Expandable to a total output of up to 14 kW by paralleling up to 4 units.
When connecting to shore power, small stray currents often flow through the grounding wire between neighboring boats – without galvanic isolation, this can lead to accelerated corrosion of anodes, shaft systems, and other metal parts underwater. The Mass GI 3.5 interrupts this conductive path through an isolation transformer without canceling the safety-relevant grounding of the on-board electrical system. Thanks to its high-frequency design, it is significantly lighter and more compact than a classic isolation transformer of the same power and can be installed in almost any location on the ship.
As a Mastervolt System Partner, philippi supplies the Mass GI 3.5 isolation transformer for new build and refit projects and advises on whether one or more paralleled units are suitable for the planned shore power requirements. The Mass GI 3.5 is MasterBus compatible and can thus be integrated into Mastervolt's own monitoring network.
Compatibility
- MasterBus compatible for integration into the Mastervolt monitoring network.
- Parallel connection of multiple Mass GI 3.5 units for increased power (up to 4 units / 14 kW).
- Direct integration into the philippi P-Bus system is currently not documented for the Mass GI 3.5.
Technical data
| SKU | M88000355 |
|---|---|
| Input rated current (230 V) | 16 A |
| Power | 3,500 VA (230 V) / 1,920 VA (120 V) |
| Voltage range input/output | 90–255 V |
| Frequency range | 45–65 Hz |
| Efficiency | > 93 % |
| No-load consumption | 22 W |
| Protection class | IP23 |
| Operating temperature | 0–40 °C (derating above this) |
| Parallel operation | up to 4 units (max. 14 kW) |
| Weight | 6 kg |
| Dimensions (H x W x D) | 340 x 261 x 144 mm |
| Communication | MasterBus compatible |
| Certification | CE, ABYC |
Manufacturer and product safety
Navico Group EMEA B.V. (Marke Mastervolt)
Snijdersbergweg 93
1105 AN Amsterdam
Niederlande
info.emea@OneASG.com
Safety information: see the operating manual and data sheet.
Frequently asked questions. Answered briefly.
Why do I need an isolation transformer like the Mass GI 3.5?
It galvanically separates the on-board electrical system from the shore power grid, thereby preventing electrolytic corrosion on metal parts underwater, while the boat remains safely grounded.
Does the Mass GI 3.5 work on shore power grids abroad?
Yes, it operates automatically in a voltage range of 90–255 V and a frequency range of 45–65 Hz.
Can I combine multiple Mass GI 3.5 units if 3,500 VA is not enough?
Yes, up to four units can be paralleled to provide a total of up to 14 kW of power.
Can the Mass GI 3.5 be integrated into a Mastervolt monitoring system?
Yes, the Mass GI 3.5 is MasterBus compatible.
Goes well with it. Accessories and add-ons.
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