Transformator de izolare Mastervolt Mass GI 7,0 kW

The Mass GI 7.0kW provides complete galvanic isolation between the shore power supply and the boat's AC system. This isolation is essential to prevent galvanic corrosion that attacks metal parts of the hull (propellers, shafts, through-hulls) when the boat is connected to the shore ground.

Unlike traditional toroidal transformers, which are heavy and bulky, high-frequency switching technology enables an extremely compact and lightweight device. The Mass GI 7.0kW weighs just 10 kg while delivering an impressive 7000 VA.

This isolation transformer was designed to fit easily into confined spaces. It weighs 10 kg and its overall dimensions are approximately 340 x 261 x 250 mm.

No, the Mass GI 7.0kW does not convert voltage or frequency. The output voltage and frequency will match the input (with a ± 5% voltage tolerance). It acts purely as a galvanic isolator.

Yes, absolutely. The device accepts a very wide input voltage range from 90 to 255 V and a frequency of 45 to 65 Hz. It is therefore fully compatible with North American power grids (110V/60Hz) as well as European grids (230V/50Hz).

Energy efficiency is one of the strong points of this model. Its no-load consumption (when no device is drawing power on board) is extremely limited, at just 44 W.

The Mass GI 7.0kW is equipped with multiple electronic protections to ensure onboard safety:

Overload protectionPeak current limitationShort-circuit protectionThermal protection (automatic shutdown if heatsink reaches 90°C)

For the Mass GI 7.0kW model, which handles alternating current up to 32A, it is recommended to use AC cables with a minimum cross-section of 10 mm² (AWG 8) to ensure a safe and loss-free installation.

Yes, it is recommended and mandatory according to marine electrical standards. You must install a dedicated double-pole circuit breaker as well as a 30mA residual current device (GFCI/RCD) paired with a 32A fuse at the input and output of the device.

The Mass GI 7.0kW has native connectivity to the MasterBus network (based on the CAN protocol). By connecting it, you can monitor the load, configure the device, and read any alarms directly from compatible displays on your dashboard.

No, the MasterBus network power supply capacity from the transformer is only active when shore power is present and the device is powered on.

This indicator shows overheating of the device (ambient or internal temperature too high). You must reduce the vessel's electrical consumption, allow the transformer to cool, then reset it using the Standby/On button or via the MasterBus interface.

The device supports ambient temperatures up to 40°C, allowing installation in a technical compartment. However, it must never be installed in areas with risks of gas or combustible dust explosions. Adequate ventilation remains essential.

The IP23 rating certifies that the housing is protected against the intrusion of solid objects larger than 12.5 mm (such as fingers) and against water from rain falling at up to a 60° angle. It must therefore be installed inside the boat, away from direct water splashes.

For absolute safety and compliance with standards, the protective earth (located at the transformer output terminal) must be connected to the vessel's central grounding point.

If the charge LED lights up red at around 100%, this indicates an imminent overload (demand exceeds the 32A nominal rating). The device will soon shut down for safety. Immediately turn off any high-power equipment on board.

Absolutely. With a continuous 32A capacity (7000 VA), this model is specifically designed for large boats requiring high power demand (air conditioning, desalinator, high-capacity battery chargers).

No, the unit is supplied alone with its built-in cable glands for cable routing. AC cables are not included because their length and type depend specifically on your boat's configuration and installation.

The transformer front panel is fitted with an LED indicator bar. These LEDs light up progressively (from 5% to 100%) to visually indicate the current load drawn at the dock relative to the device’s rated capacity.

Yes, the Mass GI 7.0kW is designed for demanding environments. Its operating temperature range is from -20°C to 60°C. It can even be stored undamaged at temperatures down to -40°C.