Vzmetni transformator Mass GI 7,0 kW podjetja Mastervolt

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 extremely compact and lightweight devices. The Mass GI 7.0kW weighs only 10 kg while delivering an impressive output of 7000 VA.

This isolation transformer is designed to fit easily into tight 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 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 current on board) is extremely limited, amounting to only 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 AC 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, this is recommended and mandatory under marine electrical standards. You must install a dedicated double-pole circuit breaker along with a 30mA residual current circuit breaker (GFCI/RCD) paired with a 32A fuse at both 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 transformer's ability to power the MasterBus network is only active when shore power is present and the device is powered on.

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

The unit supports ambient temperatures up to 40°C, allowing installation in a technical compartment. However, it must never be installed in an area with risk of gas or flammable dust explosion. Adequate ventilation remains essential.

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

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

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

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

No, the device is supplied alone with its integrated cable glands for cable entry. AC cables are not provided as their length and type depend specifically on your boat's configuration and installation.

The transformer front panel features an LED 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 nominal 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.