
The Mass GI is an isolation transformer, based on
switch mode technology, providing you with separation between AC
shorepower and the boat’s onboard AC electrical
system.
Preventing galvanic corrosion in your vessel’s metal underwater
gear, hull or other electrically-connected parts is critically
important to prevent expensive damage. If you travel to harbors
with questionable shorepower systems, or if neighboring boats may
be transmitting stray current, galvanic isolation is necessary.
Key Features
Features:
- Small, light high-frequency design: The Mass
GI 7 is an extremely small and lightweight isolation transformer
that includes the latest high-frequency electronics switch
technology. This ensures surges and differences in electrical
polarity are handled with ease. - Install multiple units for more capacity:
Suitable for 120V and 230V AC systems, its capacity can be parallel
coupled for higher capacity. Two units correspond to double its
size. - Maintains the same voltage and frequency:
Isolation transformers like the Mass GI 7 maintain the incoming
line voltage and frequency. Compatible with 90 to 255V AC and 45 to
654Hz frequency. - Quiet and versatile: The Mass GI isolation
transformer can be fitted in any position on a wall or floor. No
rubber mountings are necessary because it does not vibrate or
hum. - Integrated Soft Start: The integrated Soft
Start manages the current resulting from connection to the shore. A
LED indicator on the box displays load data. - Data link to MasterBus: Mass GI
communicates via the MasterBus network for remote control and
remote (alarm) monitoring of the Mass GI, for configuration (in
parallel) and for communication with other system devices
General Specifications
Features:
- Output voltage: (Same as input voltage plus or
minus 5%) 90-255 V AC - Output frequency range: Same as input
frequency, 45-65 Hz - Nom. input current at 230 V: 32 A
continuous - Input frequency range: 45-65 Hz
- Efficiency: < 93 %
- Nominal Power: 7000 VA at 230V
- Dimensions: 13 3/8’H x 10 5/16’W x 9
13/16’D - Weight: 22.0 pounds
Technical Specifications
Features:
- Technology: high frequency
- Earth leakage switch: no
- No-load power consumption: 44 W
- Temperature range: (ambient temp.) 0-40
degreesC, derating with 5% per degreesC
32 to 32 degreesF, Switch off at 80 degreesC - Relative humidity max.: 95%
- Waterproof Rating: IP21 (not waterproof
- Cooling: variofan
- MasterBus compatible: yes
- Switch-off behavior: breaker
B-characteristic - Soft start: yes
What’s in the Box
Features:
- Mass GI 7
- MasterBus cable (in connection compartment)
- MasterBus terminator (in connection compartment)
- Manual
Specifications:
| Name | Value |
|---|---|
| Amperage | 140 Amps |
| Multi Bank Chargers | 2 Banks |
| Type | Battery Isolator/Combiners |
| Voltage | 12 Volts DC |








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