What is the required percentage of rated voltage and current for testing a galvanic isolator?

The required percentage of rated voltage and current for testing a galvanic isolator is set at 100%. This means that during testing, the galvanic isolator must be subjected to its full rated voltage and current to ensure it operates correctly and efficiently under normal conditions.

Testing at 100% allows for a comprehensive assessment of the isolator's performance, ensuring it effectively prevents galvanic corrosion by isolating the DC ground of the boat's electrical system from the AC ground. This full-scale testing confirms that the device can handle its specified ratings without any risk of failure or inefficiency that could lead to potential hazards or damage to the vessel's electrical system.

Using percentages lower than 100% during testing, such as 75% or 90%, would not adequately verify the isolator's capabilities, as it might not reveal performance issues that could only arise under full-rated conditions. Additionally, 110% is not appropriate for testing, as it could lead to overstressing the device, potentially resulting in damage or unsafe conditions. Therefore, adhering to the 100% standard is critical for both safety and reliability in marine applications.