What is the minimum duration for each short circuit test applied to the galvanic isolator?

The minimum duration for each short circuit test applied to the galvanic isolator is based on the need to ensure that the device can effectively manage and withstand potential fault conditions without failing. A full cycle of the electrical system provides a complete representation of the voltage and current characteristics, allowing for an accurate assessment of the isolator's performance under short-circuit conditions.

This duration allows testers to observe how the isolator reacts to the maximum fault current and to determine its capacity to isolate and protect the system effectively. Testing for less than a full cycle could result in incomplete evaluation, as it may not reflect the worst-case scenario the isolator would experience in an actual short-circuit event.

Thus, the requirement for a full cycle ensures thorough testing and reliability of the galvanic isolator in real-world applications, making it the correct choice for this question.