The galvanic isolator is tested for its ability to withstand the application of which current during the short circuit test?

The correct response is based on the testing standards for galvanic isolators, which are typically assessed using alternating current (AC) in their short circuit tests. This is because most electrical systems on vessels operate with AC power, and the durability and performance of components like galvanic isolators need to be evaluated under conditions that reflect their real-world application.

In a short circuit scenario, the isolator must be capable of handling the fault conditions that occur with AC circuits, including the RMS (Root Mean Square) values of voltage and current. Testing with AC current ensures that the isolator can effectively isolate different electrical systems aboard a vessel and prevent galvanic corrosion without failing under typical operational stresses.

Other types of current, such as direct current (DC), pulse current, or peak current, do not accurately simulate the conditions that galvanic isolators will encounter in practical scenarios. Hence, the focus on AC (RMS) current for these tests is crucial for ensuring the safety and reliability of marine electrical systems.