• Roger Penn

    April 10, 2023 at 15:45

    The high-voltage/hazardous-voltage (HV) parts of the fuel cell stack are NOT grounded (floating ground). So there must be some isolation (non-conductive material) between the HV components (bus plates, cells) and the grounded components (e.g. fluid connectors, hoses, pipes, etc.). On the test station side (or fuel cell system side), there should be grounding of parts to prevent the build-up of static electricity. Careful design of isolation (for anode, cathode, and coolant) must be done to ensure no large leakage current from HV components to grounded components (can cause corrosion and with high leakage currents, loss of isolation or ground faults). Test and system design for HV components and grounded components must be done carefully both for hydrogen safety and electrical safety.

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