I used ISO7762 in a 3.3kV system, where the primary side is 3.3kv level to earth and the secondary side is floating that is no electrical connection to earth. The power supply of secondary side is from a 3.3kV isolation rating power source coming from primary side. Now I'm evaluating feasibility of the design in 10kV system, where I think ISO7762 can be used because I think the secondary side is floating so there should not be a high voltage difference of two sides. So the system can still work. Could you please tell me that if my thinking is correct or not? Thanks!