what is max fault that 200A sensor can take without saturation?

The CT saturation current level is not published by R&D. However, we guarantee that the VIP400 will operate as specified in the manual. For example, if you make a Phase Overcurrent setting at 2 times Nominal Current with IDMT curves, the trip time will be within specifications, even if CT saturation occurs.

As per the VIP400 manual, the Phase Current inputs can withstand a fault level of 25kA for 2 seconds at room temperature.

Released for: Schneider Electric India