SLUAAR5 august 2023 ISO5451 , ISO5452 , ISO5851 , ISO5852S , ISO7741 , ISO7810 , ISO7820 , ISO7821 , ISO7830 , ISO7831 , ISO7840 , ISO7841 , ISO7842 , UCC23513 , UCC5310 , UCC5320 , UCC5350 , UCC5390
Roman numeral is used to define a transient overvoltage condition. That is, a short time overvoltage lasting not more than few milliseconds, oscillatory or not, usually strongly damped.
Figure 1-4 shows an example of overvoltage category reduction in industrial drive system with electrical circuit connected directly to the supply mains.