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What is the CAT IV / 1000 V measurement category all about?

Figure AA.1 - Example to identify the locations of measuring circuits Source: Standard 61010-2-030 as examples for the CAT rating, e-cars are still missing here. Figure AA.1 - Example to identify the locations of measuring circuits Source: Standard 61010-2-030 as examples for the CAT rating, e-cars are still missing here.
Key

0 Measuring circuits without a MEASUREMENT CATEGORY
CAT II MEASUREMENT CATEGORY II
CAT III MEASUREMENT CATEGORY III
CAT IV MEASUREMENT CATEGORY IV

 

The overvoltage categories were adapted in 2020 with the last update of standard 61010-2-033. Since then, there have been categories above 1000 V. The ranges 1000 V - 1500 V, 1500 V - 2000 V and 2000 V - 3000 V were added.

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