Ring Wave Immunity Test

ring waveform IEC 61000 4 12

The IEC 62052-11 Ed.2 comes with a lot of changes for meter type testing. Another new introduced test for electromagnetic compatibility (EMC) is the ring wave immunity test.

The Critical Change Value

Aristo Trilog slide rule

The critical change value indicates the maximum amount of change allowed in the meter’s energy registers during disturbance tests without any current flowing in the meter’s current circuits.