YOKOGAWA WT3002E - Page 204

12-3
IM WT3001E-51EN
Voltage Fluctuation and Flicker Measurement (Option)
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Index
Period during which relative voltage change exceeds the threshold level Tmax
The time during which the relative voltage change during a voltage fluctuation period
exceeds the threshold level.
Relationship between dc, dmax, and Tmax
• For IEC 61000-4-15 Ed1.1
dmax
dc
Tmax
Threshold
level
Steady-state condition
Relative voltage change
• For IEC 61000-4-15 Ed2.0
Threshold
level
Steady-state condition
Tmax
dmax
dmax +
dmax -
dc
Previous steady-state
condition
Relative voltage change
dmax +: The difference between the minimum value and the value in
the previous steady-state condition
dmax –: The difference between the maximum value and the value in
the previous steady-state condition
dmax: The larger of the absolute values of dmax + and dmax –
12.1 Voltage Fluctuation and Flicker Measurement Function