Dranetz Energy Platform User Manual page 201

Range of
Variations per
IEEE standard
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A P P E N D I X
Event Classification
Events characterization implemented in the Energy Platform adheres to the IEEE 1159
measurement standards. The range of variations as per IEEE standards are featured
below.
Short Duration Variations
Magnitudes
Sag/Dip (Sag) Vrms Below 90% (or Low limit) to 10% of nominal
Swell Vrms Above 110% (or High limit) to 180% of nominal
Interruption Vrms Below 10% (or Very Low limit) of nominal
Temporal
Instantaneous 0.5 - 30 cycles
Momentary 0.5 - 30 seconds
Temporary 3 - 60 seconds
Duration begins when any one phase is Out of Limits; ends when all
phases are Within Limits
Long Duration Variations
Magnitudes
Sag same magnitude values as Short Duration Variations (see above)
Swell
Interruption
Duration
Sustained > 1 minute
Cold Load Pickup is
return from sustained
PowerMeterStore
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IEEE 1159
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