IEC 61000-4-30:2008 specifies to aggregate data for 150/180-cycle, 10-minute, and 2-hour intervals. IEC 61000-4-30:2008 defines three classes of aggregation: Class A, Class S, and Class B. The LabVIEW Electrical Power Toolkit follows Class S and uses the following intervals for aggregating data:

  • 150/180-cycle aggregation—Aggregate data using a 150-cycle interval for 50 Hz systems and a 180-cycle interval for 60 Hz systems. The 150/180-cycle interval corresponds to fifteen 10/12-cycle blocks without gap.
  • 10-minute aggregation—Aggregate data using a 10-minute interval, which corresponds to 3,000 10/12-cycle blocks. There is no overlap between adjacent aggregation intervals.
  • 2-hour aggregation—Aggregate data using a 2-hour interval. The data for the 2-hour aggregation is from the values of twelve 10-minute intervals. There is no overlap between adjacent aggregation intervals.

The Electrical Power Toolkit automatically restarts data accumulation at the beginning of the next aggregation interval after the previous aggregation interval expires.

Frequency Aggregation

In frequency aggregation, you aggregate frequency values by using 10-second intervals that corresponds to a non-integer number of cycles because the power frequency might not be exactly 50 Hz or 60 Hz within a given 10-second interval. The Electrical Power Toolkit automatically restarts data accumulation at the beginning of the next 10/12-cycle block after the previous 10-second aggregation interval expires. You can use 10-second values to calculate site and system indexes.

Flicker Aggregation

The Electrical Power Toolkit complies with IEC 61000-4-15:2010 for the aggregation of flicker measurements. The basic aggregation intervals are the short-term flicker and long-term flicker.