Power Quality Group definition

Power Quality Group are defined in the PowerQualityGroups.csv file which is located under the folder:

{root install folder}\Applications\PowerQuality\

The format of the comma delimited file is as follows:

<Power Quality Group Name>,<Incomer Meter>,<Feeder Meter>,<Load Meter>,<Rate>

Where:

  • Power Quality Group Name – The name for the group (target process). It is used for selecting the group in Power Quality Impact gadgets and report.
  • Incomer meter – The meter monitors the incomer. It typically has the PQ event detection capability. The event it captures will be used in the analysis.
  • Feeder Meter – The meter between the incomer meter and the load meter (could be multiple). The PQ events it captures can potentially impact the process at its downstream. If a feeder meter does not support PQ event detection, then there is no need to include it in the definition. See the examples in next section.
  • Load Meter – Contains the Process Impact Alarms. The Power Quality Impact Gadgets and Report will not work if the load meters are not defined for the Power Quality Groups. It can be a logical device if the Process Impact Alarm is defined on a logical device. See Set up process impact alarms for more information. The load meter typically doesn’t have PQ event detection capability.
  • Rate – The flat hourly rate for the cost impact calculation

NOTE:

  • The file structure only allows one incomer meter, one feeder meter, and one load meter per row. If, for a category, more than one meter needs to be included, define them in multiple lines with the same group name.
  • The file structure allows one rate per group; define it only in the first row of the group.
  • The PQ events captured by the meters in a Power Quality Group will be clustered before associating with the Process Impact Alarms, so that the same event seen by different meters are counted only once.
  • Only the PQ events captured by the incomer meter and feeder meter are considered in the analysis. If the load meter supports PQ event detection, and you want to include the events it detects into the analysis, you need to define it as a feeder meter as well. See the examples in next section.
  • The incomer meters defined are also used by the Power Factor section of the Power Quality Analysis Report to determine the incomer meters in the system. See the examples in next section.