All Feeder Load Summary Report - Intergraph Smart Electrical - Help - Hexagon

The All Feeder Load Summary Report is a summary of the loads that are connected to the buses of a power distribution board that you select in the Electrical Index or the Electrical Engineer. This report is based on either the consumed or rated power of the selected loads.

The software takes into account any existing equipment that is connected in parallel.

The All Feeder Load Summary Report provides a list of loads that are associated with power distribution boards, to sum the electrical kW, kVAR values of these loads and, based on the coincidence factors of the relevant buses or the individual loads, calculate normal and peak consumptions that enable you to estimate the required capacities that a particular PDB has to deliver. The report sums the loads that are connected to the downstream buses. This ability to look for downstream loads that are fed from the selected bus is sometimes called "drill down" or "roll up".

Displaying Plant Item Values for Plant Operating Cases

Just before the software starts generating your report, it automatically opens a dialog box which allows you to select the plant operating cases for which you want to run the report. As a result, the generated report will contain sets of load data, each set for a different operating case that you select. This way you can compare the various bus loadings at different operating cases and use them as a basis for equipment sizing. If only one operating case exists in the plant, the software generates the report without opening this dialog box.

Prior to generating your report, select an appropriate template that enables case data. The following templates are available with the shipped reports:

• Multi-Sheet Switchboard Summary.xlsm

All Feeder Load Summary.xlsmAfter you start generating an All Feeder Load Summary report, the software retrieves the data of all the loads that are connected to the buses that belong to the PDBs or buses that you selected in the Electrical Index or the Electrical Engineer and starts the bus drill-down calculation. The software retrieves the values for one bus at a time (the summary is per bus within the selected PDB) including the loads that are connected to the downstream loads that are connected and fed from the bus for which the software calculates the summary. The generated report shows the individual loads connected to the bus as well as all the feeders that feed the downstream buses and their loads.

Calculations

When making calculations, Smart Electrical considers the worst-case scenario in its calculation results and does not take into account any load flow that would be taken into account by a power analysis application such as ETAP. That is, for calculation purposes, Smart Electrical always assumes that the total connected load is supplied from one source only. If there are multiple sources that supply the same connected load, Smart Electrical assumes that each source has the capability to supply the connected load. Smart Electrical, unlike any power analysis application, does not account for multiple sources that share a load. Consequently, in Smart Electrical, the total load for a distribution network can appear artificially high unless the Circuit Mode property is set to either Connected or Disconnected as required on specific circuits.

The All Feeder Summary report shows consumed or rated power values, compensated or uncompensated for the coincidence factors of the buses or loads (depending on the preference settings). For details, see Set All Feeder / Multi-Sheet Load Summary Report Preferences.

Furthermore, this report also shows the kV and kVAR values for individual loads grouped according to the relevant operation mode of the load. The report also includes the converting equipment power losses data as well as circuit totals.

Note that circuits have a property called CircuitMode with values Connected and Disconnected. If you set this property to Disconnected, the drill down algorithm will stop the calculation and the software will not roll up the loads connected to this circuit.

At the bottom of the All Feeder Load Summary report, the software displays the calculated compensated totals of all the loads at normal and peak operations.

Calculations Based on the Largest Non-Continuous Load

When you generate a report based on the largest non-continuous load (see Calculate Bus Loading According to the Largest Non-Continuous Load), the report displays special indications to this effect.

• The report title states that the report is calculated according to the largest non-continuous load.

• At the bottom of the report, in the Notes section, the report contains an explanation of how the values in the active and reactive columns have been calculated.

• In case the bus loading calculation has been made based on the largest non-continuous load, a background color is used to mark the active and/or reactive values of the largest non-continuous load regardless of whether it's a load directly connected to the bus or rolled up from one of the downstream buses.

• In case the bus loading calculation has been made based on the sigma of the non-continuous loads, no background color is used to mark the largest load.

• If the largest load comes from a downstream feeder circuit that feeds downstream buses, the software adds and shows the downstream largest load item tag and its kw and kva values to enable you to double-check these values if needed. There can be up to three loads with a total of up to six lines, two for each operating mode: the largest intermittent kw, largest intermittent kvar, largest spare kw, largest spare kvar, largest stand-by kw, and largest stand-by kvar.

• The bus totals also show the equation and the values that the software used to make the calculations.

• In case the software detects that the largest load is one of the loads connected to a downstream bus, the report also shows the following:

  • The active and reactive calculated values of the relevant circuits are marked with a background color.

  • The name of the largest load appears below the circuit values.

  • The full equation used to make the calculation is shown at the bottom.

• When using a feeder-incomer connection within the same PDB, the calculation will be the same as for a coupler-riser connection. Therefore, all the results in the switch gear worksheet will display a summation of all buses instead of the upper drilled down peak value of the upper bus.

Report Customization

Note that you can customize your All Feeder Load Summary report. For instructions, see Customizing Smart Electrical Calculation Reports.

Defining a Filter for the PDBs to Be Included in the Report

You can filter a registered report which is based on a report template. This way you can determine which PDBs (and their buses) will be included in your report. The excluded PDBs, although not shown in the report, will be fully accounted for in the overall calculation.

Make sure that the report which you are going to filter is a registered report.

1. In the Filter Manager, create a new filter.

2. Make sure that on the Add Filter dialog, you select Power Distribution Board from the Filter for list.

   
   
   In the example shown above, only the PDBs whose item tags include "LS" and "LM" will be included in the report.

3. In Smart Electrical, open the Registered Report Common Properties and select the newly defined filter from the Filter list.

   

The software will filter the PDBs when you run the report.

• Electrical items are included in calculations if they are defined as consumers. In addition to loads, you can define converting equipment items, cabinets, local panels, and junction boxes as consumers. To define an electrical item as a consumer, you have to set the Is Load property in the Properties window for that item to True or define the electrical item as a Consumer in the relevant Common Properties dialog.

• If you define a converting equipment item, local panel, or junction box as a consumer and perform a drill-down calculation, the software uses the rated and consumed electrical load values of the equipment as the load values, the software ignores the entire branch that is connected downstream from the equipment. Note that you enter the pertinent rated and consumed electrical load values on the Common Properties dialog of the equipment item.

• If you create a circular network that contains several buses that feed other common downstream buses, the report will display a larger than expected value for the total of the circuits. In a circular network, each of the circuits includes common loads and, consequently, the total of the circuits is reflected in the summation of the common loads. To prevent this from happening, disconnect one of the circuits that feeds the downstream buses.

• The circuit totals that are shown in the Bus grid of the report do not account for transformer losses. The bus totals, however, do account for these losses.

• It is also possible to generate a report for a freestanding bus.

• You can customize this report as needed. (Note that VB programming skills are required.) For more information, see Customizing Smart Electrical Calculation Reports.