Panel - Power Flow Tab

Enables you to select the panel kVA from the Specified data or from SCADA (Supervisory Control and Data Acquisition) data. SCADA data can be read in by clicking File > Import.

Select the method used to determine the kilovolt-ampere for power flow analysis. Choose between:

• Connected: The kVA is determined by the load defined on the Description tab of the panel.
• Demand: The kVA is determined by the demand factor. Demand factor is calculated as the maximum loading conditions divided by the total connected load. This is specified on the Description tab of the panel.
• Code: The kVA is determined by the code factors. Code factors are derived from the factors set up in the database File Properties on the Code Factors tab which reference NFPA 70 (NEC) article 220.40. You can view or edit the codes on the Description tab of the panel.
• Design: The kVA is determined by the design factor in combination with the code factors. Design factor is set up in Tools > Options on the Equipment tab. You can view or edit the design factor on the Description tab of the panel.

Panels can be modeled for the power flow solution in several different ways.

• Constant kVA: This is the most common model. It is conservative, and will result in slightly lower voltage values than would be measured on an actual system.
• Constant Current: This model alone is generally not used for power flow simulation.
• Constant Impedance: This model is for loads such as incandescent lighting, ranges, and resistance space heaters.

SCADA Data

SCADA data is derived from real time, or metered data, and converted to an ASCII format which can be read into EasyPower. SCADA data is read in as a 100% scaling factor load. The load value is multiplied by the user-defined scaling factor. This provides a way to adjust SCADA loads to form new cases.

The kW value as read in from the SCADA ASCII file.

The kVAR value as read in from the SCADA ASCII file.

SCADA data can be modeled in the power flow solution in several different ways. SCADA load type is set in the ASCII file, and can be changed by you.

• Constant kVA: This is the most common model. It is conservative, and will result in slightly lower voltage values than would be measured on an actual system.
• Constant Current: This model alone is generally not used for power flow simulation.
• Constant Impedance: This model is for loads such as incandescent lighting, ranges, and resistance space heaters.