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Capacitor Data

This dialog box includes the following areas and tabs:

Figure 1: Capacitor Data Dialog Box

Connection Information

Option Description
ID Name Uniquely identifies the capacitor. This ID name can be up to 16 characters long. The names default to CAP-1, CAP-2, CAP-3... as you enter new capacitors on the one-line, but you can change those names to make them more descriptive if needed.
To Bus The bus the capacitor connects to, which must already exist on the one-line. For your reference, the To Bus base kV is displayed next to the bus name.

Specifications

Option Description
Rated kV Capacitor rated kV. This is used to determine the per-unit impedance of the capacitor for a given base kV.
Rated Size Capacitor MVAR or kVAR rating at the rated voltage. The unit is specified in the box on the right.
Inrush Specify the inrush current and duration for the capacitor. This is used in auto-coordination.

Harmonics

Use the Harmonics tab to indicate whether this equipment item is introducing harmonics into your power system.

Figure 2: Harmonics Tab

Option Description
Resistance Factor

EasyPower offers two methods for calculating RH:

  • Resistance varying with a power of the harmonic (R-EXP):

    • RH = RFund * H R-EXP

  • Resistance varying with a percent eddy current factor (%ECF):

    • RH = RFund * (1+ECF*H2)/(1+ECF)

EasyPower defaults all skin effect correction to R-EXP and a value of 0.5.

Typical Resistance Correction Factors
  R-EXP %ECF

Transformer

0.5-1.0

1.0-3.0

Utility

0.0-0.8

    -

Generator

0.3-0.6

    -

Line/Cable

0.5

    -

Reactor

0.5-1.0

0.8-3.0

Motor

0.2-0.4

    -
Fundamental Amps

Use to set the fundamental amps. The options are as follows:

  • Equipment Rating sets Fundm Amps to the equipment rating of the item described in the Specifications tab. 
  • User Specified activates the Fundm Amps field, enabling you to specify a value. 

To use fundamental current calculated by power flow, select Calculated from Power Flow in the Summation Fundamental Voltage area of the Harmonics Options > Control dialog box.

Location

See Location for more information.

Imported Data

This tab is read-only and appears only if you have imported data from an SKM Data Format file. See Importing an SKM Format File for more information.

Comments

See Comments for information.

Hyperlinks

See Hyperlinks for information.

More Information

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EasyPower Version 9.7

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Help was last updated on 2/8/2016