TPC User Online Manual
Three phase electrical circuit analysis with TPC 3.55.Step-by-step instructions and technical documentation for calculating three phase electrical circuits in TPC 3.55.
Three Phase Circuits 3.55 (TPC 3.55) is designed for the calculation of three-phase electrical circuits in any configuration, including Y/Y, Y/Δ, Δ/Y, and Δ/Δ. The software generates a detailed step-by-step solution with a report exportable to MS Word (.docx).
Three Phase Circuits (TPC) Requirements:
- Operating System: Windows 7, 8, 10, 11, and later.
- Microsoft Word versions: 2007-2024 and later.
Three Phase Circuits (TPC) Requirements:
- Operating System: Windows 7, 8, 10, 11, and later.
- Microsoft Word versions: 2007-2024 and later.
1. Program Working Window, Interface
The TPC working window is shown in Figure 1. It consists of the following functional blocks:
1) Main Menu
2) Circuit Configuration Panel
3) Options panel
4) Utility for calculating line/phase impedances
1) Main Menu
- "File" Submenu - Creates a new diagram, exits the program;
- "Options" submenu contains the following items: language settings, element notation system.
- "Activation" Submenu - Enters the activation code (license key),
Required to upgrade from the demo version of the program to the fully functional licensed version;
- "Help" Submenu - Links to help materials on using the program, as well as information about the current version.
2) Circuit Configuration Panel
3) Options panel
4) Utility for calculating line/phase impedances
1) Main Menu
- "File" Submenu - Creates a new diagram, exits the program;
- "Options" submenu contains the following items: language settings, element notation system.
- "Activation" Submenu - Enters the activation code (license key),
Required to upgrade from the demo version of the program to the fully functional licensed version;
- "Help" Submenu - Links to help materials on using the program, as well as information about the current version.
Figure 1 – TPC working window
2) Circuit Configuration Panel
The panel allows you to select one of the possible configurations of a three-phase circuit: a) a three-phase source (generator) connection diagram - Y, Δ; b) a three-phase load connection diagram - Y, Δ (see Figure 2).
Figure 2 – Circuit Configuration Panel
Selected three-phase circuit configuration
The selected three-phase circuit configuration will be displayed in the working window (see Figure 3).
Figure 3 – The selected configuration of a three-phase circuit, three-phase source - star (Y), three-phase load - delta (Δ)
3) Options panel
The parameters panel is used to set the initial numerical values for the source and load:
· RMS values of the voltages/EMF of the three-phase source;
· Line impedances of the three-phase system (Aa - Za, Bb - Zb, Cc - Zc, see Figure 1);
· Phase impedances of the three-phase system (A - ZA, B - ZB, C - ZC, see Figure 1);
· Neutral impedance (if a neutral is present in the circuit).
The parameters panel also allows for setting emergency modes—line breaks and (or) phase short circuits—which can be enabled (or disabled) by checking (or unchecking) the corresponding box (see Figure 1).
The parameters panel is used to set the initial numerical values for the source and load:
· RMS values of the voltages/EMF of the three-phase source;
· Line impedances of the three-phase system (Aa - Za, Bb - Zb, Cc - Zc, see Figure 1);
· Phase impedances of the three-phase system (A - ZA, B - ZB, C - ZC, see Figure 1);
· Neutral impedance (if a neutral is present in the circuit).
The parameters panel also allows for setting emergency modes—line breaks and (or) phase short circuits—which can be enabled (or disabled) by checking (or unchecking) the corresponding box (see Figure 1).
4) Utility for calculating line/phase impedances
Данная утилита предназначена для расчета импедансов линий и фаз в случае если они заданы не комплексной велbчиной Z, а элементами – резисторы, индуктивности, емкости.
Рассмотрим пример использования утиллиты.
На рисунке 4 показана схема где фазы источника соединены звездой (Y), фазы нагрузки соединены звездой, конфигурация схемы Y-Y. Линии содержат элементы R, L. Трехфазные приемник (нагрузка) содержит емкостные элементы С.
Рассмотрим пример использования утиллиты.
На рисунке 4 показана схема где фазы источника соединены звездой (Y), фазы нагрузки соединены звездой, конфигурация схемы Y-Y. Линии содержат элементы R, L. Трехфазные приемник (нагрузка) содержит емкостные элементы С.
Figure 4 – Example of a Y-Y (Wye-Wye) type three-phase circuit
Example
Let's give an example of calculating the impedance of lines/phases
The numerical values are set as follows: rf = 5 Ohm, Lf = 10 mH, Cf = 500 uF. To calculate the complex impedances of the lines and phases, use the utility (see Figure 5).
To perform the line "a" impedance calculation (see Figure 4), follow these steps:
1.) Enable the utility (see Figure 4) by checking the box;
2.) Set the AC frequency (in the example shown in Figure 5, f = 60 Hz);
3.) Set the switch to "Line Impedance";
4.) Set the "Select Line/Phase" switch to "A/a/ab";
5.) In the "Select Elements" group, enable "Z1" since elements rf and Lf in Figure 4 are connected in series.
To perform the line "a" impedance calculation (see Figure 4), follow these steps:
1.) Enable the utility (see Figure 4) by checking the box;
2.) Set the AC frequency (in the example shown in Figure 5, f = 60 Hz);
3.) Set the switch to "Line Impedance";
4.) Set the "Select Line/Phase" switch to "A/a/ab";
5.) In the "Select Elements" group, enable "Z1" since elements rf and Lf in Figure 4 are connected in series.
Figure 5 – Example of calculating the line "a" impedance (see Figure 4)
let's continue the example
Note for step 4): If elements rf and Lf were connected in parallel, you would need to select "Z2||Z3".
6) The enabled Z1 element is represented by a set of components: R1, L1, and C1. Select R1 and L1 (see Figure 5). Assign the following numerical values to these elements: R1 = rf = 5 Ohm, L1 = Lf = 10 mH. Do not enable element C1, as it is not present in the circuit.
7.) Click the "Calculate Impedance" button. As a result, the impedance for line "a" will be calculated, and the result will appear in the "Line Impedance" group (see Figure 6).
Line impedances "b" and "c" are calculated in a similar way. For the example in Figure 4, keep the component configuration shown in Figure 6 the same, switch the "Select Line/Phase" element from "A/a/ab" to "B/b/bc" and "C/c/ca," and then click "Calculate Impedance" again.
To calculate the load phase impedances, use a configuration similar to Figure 6, but set the "Line Impedance" switch to "Line Phase".
6) The enabled Z1 element is represented by a set of components: R1, L1, and C1. Select R1 and L1 (see Figure 5). Assign the following numerical values to these elements: R1 = rf = 5 Ohm, L1 = Lf = 10 mH. Do not enable element C1, as it is not present in the circuit.
7.) Click the "Calculate Impedance" button. As a result, the impedance for line "a" will be calculated, and the result will appear in the "Line Impedance" group (see Figure 6).
Line impedances "b" and "c" are calculated in a similar way. For the example in Figure 4, keep the component configuration shown in Figure 6 the same, switch the "Select Line/Phase" element from "A/a/ab" to "B/b/bc" and "C/c/ca," and then click "Calculate Impedance" again.
To calculate the load phase impedances, use a configuration similar to Figure 6, but set the "Line Impedance" switch to "Line Phase".
Figure 6 – Example of calculating the impedance of line "a" including elements rf and Lf (see Figure 4).
Download test models of three-phase circuits and check your calculations
We have developed virtual models of three-phase circuits with the following configurations: Y/Y, Y/Δ, Δ/Y, Δ/Δ, which contain virtual instruments for measuring key parameters in real time.
