SIGRA_MANUAL_B1_EN.pdf

2 for details on the ground impedances and coupling

  • No School
  • AA 1
  • 154

This preview shows page 86 - 89 out of 154 pages.

2 For details on the ground impedances and coupling factors, refer to chapter 6.9. 1 1/2 Circuit-Breaker Configuration Activate this option if the fault record is based on a 1 1/2 circuit-breaker layout. When you activate this option, the signal assignment for the second current transformer (current transformer B) is shown. RM/RL, XM/XL Coupling factors for the parallel-line compensation Earth Current from Node From the list box, you can carry out the parallel-line compensa- tion by selecting a network node with the ground current. Operating Current Enter the rated operating current in this field. Field Meaning
Image of page 86

Subscribe to view the full document.

Fault Records 3.10 Parameterizing fault records 87 SIPROTEC, SIGRA, Manual E50417-H1176-C070-B1, Edition 06.2017 Figure 3-25 1 1/2 Circuit-Breaker Configuration Assign all signals for both current transformer A and current transformer B. Click OK . The Network configuration dialog is closed and the summation currents are assigned. The next time you open the Network configuration dialog, the assignment of the summation currents is shown. You can change the primary and secondary transformer data for the summation currents. They are only rele- vant for calculating the primary and secondary impedance for fault location. After assigning the summation currents, you cannot change the signal assignment for the current transformers. To change the signal assignment later, you can disable the option 1.5 CB Configuration and then reactivate it. The assignment of the summation currents is deleted as a result. It is possible to assign the signals for the current transformers again. The following restrictions apply to the 1.5 CB Configuration :
Image of page 87
Fault Records 3.10 Parameterizing fault records 88 SIPROTEC, SIGRA, Manual E50417-H1176-C070-B1, Edition 06.2017 If the option is activated, the multiple assignment of one signal within a network node is not possible. The option is only available for the network nodes K1, K2, and K3. If the option is activated, the simultaneous configuration of multiple network nodes is not possible. 3.10.2 Selecting the frequency source From the fault record data, SIGRA calculates further values such as harmonics or vector values. The network frequency is included as parameter in these calculations. The source of the network frequency is selected via the Settings dialog. The settings made in this dialog apply to all fault records. The following can be selected as source of frequency: the fault record with the frequency specification in the *.CFG file the frequency calculated from the signal data by SIGRA the frequency defined by the user If the automatic detection methods calculate the wrong frequency, it is possible to define this frequency. Select the menu item Options > Settings . The Settings dialog is opened.
Image of page 88

Subscribe to view the full document.

Image of page 89
  • Fall '19
  • Sigra

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern