Hello All,
I appreciate if someone can recommend me some articles, books and manufacturer application notes concerning to breaker and one half stations.
The main reason is that here in Costa Rica we don´t have any station of this type. Now we´re going to buy some but there´s no...
Hello All,
Recently I´ve experienced a problem with a 7SA513 Siemens protection relay. Here´s the story.
I took it from our stock to install in a substation and when we tried to turn it on we found that the relay didn´t perform the complete starting process. It took us like 3 hours...
I´m working on a Voltage Stability Study of the Costa Rica´s Electrical System. The study is about developing a methodology for calculating the expected and actual MVAR margins for voltage stability. Also the study implies founding critical contingencies for voltage instability, V-q curve...
I´m working with EPRI´s PTLOAD program for a Transformer and Autotransformer Loadability Study. The software asks me to put the following features:
No load-core- loss
Load loss for an operating point -for instance nominal load-
I´cant get the information about these values, the manuals I´ve...
I´m investigating about CT selection, from all the papers about current transformers can´t found any method for TC selection on a generator line. The ANSI/IEEE rules do not apply because of the dc offset of the generator contribution to the fault. My interest is to obtain good measured signals...
