Alvaro Espínola 0 Report post Posted January 23, 2017 Does anyone have any vi of overcurrent protection? for substations? simulation only. Quote Share this post Link to post Share on other sites
hooovahh 691 Report post Posted January 30, 2017 Does C++ have any overcurrent protection? C++ just like LabVIEW is software and overcurrent conditions is a physical issue. What do you really mean? Quote Share this post Link to post Share on other sites
Alvaro Espínola 0 Report post Posted January 31, 2017 (edited) I am trying to simulate in LabView, an overcurrent relay of an electrical substation. I need to build the protection VI. Generate internally an overcurrent fault signal that can be compared to a Time-Current Characteristic Curve (IEC or IEEE), and then give a open-circuit signal. HELP! Edited January 31, 2017 by Alvaro Espínola Quote Share this post Link to post Share on other sites
hooovahh 691 Report post Posted January 31, 2017 You didn't give much to go on, since I'm not familiar with IEC or IEEE Time-Current curves. So attached is some code that allows you to set the current and the Amp Hours are then calculated and if it goes over a limit then a boolean turns on. Overcurrent Test.vi Quote Share this post Link to post Share on other sites
agilentvee 0 Report post Posted August 19 overcurrent?the function belong to DMM. you can remote the DMM, however, the labview have no the subvi which can monitor overcurrent Quote Share this post Link to post Share on other sites
Antoine Chalons 73 Report post Posted August 23 NI offfers an electrical power toolkit : http://zone.ni.com/reference/en-XX/help/373375G-01/ Quote Share this post Link to post Share on other sites
gleichman 10 Report post Posted August 25 (edited) Why post a critical remark to what looks like a homework question from 2.5 years ago? Acquiring electrical current data is not the challenge of this problem which is very doable with the correct hardware. The challenge is knowing when the current exceeds the "Time-Current Characteristic Curve". The curve defines for a given current level how much time passes before an over-current occurs. The higher the current the quicker the reaction time, but the shapes can vary. Edited August 25 by gleichman Quote Share this post Link to post Share on other sites
