# Fortescue calculus **URL:** \ **Category:** openPDC\ **Created:** [April 15, 2025, 5:51pm UTC](http://discussions.gridprotectionalliance.org/t/fortescue-calculus/1393 "2025-04-15T17:51:46Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Andre\_Santos](http://discussions.gridprotectionalliance.org/user_avatar/discussions.gridprotectionalliance.org/andre_santos/32/856_2.png) [@Andre\_Santos](http://discussions.gridprotectionalliance.org/u/Andre_Santos)\ **Post date:** [April 15, 2025, 5:51pm UTC](http://discussions.gridprotectionalliance.org/t/fortescue-calculus/1393/1 "2025-04-15T17:51:46Z")
Hi, is there anything ready envolving Fortescue calculation in open family? André ---
**Author:** ![ritchiecarroll](http://discussions.gridprotectionalliance.org/user_avatar/discussions.gridprotectionalliance.org/ritchiecarroll/32/2_2.png) [@ritchiecarroll](http://discussions.gridprotectionalliance.org/u/ritchiecarroll)\ **Post date:** [April 15, 2025, 5:55pm UTC](http://discussions.gridprotectionalliance.org/t/fortescue-calculus/1393/2 "2025-04-15T17:55:15Z")
We have symmetrical phasor calculations, for positive, negative and zero sequence values: [gsf/Source/Libraries/Adapters/PowerCalculations/SequenceCalculator.cs at master · GridProtectionAlliance/gsf](https://github.com/GridProtectionAlliance/gsf/blob/master/Source/Libraries/Adapters/PowerCalculations/SequenceCalculator.cs) If that’s in the vein of the calculations you are considering… Thanks, Ritchie ---
**Author:** ![Andre\_Santos](http://discussions.gridprotectionalliance.org/user_avatar/discussions.gridprotectionalliance.org/andre_santos/32/856_2.png) [@Andre\_Santos](http://discussions.gridprotectionalliance.org/u/Andre_Santos)\ **Post date:** [April 15, 2025, 6:29pm UTC](http://discussions.gridprotectionalliance.org/t/fortescue-calculus/1393/3 "2025-04-15T18:29:20Z")
Yes!! What document I start to look to implement it?