GridCircuits
Free substation automation, protection & control, SCADA and transmission engineering tools.
Category: Developer Tools | Tags: #free #calculators #scada #relay | Listed: 2026-11-04
Free engineering tools for substation automation, protection & control, SCADA, RTU and transmission engineers. Tools include relay curves, CT sizing, distance and differential settings, coordination, transformers, fault current, power flow, voltage drop, Ohm's law and conductor sizes. Every tool shows its formula and standard clause and runs in the browser.
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