May 2021

SAEED ROOSTAEE

Dr. SAEED ROOSTAEE (Sr. Technical Trainer (Protection Relay IEDs, IEC 61850, Substation Automation)) Dr. Saeed LinkedIn Profile Technical Trainer (2012 to Present) Trained and certified more than 3000 engineers worldwide (Online, Pre-recorded and face-to-face training) Samples of the training courses that can be held by Dr. Saeed Roostaee (generally any customized training power system protection

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– Anyone knows why we are using this diode and what it uses1) Normal Diode allows current to flow in forwarding bias.2) Zenner Diode allows current to flow in reverse bias only. -Two phases show negative values but one phase shows positive values, how?– Depend on load, may you try to trace 3 line diagram

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