Valence Electrical Training Services

Category Archives for Videos

Distance or Impedance Protection (21) Video

Line distance (21) protection is primarily used to protect transmission lines or other electrical equipment where the equipment’s impedance characteristic can be calculated or modeled with software

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Good Directional Overcurrent Protection (67) Video

Instantaneous overcurrent (50) and time overcurrent (51) protection can protect equipment from overloads and short circuits, but there are situations where their ability to protect a system is limited.

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Good Videos to Help Understand Protective Relays

I’m reviewing information for the next book in The Relay Testing Handbook series and came across this Youtube channel. This is a dated, but excellent, video introduction to overcurrent protection (50/51)

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