The Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Permissive Over-Reaching Transfer Trip (POTT) Scheme. This bonus animation shows the steps involved for a POTT trip.
End-to-end testers should understand how this scheme operates before they test it and this animation was created to help relay testers understand distance relay principles.
Click on the following image to open an animation to see if you can accurately predict what will happen at different fault locations with a Permissive Over-Reaching Transfer Trip (POTT) Scheme. Press “What happens Next” to move through the animation. Press “Move the Fault” to change the fault location.
Permissive Over-Reaching Transfer Trip (POTT) schemes have an inherent weakness due to their over-reaching nature. This animation demonstrates a worst case scenario when using a POTT scheme during a sudden reversal.
Can you spot the problem?
Click on the following image to open an animation to see if you can accurately predict what will happen at different fault locations with a Permissive Over-Reaching Transfer Trip (POTT) Scheme. Press “What happens Next” to move through the animation. Press “Move the Fault” to change the fault location.
GREAT TECHNICAL KNOWLEDGE ABOUT RELAYS,THANKS
thanks for your best explanation
Hai hello sir I hope u doing gud I have seen your videos about distance protection awesome explanation thanks for that I need permissive over reach transfer trip POTT video explanation am having doubt on that scheme please explain
Thanks for your question. You can watch this video to see how a POTT scheme works https://relaytraining.com/understanding-distance-protection-21-video/