The Relay Testing Handbook: End-to-End Testing covers the most common Communication-Assisted Protection Schemes including the Directional Comparison Unblocking (DCUB) Scheme. This bonus animation shows the steps involved for a DCUB 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.
See if you can accurately predict what will happen at different fault locations with a Directional Comparison Unblocking (DCUB) Scheme.
Click on the image below to start the animation. Press “What happens Next” to move through the animation. Press “Move the Fault” to change the fault location.
