Valence Electrical Training Services

Reclose Function

Does anyone have a practical plan for testing the reclose function? I have used amp buckets run through the the breaker to the current input so that the fault current is present as soon as the breaker recloses but this is not always convenient.


Are you talking about a recloser relay connected to a breaker or an all-in-one recloser unit with no available secondary current inputs to the control system?


For example the reclose function on an SEL 351, or SR 750. The issue has been how to maintain current to simulate the fault as the simulation of the breaker goes through the reclose scheme. If the current stays on after the trip then the relays thinks there was a breaker failure and will not reclose. If the current is not immediately available when the breaker closes then the fault is not seen and the relay will reset.


About the Author TechTalk Contributors

TechTalk contributors are readers who have taken the time to ask a question, or has joined the community by adding a post with this form. You can join the community too.

Leave a Comment:

Add Your Reply