Eaton EDR 3000, Installation, Operation And Maintenance Manual

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EDR-3000 IM02602003E
79 - Automatic Reclosure
AR
The autoreclosure is used to minimize outages on overhead lines. The majority
1
(>60% in medium voltage and >85% in
high voltage) of faults (arc flash over) on overhead lines are temporary and can be cleared by means of the
autoreclosure element.
De-select the autoclosure element within the device planning menu if the
protective device is used in order to protect cables, generators, or
transformers.
Features
The autoreclose function is designed with diverse, very comprehensive yet flexible features which meet all
requirements of different utility concepts and technical applications.
The available features of the autoreclose function can be summarized as follows.
Flexible assignment of initiate functions for individual shots.
Maximum of six autoreclose shots.
Dynamic adjustment of protection setting values (e.g.: pickup, time delay tripping curve, etc.) during autoreclose
process via adaptive set concept.
Reclose shots per hour limit.
Autorecloser wear monitor with maintenance alarm.
Programmable reclosing blocking feature.
Auto zone coordination with downstream reclosers.
Automatic manual-breaker-close blocking feature.
Manual/Auto reset lockout (panel, contact input, communications, etc.).
Autoreclose with Sync-check (Only in conjunction with internal Sync-check and Control modules).
External AR shot counter increment is possible.
1: Protective Relaying: Principles and Applications, ISBN 978-0824799182
www.eaton.com 501