Woodward HighPROtec MCDLV4, Руководство пользователя

Страница: 782 / 1275

Protective Elements
AR - Automatic Reclosure [79]
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.
Deproject the autoreclosure element within the device planning 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 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 Synchron-Check (only in conjunction with internal Sync-Check and Control modules).
External AR shot counter increment is possible.
Automatic autoreclose result evaluation (successful/unsuccessful).
Separate counters to register total, successful/unsuccessful reclosing numbers.
1: VDE-Verlag: Schutztechnik in elektrischen Netzen 1, Page179, ISBN 3-8007-1753-0
782 MCDLV4 DOK-HB-MCDLV4-2E