Sectionalising equipment operates by reliably detecting and counting upstream reclose operations. When a user-configured number of counts is reached, the sectionaliser opens during the reclose / dead time of the upstream recloser’s sequence. The successful operation of the sectionalising device contributes significantly to the success of the upstream recloser’s automatic restorations and minimises the number of customers affected.
Reliable Operation of Sectionalising Equipment
As with line and lateral recloser operations, sectionalising equipment protection functions must always operate. For sectionalising equipment, the protection function is to detect a fault being interrupted by the upstream recloser and count them. This function should be active and ready to operate at all times, without delay or wake up time. Ideally, deployed line and lateral recloser assets can be configured to perform also as the sectionalising equipment via simple firmware or configuration changes.