Auto Section Switch for Indoor and Outdoor
Introduce
Ass that installed at 22.9kV multi and neutal grounded distribution line, less than 4,000 kVA capacity (2,000kVA in special load) can separate the faulted line speedfully by its tripping operation in order to reduce the customer’s damage due to the faulted current. Besides ASS is possible to coordinate to Recloser or Circuit Beaker according to user’s specification.
Basic Functions
Over current Protection
The ASS can break the over current less than 880A in compliance with Time-Current Characteristic Curve.
Coordination of protection with Recloser or Circuit Breaker
The ASS can opened in order to separate the faulted line even though the faulted current is removed by operating of the Recloser or Circuit Breaker prior to ASS opening.
Blocking Inrush Current
One function of ASS controller can be blocking inrush current that may be occurred during closing operation.
Locking over current
The ASS is locked when the faulted current is over 880A and it will be opened after the faulted current is removed by other equipments such as Recloser or Circuit Breaker, fuses.