NS250
Secondary Systems - Requirements for CT, VT and tripping circuits
NS250: Secondary Systems - Requirements for CT, VT and tripping circuits
This Network Standard is Ausgrid's specification on requirements for Voltage Transformer (VT), Current Transformer (CT) and Circuit Breaker (CB) trip circuits.
Scope
This standard describes the following circuits within zone and subtransmission substations:
- CT circuits
- VT circuits
- CB trip circuits
This standard describes requirements which apply in addition to the requirements described in NS251, NS253, NS259 and other relevant network standards.