PCS-978S transformer relay provides fast and selective protection, control and monitoring for two-winding transformers, three-winding transformers, auto-transformers, as well as shunt reactors. The full transformer protections are configurable by user. Ancillary functions of fault diagnostic, disturbance records, event records and communication function are integrated in the device.
PCS-978S is applicable not only to conventional substations, but also to digital substations. It supports IEC 61850 Editions 1 and 2 and provides GOOSE and SV network interfaces with high real-time performance. The process level network supports peer-to-peer (P2P) mode and networking mode, including single network mode and dual network mode. The station level network could also receive and send MMS messages (such as interlocking signals) or process level GOOSE messages (such as trip signals).
Санал авах
Transformer differential protection (87T)
Inrush blocking
CT saturation blocking
Overexcitation blocking
CT circuit failure blocking
Amplitude compensation
Phase angle compensation
Restricted earth-fault protection (64REF)
Winding differential protection (87W)
Reactor differential protection (87R)
Inter-turn fault protection for reactor (21IT)
Four zone phase-to-phase distance protection (21T)
Four zone phase-to-ground distance protection (21T)
Energy metering (active and reactive energies for import and export)
DC analog inputs for transducers (0~20mA or 0~±10V)
CT circuit failure supervision (CTS)
VT circuit failure supervision (VTS)
Tripping circuit supervision (TCS)
Self diagnostic
Powerful faults recording (max. buffer for 10,000 sampled points at 1.2 or 9.6kHz)
Event recorder including 1024 disturbance records, 1024 binary events, 1024 supervision events, 256 control logs and 1024 device logs
Disturbance recorder including 64 disturbance records with waveforms (the file format of disturbance recorder is compatible with international COMTRADE file)
