Product Overview

The PCS-904 series is a digital high-voltage transmission line complete protection device incorporating full three-stage phase-to-phase distance protection, two-stage overcurrent protection, and two-stage sum-current protection. The device also includes tripping/closing operation circuits and an AC voltage switching circuit (optional for 110kV). It can be used as protection for 110kV or 220kV two-phase electrified railway power supply lines.

Product Functions

Protection Functions

Three-stage phase-to-phase distance protection

Two-stage overcurrent protection

Two-stage sum-current protection

Auxiliary Functions

Online hardware and loop detection

Fault location

Minute pulse, second pulse, and IRIG-B time synchronization

256 event reports, 64 fault recording reports

Diverse communication solutions supporting power industry standards IEC 60870-5-103 and IEC 61850

User-friendly HMI with convenient supporting debugging software and powerful waveform analysis tools