Current protection relay PCS-9671

over-excitationIECprogrammable

PCS-9671 is a compact numerical relay for two-winding transformers. It can be utilized for reactor or stub-bus current differential protection. It also can be used to protect reactors or implemented as a stub current differential protection in a oneand- a-half breaker arrangement. The restraint current differential protection, unrestraint differential protection and restricted earth fault protection are provided. Comprehensive flexibility is provided via the modular hardware design, scalable function library, programmable logics, configurable I/Os and definable LEDs. This allows users to create customized schemes for specific projects. Two fixed LEDs and 18 configurable 3-color LEDs (Green/Yellow/Red) are provided. The relay is compatible with IEC 61850 station bus and process bus applications. It supports IEC 61850-8-1 MMS, GOOSE and IEC 61850-9-2 Sampling Value. The RJ-45 faceplate port is implemented in effort to make testing, setting, commissioning and maintenance easier. • Restraint current differential protection. (87T) • Unrestraint current differential protection. (87UT) • Restricted earth fault protection (64REF) • Inrush current blocking by 2nd and 3rd harmonic • Overexcitation blocking by 5th harmonic • CT saturation detection • Phase overcurrent protection (50/51P) • Zero sequence overcurrent protection (50/51G) • Negative sequence overcurrent protection (46) • Thermal protection (49) • Undervoltage and overvoltage protection (27/59) • Zero sequence overvoltage protection (59G) • Negative sequence overvoltage protection (47) • Overexcitation protection (24) • CT circuit supervision. (CTS)