SCHNEIDER ELECTRIC MICOM P127 Overcurrent and earth fault protection relay

SCHNEIDER ELECTRIC MICOM P127 is a multifunctional numerical protection relay designed for medium voltage feeder protection in power distribution systems. This numerical protection relay integrates phase overcurrent, earth fault, voltage and frequency protection functions. The numerical protection relay supports both directional and non-directional operation modes for flexible grid configuration. The numerical protection relay records fault event logs and waveform capture for post-fault analysis.

Overcurrent protection is the core function of SCHNEIDER ELECTRIC MICOM P127. Overcurrent protection adopts IDMT and definite time characteristics to detect overload and short-circuit faults. Reliable Overcurrent protection isolates faulty circuits rapidly to safeguard transformers and feeders. Configurable Overcurrent protection meets IEC and ANSI standards for power substation projects.

This unit delivers stable earth fault protection for ground leakage fault detection. earth fault protection identifies earth faults and triggers trip or alarm commands according to user settings. Robust earth fault protection reduces equipment damage and personnel safety risks in power networks. Tunable earth fault protection works well for cable and overhead line distribution feeders.

SCHNEIDER ELECTRIC MICOM P127 features intuitive front HMI for parameter setup and status viewing. It supports multiple communication protocols including Modbus RTU, IEC 60870-5-103 and DNP3 for SCADA connection. It provides multi-shot auto-reclose, breaker failure detection and thermal overload monitoring. Widely deployed in power plants, substations and industrial power distribution networks. It is a trusted feeder protection device for medium voltage power systems.