Efficiently operating modern distribution grids necessitates the rapid detection of faults, the organization of fault messages, and provisions for further processing. Siemens SICAM FPI Short Circuit Indicator plays a crucial role in achieving these objectives. The FPI is specifically designed for detecting phase faults and earth faults in radial or open ring medium-voltage cable networks. It relies on four external current sensors to identify phase faults (L1, L2, L3) and earth faults (E). These sensors work by detecting phase fault and earth fault currents based on pre-set current threshold levels and then communicate this information to Siemens SICAM FPI using optical signals. Each sensor is equipped with a rotary switch that allows operators to configure the fault current threshold.
