Many arc flash faults start as single-phase-to-ground faults and then develop into three-phase faults. This is why an early detection of the arc fault and fast fault isolation is needed. When a traditional time characteristic or blocking based coordination principle is used within a relay to mitigate arc flash, it may not be able to trip a breaker quick enough to effectively mitigate the damage caused by the release in incident energy. A high impedance earth fault typically has small current levels leading to extended clearing times and significant release of arcing energy.
Modern society heavily depends on an uninterrupted supply of electric power. Prolonged power outages cause loss of business to the power supplier and loss of production to the power consumer. Regardless of how rigorous a power system is, faults do occur. When they do, Schneider Electric’s new V321 is there to act. The V321 is an arc flash mitigation system that is used for a Low Voltage and Medium Voltage distribution systems to increase personnel safety and decrease damage to an installation.
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