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 V321 is there to act. Schneider Electric’s Vamp arc flash mitigation range is a pioneer in its field with close to 15,000 systems installed globally.

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

Key Features of the V321:


  • Modular structure for enhanced performance and functionality
  • PC configurable
  • Event logs, disturbance recording and real-time clock for pre and post fault location analysis
  • High speed output, HSO: 2 ms (typically)
  • Trip contact, T: 7 ms (typically)
  • Operation on simultaneous current and light or on light only
  • Informative display
  • Communication with SCADA
  • Four normally open trip contacts (option)
  • One normally open and one change over alarm contact
  • Programmable operation zones
  • Continuous system self-supervision
  • Circuit breaker failure protection (user configurable)
  • Compatible with existing Vamp systems
  • Engineered for the most demanding environments
  • Technology developed in cooperation with customers
  • 5 communication ports



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