When and how to specify arc flash protection relays
ATTENDEES QUALIFY FOR A CERTIFICATE OF COMPLETION.
Arc flash incident energy reduction during a short circuit event will lower the possibility of personal injury and equipment damage.
One of the recommended methods of arc flash mitigation offered in NFPA 70: National Electrical Code Article 240.87 is an “energy-reducing active arc flash mitigation system,” which is based on optical arc detection.
Performance of optical arc-detection method depends on multiple factors, such as sensor sensitivity and proper placement, fault current detection, a combination of light and current signals and effective signaling to achieve correct selectivity.
This session will review:
- Effects of an arc fault
- The importance of high-speed detection and fault clearing time
- Sensor performance
- Zone selection practice
- A sample case incident and root cause analysis
- Understand the effects of arc flash and the importance of clearing time.
- Learn about electrical sensor placement, performance and capabilities.
- Apply the concept of light and current to different zones.
- Review site experience and fault analysis.
Farhad Moslemi, PEng, Principal Application Engineer, Energy Automation Business, Schneider Electric
Amara Rozgus, Content Manager, CFE Media and Technology