Selective Coordination and its impact on Low-Voltage System Design & Arc Flash
Sriram S1, Anguraja R2

1Sriram S*, Department of Electrical & Electronics Engineering, DBIT, Bangalore, India.
2Dr. Anguraja R, Department of Electrical & Electronics Engineering, DBIT, Bangalore, India.
Manuscript received on July 23, 2020. | Revised Manuscript received on August 05, 2020. | Manuscript published on August 10, 2020. | PP: 437-440 | Volume-9 Issue-10, August 2020 | Retrieval Number: 100.1/ijitee.J76010891020 | DOI: 10.35940/ijitee.J7610.0891020
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Abstract: This paper focuses on total selective coordination of low voltage systems for critical facilities and based on reliability requirements. Critical facilities which include Data Centres, Health Care Facilities & Emergency Systems. It also discussed the importance of achieving total selective coordination and the impact on network design and how it is related to arc flash incident energy. It also states the National Electric Code requirements for the implementation of selective coordination based on system reliability requirements. The difficulties in achieving selectivity from Grid side and an inhouse generation side and the reliability benefits on critical facilities are discussed. 
Keywords:  Selectivity, Dynamic Impedance, ATS, Critical Facility, NEC, Coordination, TCC, Bolted fault current, Electrode configuration, Arc flash.
Scope of the Article: Digital System and Logic Design