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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Das, J.C. |
| Copyright Year | 1972 |
| Abstract | Based on the results of the short-circuit calculations in Part I of this paper, the calculation of the arc-flash hazard in dc systems is demonstrated. Much like ac systems, the arcing currents are not the same as the short-circuit currents. The National Fire Protection Association 2012 methodology recommends that the arcing current be taken as 50% of the calculated dc short-circuit current and that the arc-flash hazard be calculated for a time duration of 2 s. Both these concepts are much flawed and will give inaccurate results. It is also imperative to appreciate the short-circuit protection in dc systems. Semiconductor devices have very little energy let-through withstand capability and are protected with fast-acting semiconductor fuses or dc circuit breakers that may arrest the prospective short-circuit current and limit the incident energy release to a small value. This paper calculates the arc-flash hazard in specimen cases to demonstrate the methodology of the calculations in low-voltage and medium-voltage dc systems. |
| Sponsorship | IEEE Industry Applications Society |
| Starting Page | 1698 |
| Ending Page | 1705 |
| Page Count | 8 |
| File Size | 1104206 |
| File Format | |
| ISSN | 00939994 |
| Volume Number | 50 |
| Issue Number | 3 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-01-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | incident energy and arc flash hazard in DC low-voltage and medium-voltage systems Arcing current in DC systems DC circuit breakers and fuses calculation of arcing time incident energy and arc-flash hazard in dc low-voltage (LV) and medium-voltage (MV) systems Arcing current in dc systems dc circuit breakers and fuses |
| Content Type | Text |
| Resource Type | Article |
| Subject | Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering |
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