Arc Flash Study - EMC Corporation
EMC requested we conduct an arc flash study at their plant. Our engineers came to site and conducted a full survey of the electrical infrastructure including MV/LV equipment, power transformers, backup generators, motors, cables and protection equipment.
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Arc Flash Consultants
We took all the information gathered to calculate the arc flash values in Cal/cm2 for every point in the network according to IEEE1584. This helped inform the client of the high arc flash areas of the plant, and where extra precautions were required when carrying out live work. We then provided recommendations on how to mitigate against these high levels.
The EMC site is quite a large installation, with almost 300 boards to be assessed. A careful evaluation of current onsite documentation was required to ensure there were no gaps and the model could be built accurately. Much of the onsite protection equipment is old, requiring specialised power system modelling capabilities.
Through the expertise derived from our years of experience, we were able to bring all onsite arc flash levels to below 8 Cals/cm2. We achieved this through protection coordination settings changes and the specification of certain hardware changes. The recommended mitigation was implemented and the results are a safer electrical installation for all affected onsite personnel. We also recommended the wearing of non-intrusive arc flash PPE for electrical workers.