IEEE Std 1100-1999, IEEE Recommended Practice for Powering by Inst of Electrical & Electronics Engineers

By Inst of Electrical & Electronics Engineers

Incompatibilities among strength method features and kit tolerances have brought on working difficulties and lack of productiveness in all types of energy systems-putting facility engineers and method designers within the highlight to supply potent and effective recommendations. A key point to formulating any answer is the cooperative attempt, between strength approach designers, gear brands, and the electrical utilities, to supply and continue an appropriate point of load/source compatibility. IEEE Std 1100-1999, steered perform for Powering and Grounding digital gear, offers strong engineering perform that may be utilized within the improvement of those suggestions.

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41-1991. One aspect that many protection strategies do not address is the significance of the rate of change in voltage disturbances. This rate of change is important in two aspects: a) A fast rate of change has greater capability of producing a disturbance in adjacent circuits by capacitive and inductive coupling; and b) A slow rate of change can make ineffective a protective device based on inserting a series inductance in the power line. Detailed analysis of the rate-of-change issue is beyond the scope of this chapter, but Figure 3-9 takes the concept one step further in identifying the issues.

To help resolve the confusion, IEEE Std 1159-1995 provides unique definitions for each type of disturbance. The results of this effort, however, will take some time to be generally recognized and accepted. In the meantime, terms used by different authors might have different meanings, leaving on authors the burden of defining their terms and leaving for readers the burden of being alert for possible ambiguities. One example of such ambiguities occurs when attempting to summarize data from different surveys.

That prevailing directive is precisely the purpose of the NEC, and correct application of the NEC articles does not prevent satisfactory operation of properly wired and grounded installations. If any adaptations have to be made for the system to operate satisfactorily, the equipment manufacturer must incorporate them in the equipment design, rather than ask for deviations from the NEC. 1 General discussion Power systems operate with a constant line voltage, supplying power to a wide variety of load equipment.

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