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Standards Development Working Group

1806 WG - P1806 Working Group

The purpose of this guide is to provide criteria for placement of switching and protective device placement for distribution circuits. The scope covers feeder and branch line equipment. Drivers for device placement, such as reliability and operational considerations are identified. All types of switching and overcurrent (OC) equipment are covered including: • Manual switches • Automated switches • Load break vs. non-load break • Reclosers / Sectionalizers • Fuses (Overcurrent and Current Limiting) • Distribution Automation (DA) device control. A section on predictive reliability calculations for feeders is included to provide a guideline for predicting reliability of circuits vs. device placement and number or frequency of devices. Issues such as fault rate, exposure miles, customer density are discussed and their impact on reliability and device placement addressed. The impact of Distribution Automation equipment and automated sectionalizing equipment and the impact on feeder reliability are also addressed. The net result is to provide means and methodologies for proper placement of switches and protective devices to achieve the desired performance characteristics for a distribution circuit.
  • Status: Active Standard Help
Working Group Chair: Charles Williams

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