Minimum Distribution System Concepts and Applications

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Distribution Pole Classification Conclusion On Pole Class • The physical sizes and weights of line transformers and wires are related to their current carrying capabilities. • Pole class must be increased (i.e., going from 7 to 1) to carry heavy mechanical loads caused by large line transformers and conductors (3Φ lines are indicative of greater electrical load density than 1Φ lines). • Thus, pole class is predominantly a function of load. 40
Pole Capacity Poles have no electrical capacity component, but they do have a mechanical capacity (strength) component that can be viewed as a proxy for electrical loading. Pole class (or circumference) can represent loading capability for wood poles, but it does not work for steel or concrete poles since different classes can have the same physical dimensions. Ground line moment capacities do differ by class for all poles. Example: 35’ 5-C Pole Transverse Wind Load of 1,200 lb GLMC = 33,000 ft-lbs = 33 kips 41
Page 1 and 2: MINIMUM DISTRIBUTION SYSTEM CONCEPT
Page 3 and 4: Basic Cost Components The classific
Page 5 and 6: The Access Function Of The Distribu
Page 7 and 8: Distribution System Lines and Facil
Page 9 and 10: Customer or Demand 9
Page 11 and 12: Customer or Demand 11
Page 13 and 14: Protection Scheme Permanent Fault C
Page 15 and 16: Customer or Demand
Page 17 and 18: Zero-Intercept Methodology Applied
Page 19 and 20: Weighted Linear Regression For Dist
Page 21 and 22: Zero-Intercept Analysis The Problem
Page 23 and 24: Primary and Secondary Conductors an
Page 25 and 26: Weighted Linear Regression For Dist
Page 27 and 28: Determination Of Overhead Circuit L
Page 29 and 30: CONDUIT FOR UNDERGROUND CABLES RIGI
Page 31 and 32: Pole Heights Relative Frequency Dis
Page 33 and 34: Clearance Requirements Poles lines
Page 35 and 36: Distribution Pole Classification Co
Page 37 and 38: Standard Pole Classes Example: 35
Page 39: Pole Class Requirements Based On Tr
Page 43 and 44: Zero-Intercept Example Wood Poles 1
Page 45 and 46: Example MDS Analysis Results Distri

Minimum Distribution System Concepts and Applications

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