Table of Contents

1 Overview
  1.1 Scope
  1.2 Purpose
2 Normative references
3 Definitions
4 Fundamentals
  4.1 Fault characteristics
  4.2 Load characteristics
  4.3 Harmonics and transients
  4.4 Interrupting ratings
5 System configuration and components
  5.1 System
  5.2 Lines
  5.3 Transformer-Distribution substation
  5.4 Protective devices
  5.5 Switching
  5.6 Instrument transformers (sensing)
6 Protective schemes
  6.1 Overcurrent scheme
  6.2 Fuse saving/blowing schemes
  6.3 Voltage scheme
  6.4 Impedance and communications assisted schemes
7 Criteria and examples
  7.1 Reach/sensitivity
  7.2 Coordination
  7.3 Clearing time
  7.4 Reclosing (79 function)
  7.5 Cold load pickup
  7.6 Adaptive relaying cold load
  7.7 Fuse saving
8 Special applications
  8.1 Parallel lines
  8.2 Automation
  8.3 Load shedding
  8.4 Adaptive relaying schemes
  8.5 Multiple faults
  8.6 Sympathetic tripping
  8.7 Distributed resources
  8.8 Communications
  8.9 Multiple source configurations
  8.10 Directional overcurrent relay
  8.11 Motors (effects of unbalance)
  8.12 Breaker failure
  8.13 Single-phase tripping
  8.14 Resonant grounding in distribution systems
  8.15 Selective ground fault protection of an
       ungrounded system
Annex A (informative) - Bibliography
Annex B (informative) - Glossary

Abstract

Talks about the application and coordination of protection for radial power-system distribution lines.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Supersedes	IEEE DRAFT C37.230 : D4.0 2006