Chapter 30

Distribution Short-Circuit Protection

30.1 Basics of Distribution Protection 30-2

Reach • Inrush and Cold-Load Pickup

30.2 Protection Equipment 30-5

Circuit Interrupters • Circuit Breakers • Circuit Breaker Relays • Reclosers • Expulsion Fuses • Current-Limiting Fuses

30.3 Transformer Fusing 30-19

30.4 Lateral Tap Fusing and Fuse Coordination 30-23

30.5 Station Relay and Recloser Settings 30-24

30.6 Arc Flash 30-25

30.7 Coordinating Devices 30-29

Expulsion Fuse–Expulsion Fuse Coordination • Current-Limiting Fuse Coordination • Recloser–Expulsion Fuse Coordination • Recloser–Recloser Coordination • Coordinating Instantaneous Elements

30.8 Fuse Saving versus Fuse Blowing 30-34

Industry Usage • Effects on Momentary and Sustained Interruptions ...

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