Power Plant Construction and QA/QC Section 4.4 – In-Plant Electrical Distribution Engineering Technology Division

2 Section 4.4 – In-Plant Electrical Distribution Overview Loads vary – 5v to 13.8 kV Vital and Non Vital loads Both AC and DC voltage Multiple Power Sources – Battery, Emergency Generators Protection Voltage Current Faults Shorts Connection – Wire and bus trays

3 Section 4.4 – In-Plant Electrical Distribution Power Plant Distribution - Concept Source 1 Transformer Switchgear Load Center Vital Load Center Transformer Source 2 Transformer Switchgear Load Center Transformer Source kV To 1,460 V To 480 V to 120 V

4 Section 4.4 – In-Plant Electrical Distribution Power Plant Distribution Transformer Switchgear Equipment Source Storage Bus Bars Wires

5 Section 4.4 – In-Plant Electrical Distribution Power Plant Distribution

6 Section 4.4 – In-Plant Electrical Distribution Switchgear – Circuit Breakers Installed 13.8 kV Circuit Breaker Removed

7 Section 4.4 – In-Plant Electrical Distribution Switchgear – Circuit Breakers Front 480 V Circuit Breaker Back

8 Section 4.4 – In-Plant Electrical Distribution Switchgear – Circuit Distribution Circuit Breaker Fuse

9 Section 4.4 – In-Plant Electrical Distribution Switchgear Bus Work Internal External 4,160 and 13,800 Volts

10 Section 4.4 – In-Plant Electrical Distribution Cable Trays 480 / 240 and 120 Volt

11 Questions? Section 4.4 – In-Plant Electrical Distribution