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 FIGURES
FIGURE NO.
TITLE
PAGE
1-1
Typical Electric Power Generation, Transmission, and Distribution System.............. 1-1
1-2
Typical Distribution Substation Arrangements............................................................ 1-5
1-3
Typical Bus Arrangements........................................................................................... 1-7
1-4
Four Primary Feeder Arrangements............................................................................. 1-8
1-5
Conventional Simple-Radial Distribution System....................................................... 1-11
1-6
Expanded Radial Distribution System......................................................................... 1-11
1-7
Primary Selective Distribution System........................................................................ 1-12
1-8
Loop Primary-Radial Distribution System................................................................... 1-12
1-9
Secondary Selective-Radial Distribution System......................................................... 1-14
1-10
Secondary Network Distribution System..................................................................... 1-14
1-11
Secondary Banking Distribution System..................................................................... 1-16
1-12
Engine Generators (Parallel Operation)....................................................................... 1-20
1-13
Peak Load Control System........................................................................................... 1-20
1-14
Combined Utility-Generator System............................................................................ 1-20
1-15
Rotating Flywheel No Break System........................................................................... 1-24
1-16
Nonredundant UPS System.......................................................................................... 1-25
1-17
Nonredundant UPS System with Static Bypass........................................................... 1-25
1-18
Redundant UPS System............................................................................................... 1-26
3-1
Delta-Wye..................................................................................................................... 3-8
3-2
Wye-Delta..................................................................................................................... 3-8
3-3
Wye-Wye...................................................................................................................... 3-9
3-4
Delta-Delta.................................................................................................................... 3-9
3-5
Zigzag........................................................................................................................... 3-10
3-6
Open-Delta................................................................................................................... 3-10
3-7
Scott Connection (Three-Phase to Two-Phase Transformations)................................ 3-11
3-8
Six-Phase Star (Three-Phase Delta to Six-Phase Star Connection)............................. 3-11
3-9
Zigzag Three-Phase Grounding Transformer.............................................................. 3-15
3-10
Bypass Switching Arrangement for Single-Phase Voltage Regulator........................ 3-20
3-11
Three-Phase Vacuum Loadbreak Switch (Reproduced Courtesy of
McGraw-Edison Company).............................................................................. 3-24
3-12
Circuit Breaker Arc Chute Interruption.(Reproduced Courtesy of
Westinghouse Electric Corporation)............................................................... 3-28
3-13
Padmounted Vacuum Circuit Breaker (Reproduced Courtesy of
McGraw-Edison Company)............................................................................. 3-30
3-14
Low-Voltage Metal-Enclosed Air Circuit Breaker Switchgear
(Reproduced Courtesy of Westinghouse Electric Corporation)...................... 3-32
ix
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