Chapter 7

Thermal Generating Plants

7.1 Plant Auxiliary System 7-2

Selection of Auxiliary System Voltages • Auxiliary System Loads • Auxiliary System Power Sources • Auxiliary System Voltage Regulation Requirements

7.2 Plant One-Line Diagram 7-3

7.3 Plant Equipment Voltage Ratings 7-3

7.4 Grounded vs. Ungrounded Systems 7-3

Ungrounded • Grounded • Low-Resistance Grounding • High-Resistance Grounding

7.5 Miscellaneous Circuits 7-4

Essential Services • Lighting Supply

7.6 DC Systems 7-4

125 V DC • 250 V DC

7.7 Power Plant Switchgear 7-4

High-Voltage Circuit Breakers • Medium-Voltage Switchgear • Low-Voltage Switchgear • Motor Control Centers • Circuit Interruption

7.8 Auxiliary Transformers 7-6

Selection of Percent Impedance • Rating of Voltage ...

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