Electrical Systems Analysis and Design for Industrial Plants
Irwin Lazar
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-1
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-2
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-3
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
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FIGURE 3. DOUBLE LINE TO GROUND FAULT ON UNDERGROUND SYSTEMS RESULT IN OUTAGES OF TWO CIRCUITS AND HIGH LEVEL FAULT CURRENTS CAUSING SEVERE EQUIPMENT DAMAGE
SECONDARY WINDING
BOTH BREAKERS TRIP OUT
PATH OF ELECTRICAL CURRENT
FIRST GROUND FAULT
SECOND GROUND FAULT
FIGURE 4 LINE-TO-GROUND VOLTAGES FOR A SINGLE LINE-TO-GROUND FAULT ON AN UNDERGROUND NEUTRAL SYSTEM
NUETRAL
FULL LINE-TO-LINE VOLTAGE
NEUTRAL
LINE-TO-GROUD VOLTAGE DURING FAULT (EQUAL TO FULL LINE-TO-LINE VOLTAGE
NORMAL LINE-TO-GROUND VOLTAGE GROUND POTENTIAL
A. NO FAULT SYSTEM (NEUTRAL FLOATS AT GROUND POTENTIAL
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B. SINGLE LINE-TO-GROUND FAULT ON SYSTEM (ONE LINE AT GROUND POTENTIAL
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Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-6
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-7
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-8
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-9
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
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Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
B-11
Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
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Irwin Lazar — Electrical Systems Analysis and Design for Industrial Plants
