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Advantages and Disadvantages of Different Types of Neutral ...

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LOW RESISTANCE GROUNDED<br />

POWER SYSTEMS<br />

400 AMP GROUNDING<br />

<strong>Disadvantages</strong><br />

• Relatively large ground fault is required <strong>and</strong> thermal damge <strong>and</strong> core<br />

restacking is possible<br />

• The faulted machine is shutdown<br />

• Starter fuse may also operate<br />

• Must trip upstream circuit breaker.<br />

• Has been replaced by high resistance grounded systems with modern<br />

ct’s <strong>and</strong> relays.<br />

<strong>Advantages</strong><br />

• 400 amp grounding does look at a large part <strong>of</strong> the machine winding.<br />

45

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