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10 Cards in this Set
- Front
- Back
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4 advantages of three phase system |
-smaller in size (1.5 times) -less copper -120° of electrical phase voltage -simpler design |
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What is Polyphase? |
More than one phase |
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What are 2 configurations of a three phase alternator? |
Wye Delta |
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What is Phase sequence |
Rhe point when each phase meets its peak |
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How do you reverse phase sequence? |
Swap 2 leads |
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4 reasons for grounding the neutral are... |
-Reduces transient overvoltages -lightning protection -easier to find ground faults -able to use better fault equipment |
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Purely resistive Delta connected systems magnitude between voltage and current is? |
30° |
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Which method of connecting capacitors for P.F. correction is prefered? Individual, large bank, or combination of both? And Why? |
Individual, reduces line loss, and heat |
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When connecting a P.F. correction capacitor directly to a motor, what is important to consider? |
Not to oversize the capacitor |
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What safety precaution must be done before working on a circuit with a capacitor? |
Wait 5 minutes! |
