As shown in figure "B" of the illustrated...

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Question 1 of 205eccefa4bacbc34ba4d48387

As shown in figure "B" of the illustrated manual secondary resistance motor controller, at how many operating speeds does the motor run from start-up to rated speed? See illustration EL-0144.

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5eccefa4bacbc34ba4d48387

As shown in figure "B" of the illustrated manual secondary resistance motor controller, at how many operating speeds does the motor run from start-up to rated speed? See illustration EL-0144.

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🔍 Key Concepts

• Wound-rotor induction motor speed control using secondary (rotor) resistance • How each step of starting resistance in the rotor circuit creates a different operating speed as resistance is cut out • Relationship between the number of resistance stages and the number of distinct speeds from standstill to rated speed

💭 Think About

• Count how many different resistance conditions the rotor sees as the controller operates from start to full speed. Does the rotor ever run with: (1) full resistance, (2) some resistance removed, and (3) no resistance? • Look carefully at figure B: how many separate groups or "steps" of starting resistors are there in the rotor circuit, and how many times can the controller change from one step to the next? • For each change in rotor resistance, ask yourself: does this produce a new stable speed before the next step is taken?

✅ Before You Answer

• Identify clearly how many distinct resistor banks/steps are shown in the rotor circuit on the right side of figure B. • Decide whether rated speed corresponds to the condition with all rotor resistance cut out (direct rotor connection). • Verify that you count each unique resistance configuration only once when determining the number of operating speeds.

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Question 1 of 205eccefa4bacbc34ba4d48387

As shown in figure "B" of the illustrated manual secondary resistance motor controller, at how many operating speeds does the motor run from start-up to rated speed? See illustration EL-0144.

Back

Question 1 of 20

5eccefa4bacbc34ba4d48387

As shown in figure "B" of the illustrated manual secondary resistance motor controller, at how many operating speeds does the motor run from start-up to rated speed? See illustration EL-0144.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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