As shown in the illustrated 3 phase...

Question 1 / 205eccefa4bacbc34ba4d4823a

Question 1 of 205eccefa4bacbc34ba4d4823a

As shown in the illustrated 3 phase synchronous motor controller, what statement is true regarding motor start-up? See illustration EL-0135.

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Question 1 of 20

5eccefa4bacbc34ba4d4823a

As shown in the illustrated 3 phase synchronous motor controller, what statement is true regarding motor start-up? See illustration EL-0135.

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🔍 Key Concepts

• Trace when the field contactor (FC) actually energizes the DC field in the circuit. • Look at whether any reactors or resistors are placed in the three‑phase stator lines (L1, L2, L3) for reduced‑voltage starting. • Recall how a 3‑phase synchronous motor normally accelerates from standstill to near synchronous speed.

💭 Think About

• From the diagram, is DC applied to the rotor field immediately when the main contactor M closes, or only after another relay/condition is met? • Are the reactor and current‑limiting resistor connected in the AC stator supply path, or only in the DC field circuit? What does that tell you about reduced‑voltage starting claims in the choices? • How do amortisseur (damper) windings help a synchronous motor get up to speed, and which choice describes that method?

✅ Before You Answer

• Verify where the FC contacts are located in relation to the DC supply and the motor field (F1–F2). • Check if any devices are in series with L1, L2, L3 that would reduce stator voltage at start (reactors or resistors). • Confirm which option correctly describes a common starting method for synchronous motors, compared to what you see in the diagram.

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Question 1 of 20

As shown in the illustrated 3 phase synchronous motor controller, what statement is true regarding motor start-up? See illustration EL-0135.

DC is applied to the motor field at the instant of start-up and the resulting field current is used to accelerate the motor up to speed

the motor is started at reduced voltage using primary reactors

the motor is started as an induction motor using amortisseur windings in the rotor

the motor is started at reduced voltage using primary resistors

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Question 1 / 205eccefa4bacbc34ba4d4823a

Question 1 of 205eccefa4bacbc34ba4d4823a

As shown in the illustrated 3 phase synchronous motor controller, what statement is true regarding motor start-up? See illustration EL-0135.

Back

Question 1 of 20

5eccefa4bacbc34ba4d4823a

As shown in the illustrated 3 phase synchronous motor controller, what statement is true regarding motor start-up? See illustration EL-0135.

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

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed