As shown in the illustration, if the line...

Question 1 of 270705eccefa4bacbc34ba4d4833c

As shown in the illustration, if the line voltage is 450 VAC, what would be the applied voltage to the motor after the acceleration period with the motor up to speed? See illustration EL-0012.

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Question 1 of 27070

As shown in the illustration, if the line voltage is 450 VAC, what would be the applied voltage to the motor after the acceleration period with the motor up to speed? See illustration EL-0012.

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🔍 Key Concepts

• Identify what type of starter this is (look at the transformer taps marked 100% / 80% / 65% / 50% and the contactors 1S and 2S). • Think about what happens to the motor connections during starting versus after the timer has transferred the circuit to the run condition. • Relate the percentage tap used for starting to the line voltage of 450 VAC, then compare that to what the motor sees once it is connected directly to L1–L2–L3.

💭 Think About

• When the motor is first started, which contactor (1S or 2S) is closed, and which transformer tap is actually feeding the motor? • After the acceleration period, when the timer contact 2S (TC/TO) changes state, how does the connection between L1–L2–L3 and T1–T2–T3 change? Is the motor still on a reduced-voltage tap, or now directly on the line? • If the autotransformer is bypassed in the run condition, what does that do to the voltage at the motor terminals compared to the 450 VAC line?

✅ Before You Answer

• Verify which contacts are closed in the run (up-to-speed) condition (look at the positions of 1S, 2S, and the timer contacts). • Confirm whether the motor is connected through the autotransformer taps or directly to the line after acceleration. • Only one of the answer choices equals the full line voltage of 450 VAC; the others are percentages of it. Decide whether the question is asking about starting voltage or running voltage.