Attempting to parallel an AC generator which...

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Question 1 of 205eccefa4bacbc34ba4d481a9

Attempting to parallel an AC generator which is out of phase with the bus will result in which of the following conditions?

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5eccefa4bacbc34ba4d481a9

Attempting to parallel an AC generator which is out of phase with the bus will result in which of the following conditions?

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🔍 Key Concepts

• Paralleling AC generators requires matching voltage, frequency, and phase with the bus before closing the breaker. • An out-of-phase connection can cause very high instantaneous currents and mechanical stress on the generator shaft and coupling. • Think about the normal purpose of synchronizing lamps and what would realistically happen to protection devices if the phase is badly mismatched.

💭 Think About

• If a generator is closed onto a live bus while out of phase, what will the immediate current and torque conditions look like—very small, normal, or extremely large? • Which device in the system is specifically intended to react to dangerous fault-like conditions when closing a breaker out of phase? • Among the choices, which effects are plausible short-term protection responses, and which sound like long-term or gradual operating conditions (like kVA changes or power factor changes)?

✅ Before You Answer

• Verify what synchronizing lamps actually indicate and whether they are designed to be sacrificial (burn out) or just indicators. • Consider what standard generator protection is set up to do when it detects extreme mismatch or fault-like current on closing. • Check whether power factor would instantly become perfect (unity) when you make a serious synchronizing error, or whether that sounds unrealistic.

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Question 1 of 205eccefa4bacbc34ba4d481a9

Attempting to parallel an AC generator which is out of phase with the bus will result in which of the following conditions?

Back

Question 1 of 20

5eccefa4bacbc34ba4d481a9

Attempting to parallel an AC generator which is out of phase with the bus will result in which of the following conditions?

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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