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Listening Quiz: Phân Tích Sóng Hài Cho Việc Lắp Đặt Biến Tần – Advanced Level
Th7 14, 2024
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Kỹ sư điện (English for Electrical Engineer)
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1.
What is the main topic of William and Emma’s conversation?
Choosing a new variable frequency drive for the building
Discussing harmonic analysis for a variable frequency drive installation
Training Emma to use a harmonic analyzer for electrical testing
Repairing equipment that has already failed because of overheating
Explanation:
The conversation focuses on harmonic analysis related to installing a variable frequency drive, including risks, standards, measurement, and mitigation.
2.
According to William, what can the variable frequency drive create in the system?
Mechanical vibrations
Harmonics
Voltage surges
Power outages
Explanation:
William says, “The variable frequency drive can create harmonics in the system.”
3.
What standard does William say should be followed for harmonic limits?
NEC 70
ISO 9001
ANSI C84.1
IEEE 519
Explanation:
William states that “IEEE 519 is the main standard for harmonic limits.”
4.
Why does William emphasize continuous monitoring?
To help prevent future problems caused by harmonics
To replace the need for a harmonic analyzer
To make the drive manufacturer responsible for all testing
To avoid using any filters in the system
Explanation:
William says that continuous monitoring helps prevent future problems, which implies it is important for catching or avoiding harmonic-related issues early.
5.
What will William and Emma prepare at the end of the conversation?
A manufacturer comparison chart
A harmonic study report
A list of equipment to replace
A maintenance schedule for the drive
Explanation:
William concludes by saying, “Let’s prepare the harmonic study report.”
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