Two identical fans were tested for motor inrush current. One motor would trip after taking too long

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Two identical fans were tested for motor inrush current. One motor would trip after taking too long to achieve full speed, whereas the other motor exhibited no issues. See below:

image text in transcribed

Current inrush on good unit.

image text in transcribed

Current inrush on faulty unit.
Other than the time required to achieve full speed, is there anything else the reader can confirm from this test?

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Rotating Machinery Reliability For Technicians And Engineers

ISBN: 271009

1st Edition

Authors: W. Ron Brook

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Question Posted: Apr 27, 2024 01:01 AM

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Two identical fans were tested for motor inrush current. One motor would trip after taking too long

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1000 900 800- 700 600 500 400 300 200 100 In Rush Start Up - EF2 01/26/2004 08:41:32 AM 0 F 2 3 4 5 8 T 8 8 10 11 12 13 14 15

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Rotating Machinery Reliability For Technicians And Engineers

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