February 27, 2017
This is an electric motor repair case study on a 800HP, 900RPM, 4000V Coal Crusher Motor for a Midwest-US based coal fired power generation plant. In 2006 the utility came to HECO after years of repetitive failures circling around the electric motor’s rotor. This was originally presented at the Reliability, Process, and Maintenance (RPM) Symposium on Sep 13-14, …
November 1, 2016
Before reading this article – be sure to first read the first and second articles in this case study series. The results of the “on-site” findings in conjunction with the “in-shop” inspection led to the electric motor repair approval to build a new rotor assembly for this Boiler Feed Pump Motor (9000HP, 1800RPM, 13,200v, Siemens …
October 24, 2016
Before Reading – Please see the first article in this Case Study Series: “On-Site Findings.” The results of the “on-site” findings resulted in the determination to pull this Boiler Feed Pump Motor (9000HP, 1800RPM, 13,200v, Siemens Allis) out for repair. The motor was removed and was received by the HECO motor repair shop on 3-31-2015. …
October 8, 2016
On March 09, 2015, HECO was called in to help evaluate vibration and noise concerns with a coal-fired power generation plant’s Boiler Feed Pump Motor. (9000HP, 1800RPM, 13,200v, Siemens Allis). Initial information from the plant vibration team indicated rotor related issues. Review of the data provided showed a possible rotor bar pass frequency. This is …
May 2, 2016
What’s up with motors? Motors are reliable as can be when managed and maintained properly. To a point. Then they still fail. It’s up to you to then make decisions quickly and get production running again Here’s the rub. You need to realize that the decisions made during these times can significantly impact future reliability …
March 21, 2016
“So, how long will it take?” That’s often the first question when someone sends an electric motor out for repair. Fair enough. Is it a matter of days or are we talking weeks? How long should it be expected to be out of commission? But here’s the deal. Before your repair shop answers that question, …
January 25, 2016
That seems like a simple question, doesn’t it? If I have a motor that fails, how much will it cost to have it fixed? What could be simpler? Well, while the question is simple, the answer…not so much. Before any electric motor repair shop can give you an accurate estimate, they should have some questions …
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