Fast rewind to meet a pressing need
Requests for a quote were sent out on March 5th and due back by March 9th.
There was heavy competition, with four other bidders in play. A key concern for the client was having its deadline of May 1st met. That was something we were confident we could achieve. We were also able to save the client money by carrying out the reassembly work on a single shift.
On March 11th, the client verbally awarded us the generator rewind contract. Within just four days, we had mobilized our field service crew and subcontracted the required crane.
We fully disassembled the unit and transported the generator to our Farmington facility in New Mexico. There, we dismantled the rotor, removing the copper and stripping it back to its bare metal. We examined and corrected the failure mechanism and installed new insulation.
Once the unit was reassembled in our workshop, we performed a high-speed balance and a heat run. This allowed us to confirm there would be no recurrence of the vibration issues experienced previously on site.
The unit balanced quickly and well below industry targets of 2.5 mm/s throughout the entire speed range, from zero to 3,600 rpm. The final balance achieved was 0.5 mm/s.
We had the rotor back on site and mechanically assembled by April 28th.