home

Recent Forum Posts

We completed a boresonic inspection on one of the applicable generator rotors earlier this year. The mechanical contractor charged...
Thursday, December 18, 2014 09:43 AM
Alliant Energy in Iowa had a 250 MW Westinghouse and a W351 (not sure of the model number) combustion turbine...
Thursday, December 18, 2014 06:09 AM
Eric, it seems that DCR could not get satisfactory grounding conditions (note the voltage difference between the neutral and ground). There...
Tuesday, December 16, 2014 07:33 PM
I would also suggest you refer to another forum posting: Search hydro generators, then other issues and then strange...
Tuesday, December 16, 2014 03:26 PM
Gigih: Looking at the images of the couplings, I would guess that magnetic based drills have been used to...
Monday, December 15, 2014 12:52 PM
Is it a new GVPI machine? What is rated voltage? When the IR of one phase is 1 M ohm,...
Thursday, December 11, 2014 09:06 AM
Eric presented a couple of good possibilities. If this unit was refurbished with a new core and winding identical to the...
Thursday, December 11, 2014 03:01 AM
The test should have been stopped at 12 kV. The initial slope appears to be somewhat minimal indicating the...
Thursday, December 11, 2014 02:54 AM
Yes that is a excellent case of slot PD eating away the conductive coating on the stator bars. Bad choice...
Wednesday, December 10, 2014 08:43 PM
I would like to clarify my comment posted on 12/3/14. I stated that " PF is of little value....
Tuesday, December 9, 2014 02:09 AM
Terms of Use
National Electric Coil
Register to be a Member Forgot Password? Terms of Use Privacy Policy