We have a 100 KVA three phase brushless alternator in our shop for repair. One of the diodes on the rotating ring needs to be replaced. The diodes have no identification markings on them-either worn off or never existed. The excitation voltage is 46 volts, and 2 amps current. Would a 50 volt...
Hello all. We have 10 identical brake motors in our shop for bearing change and clean ups. All the windings are factory, all surge test good etc. When we run test motors here, we use a soft start system. The system starts at 200v the ramps to 480v in aprox 10 seconds. When we did our final...
A motor shop I worked at years ago had a customer that required this test. A good VPI winding had no problem passing the test, the only extras involved were a post test steam and bake to remove the water from the test. The water was treated with a wetting agent to reduce the surface tension...
The test sets we are looking at are 1250 kVA, 7200vac max output voltage. We would be testing up to 6000 HP no load. When the sales rep was asked about the SCR regulation, he believes it to be a reactor, but wasn't sure. He is checking with the factory. I guess the rep gets the same data...
My company wishes to buy a high power electric motor test set. The major players provide a choice of regulation:SCR or variable transformer. My question for the experts, which is better? Pros and Cons?
Thank you for your input.
Bill
Hello all-
We have received into our shop a 500hp vertical pump motor. Allis Chalmers 15HS frame, 240 rpm. Upper thrust and guide bearing assembly is Kingsbury tilting pad type. Lower guide bearing is the one in question. Motor came in due to lower guide bearing failure. We could not...
Google "Schnabel Railcar". I know Detroit Edison has used this type of railcar for transporting transformers in the past. I have seen such a car in use in the Cleveland area. The car itself had the GE logo on it.
Thank you for your feedback. My application will be on an ID fan for a baghouse in a steel mill. Exposure to the weather will probably be the biggest concern.
Thanks again,
Bill
I am familiar with Pdma Corp MCE tester, now my company wishes to purchase a Reliability Direct All Test Pro. It is much less expensive than the MCE. Does anyone know if it is any good? We test polyphase motors up to several thousand HP. It appears that this tester is only good for small...
Kone Cranes of Finland have used conical rotor motors similar to Demag. It has been a while since I have seen any. The braking scheme was different as I recall.
