My employer is interested in finding out how to get a component listed as UL & CSA 508 compliant. We are not familiar in any capacity with the requirements or process to achieve this type certification. We have some opportunities in the motor drive market but don't know what kind of issues...
One of our guys found a 5 kva 480V/60Hz to 115V/400Hz generator in a loft and decided to energize it after at least 15 years. To our amazement it fired up and supplied voltage on the output. The motor is a Delco model B-612A, 7.5HP. The generator is a Bogue Electric Mfg. Co. Model 2082...
Magnetic specialists,
I'm curious if anyone has tried to simulate 3-phase transformer inrush in the Finite Element world. I'm currently learning to use the software on the fly and am finding there are a lot of tricks to be learned in order to see the simulation work (and make sense).
If...
I am interested in seeing differences in excitation current of a standard transformer (Delta or Wye primary)to that of an extended delta unit.
Additionally I want to investigate any differences between a 3-leg transformer and a 5-legged unit under inrush and short circuit conditions.
If...
Hi everyone. I'm up in Northeast US and have the opportunity to go on a GE wind farm / factory tour tomorrow.
Is there anything in particular to pay attention to? I'm mainly interested in the magnetics and conversions to the grid, but I have no familiarity with the systems.
I've heard...
I have a drawing dating back to 1963 for a metallic can that calls for NETIC S3-5 material to be used. I see that NETIC S3-6 is available through MAGNETIC SHIELD CORPORATION but there is no mention of the NETIC S3-5 material.
Since I'm not familiar with either material I'm not sure if the...
I'm looking at a customer spec that asks for a specific Commutating Impedance and Through-fault Impedance. It is for a 12 pulse transformer-rectifier application. I think commutating impedance would be the leakage inductance and copper losses in the transformer. I would imagine through-fault...
The Metglas cores we are using in our transformer assemblies are flaking (delaminating and breaking off) due to handling while we build the transformer. I would like to coat the surface of them to prevent this from happening. I have a sample of Dolph AC-46 air dry varnish on the way to try...
Does anyone have information about semiconductive materials avaiable for use on transformer core steel (or Metglas in this case)? I am hoping that if i use this type of material on the edge of the core i can increase its effective radius to improve performance. My company isn't familiar with...
A customer is asking about the inductance seen from the output terminals of a transformer rectifier system. It is a 24 pulse-rectifier comprised of 4 phase shifted parallel diode bridges. We use 3 interphase transformers to obtain 24 pulse operation. There also is an output inductor. I am...
