If a CT has name plate Kneepoint of 750Volts. Should the measured (actual) value be Higher or lower than this figure and what is the tolerance ie 5%,10% etc
Thanks in advane
Many of the power transformers I have worked on have there core and Yoke shorted to the transformer case when in service. This is done through external links which are removable. Can any one explain to me why these links are put there - why not solidly connect the core and yoke to the chasis...
Can anyone provide information on conducting PF/DF tests on lower rated transformers. Specifically in regards to voltages and frequencies to be applied and which tests are required for a two winding transformer. (GST,GST ga, UST etc) It appears that 10KV is a recognised acceptable voltage but...
If anyone is having trouble viewing images with vanilla CAD that have been edited with Raster 2005 there is a reason. Raster 2005 has a bug that causes this problem. At the moment I have been advised the only fix if you are editing using Raster 05 is to upgrade to 2006.
Ive recently experienced some problems finding kneepoints using the CPC100. Last week i tested 60 CTs of various description and 57 of them were proven to be OK. The remaining 3 did some funny things with their saturation curve. They basically plotted a 45 degree line with a linear relationship...
Help please, I have recently been making some mods to a customers CAD files. The files contain a cad .dwg component over the top of a raster image .gp4. When I edit the raster image with raster design and try to then open the file again using plain autocad the image file is not found. When i...
Ive heard many a time that preforming AC Voltage withstand test can be damaging to Vacuum type circuit breakers. Is this true? If so to prevent damage can anyone inform me about where i can find information on testing procedures for this type of circuit breaker. The manual we recieved with our...
