LionelHultz, we have been using the raw element as you said, just the bare welded bead as well. It was not a misinterpretation, I flew to the UL Research Triangle Park Facility in Raleigh North Carolina and worked with both the PDE and our Project Engineer. They did not understand why we were...
No were did I claim to be an engineering professional, in fact I am quite the opposite, hence why I am on here asking questions rather than answering them. You do have the right to tell the truth, however you do not have the right to tell a person who is looking for help what kind of questions...
Gunnar England, no need to be rude. I simply was looking for advice, and for your information Underwriters Laboratory would argue against your point. That was the first thought to cross our minds when analyzing the test criteria. We asked their Principal Design Engineer and he responded that...
Bill, we are testing electrical connectors. We have to apply a specified current from the UL 486A - 486B standard depending on the conductor size used with the connectors. We then have to watch temperature rise until we reach a steady state temperature of the connectors. The connectors cannot...
Yes I have attached the schematic of the test loop. http://files.engineering.com/getfile.aspx?folder=64229c89-0773-4dd2-b197-9c1cee462ecc&file=test_rack_with_6_connectors.pdf
I have a problem with our thermocouples jumping the temperature readings either extremely high or low as soon as we apply a current to the test loop. Once the current is shut off the TC's go back to normal measurements. I was at a lab and they had grounded a part of their transformer to avoid...
Hi Keith,
Thank you for your reply,
Yes I understand that the meter may not be reading properly. I am not sure what our meter is reading whether it is average or RMS. It is a Flir CM174. I know that the power source we are using has three phase 480VAC input and produces a rectified DC...
Thank you for your response ScottyUK, as of right now we have been using a 100% duty cycle 600 amp DC welder as our power source. The problem we have been facing is when we measure the current at 300 amps we are getting very different temperature readings at steady state on our connectors than...
Hi I am with a company based in Idaho called Melni LLC. We make innovative electrical connectors for the industry. Currently we are starting to build our lab to test our connectors in house. I need some assistance on what kind of transformer and other equipment we may need to test properly. We...
