HerrKaLeun: Thanks for your feedback. IR has been attempted in the past, but I am not sure of the quality of the camera used. I will have to check into the use of expansion loops.
RossABQ: Thanks for your feedback as well. They are Victaulic brand couplings. RMF? I am unfamilar with the...
Twice within the last 5 years at two different data centers we have had a bolt fail on a Victaulic coupling of our chilled water piping. Both failures resulted in massive leaks and water damage. Luckily the damage was not to the data center floor itself, however similar piping is used under...
Is there a requirement or guidline for performing a new coordination study/short circuit analysis when a facility's existing electrical system has had changes and additions made to it? While I assume it is best practice to do this, is there a section of the NEC, NFPA, or IEEE standard that...
Many companies are fond of wanting/needing the building to be electrically active long before construction is completed. I am trying to develop a standard for our electrical contractor for the manner in which electrical equipment is to be left when the building is handed over to the owners. Is...
We haven't upgraded to a VR6 yet. That may be the next step if another VR3 fails. Good to know that we will want to upgrade them all at the same time. Thanks.
I tried to see if this question had already been answered, but did not find it specifically. I would like to know if there are any requirements for the qualification of persons performing an arc flash study such as PE, special certification,etc.
Thanks for all the information. We are having our Russelectric and CAT technicians out this week to collaborate on the issue. I will definitely look into all the points you brought up. Thanks again!
I work at a data that is backed up by 3 CAT 3516 diesel engines with SR4 generators and VR3 voltage regulators. Two years ago in our 2nd generator we experienced a voltage regulation issue that was resolved by replacing the voltage regulator. We are now again having voltage regulation...
Also the problem with the ATS's is that there are continuing to heat up, even though they have been replaced, so there is still something going on to cause this. Possibly circulating currents or other issue due to improperly connected systems that would also give strange readings at other...
I am not concerned that there is current at 180 Hz. Harmonics, especially 3rd harmonics, are typically found in the neutrals servicing non-linear loads. What does concern me is that what the meter appears to show is a 175 to 180 Hz fundamental freqency in only some of the neutrals on each...
I am a data center technician for a financial company in St. Louis, MO. I have my EIT certification and along with my other duties am involved in various projects throughout the company's St. Louis campuses. I was recently asked to perform some basic harmonic analysis at one of the large...
