Hey all,
Had a question regarding concentric grounding terminations. We have a 138 - 25 kV delta-Yg power transformer feeding 25 kV switchgear via 3 circuits of 25 kV - 750 kcmil triplexed cable with concentric neutrals on each phase. Our standard is to have the concentric neutral tied to the...
Problem:
Have 1 existing 18 MVA (ONAN), 132:13.2kV (nominal), z = 8%, OLTC = 21 steps ±10% dy1 transformer. To supply the load, this transformer will have to be paralleled with a new transformer. The existing parallel scheme used is a "master-follower" arrangement. Typically, we order...
Hello,
Are there any technologies out there that enable one to detect a leak in buried high pressure, oil filled cable? The cable is located in an urbanized area, so a tracer-based method of locating is not feasible since there are roads, parking lots, sidewalks, etc in the way. I've heard...
Hello,
How does the Oil Industry detect leaks in underground pipelines? Is it strictly with the use of pressure gauges? If so, how is the exact location of the leak surmised in a long underground pipeline?
Thanks!
Hello,
Just wondering if anybody has heard of a standard for the manufacture of lead-acid batteries. We're in the process of creating a specification for lead-acid batteries for utility substation applications, and I would like to reference an accepted standard for the manufacture /...
