Thanks for your comments.
The buildings have a 12,470 volt 3-phase ungrounded delta overhead distribution (no neutral or static line) coming to a service pole (They each have their own service). The service poles have three single phase cans connected delta-delta and most of them have 75 kva...
I am wanting to convert it to a corner grounded delta system so that an overcurrent protective device can be persuaded to trip in the event of a phase to ground fault. We just recently experienced a situation where a 3-phase motor had a phase to ground fault occur and we had all sorts of wierd...
My installation has several buildings that have ungrounded delta 480 volt 3-Phase systems. Has anyone had any experience in converting the ungrounded delta system to a corner grounded? Is it safe to do it? How is the best way to accomplish it?
I have been a facility engineer with similar type applications. We did not neccesarily experience hard drive failures (but I would not rule them out), but we did experience a lot of data corruption. The problem that we had was grounding. The isolated ground from the UPS system was connected...
I used to work at an airbag manufacturer. BIGRED1 gave som e good toxicology data. There are some other bad actors in the ignition train that should be avoided. Because 2 of the actors in the ignition train are very static sensitive, I would suggest leaving them alone.
I have an application for a rechargeable battery. My question is, which is the better technology--the rechargeable Lithium or the Nickel Metal Hydride? Is one or the other preferable for rechargeability? for current density? for discharge voltage characteristics?
Thanks
