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SDR - Software Defined Radio / Re: Requesting an SDR Recording of WWFD-AM Radio, Frederick MD
« on: June 15, 2021, 0738 UTC »
Hi.... I've never seen a 240V Three-Phase framework introduced ungrounded. I've worked with 480V ungrounded frameworks a considerable amount and just know about one catastrofic disappointment.
Administration coherence is the solitary advantage of an ungrounded framework. The weaknesses are: transient overvoltages are not controlled, framework voltages over the ground are not controlled. The ungrounded framework is entirely coupled to ground. Were administration progression is required an ungrounded framework is protected as I would like to think, if the appropriate strategies are utilized, for example ground locator lights, find and right ground-blames when useful, and so on
Does your client have a real requirement for an ungrounded framework? Assuming not, I would suggest a grounded framework. Corner establishing presents different issues, for example no breakers whenever grounded stage is interuppted (should open all stages). You could utilize a crisscross transformer to ground the framework however it is smarter to simply supplant the 75 kVA xformer with a 240V 3-Phase 4-Wire xformer.
Administration coherence is the solitary advantage of an ungrounded framework. The weaknesses are: transient overvoltages are not controlled, framework voltages over the ground are not controlled. The ungrounded framework is entirely coupled to ground. Were administration progression is required an ungrounded framework is protected as I would like to think, if the appropriate strategies are utilized, for example ground locator lights, find and right ground-blames when useful, and so on
Does your client have a real requirement for an ungrounded framework? Assuming not, I would suggest a grounded framework. Corner establishing presents different issues, for example no breakers whenever grounded stage is interuppted (should open all stages). You could utilize a crisscross transformer to ground the framework however it is smarter to simply supplant the 75 kVA xformer with a 240V 3-Phase 4-Wire xformer.