Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > sci.electronics.design > #450992
| From | David Lesher <wb8foz@panix.com> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: Trust your what-hour err watt hour meter |
| Date | 2017-03-09 16:30 +0000 |
| Organization | NRK Clinic for habitual NetNews Abusers - Beltway Annex |
| Message-ID | <o9rvuh$b9j$1@reader1.panix.com> (permalink) |
| References | <o9k61h$q0a$3@reader1.panix.com> <o9kla0$unq$1@dont-email.me> <3aorbcp5gf23lcg1oi6jn46jt3vtu9hm06@4ax.com> |
John Larkin <jjlarkinxyxy@highlandtechnology.com> writes: >The old disk meters were very accurate for sinewave loads, at any >power factor. In fact, it's hard to design an electronic meter as good >as the old disks, one that will pass ANSI C12. About the only spec >that's easier for an electronic meter to pass is tilt sensitivity. >I'm sure any smart meter has to be lab tested to C12 levels. Mine >were. >The mechanical meters were better for stuff like lightning strikes, >too. >Mathematically, as long as the voltage waveform remains sinusoidal, >there is no energy in the current harmonics. But the issue at hand is all about non-sinusoidal waveforms, is it not? Does C12 even cover such? It's only recently that such have predominated in resi loads. [A friend got dragged into mess at a cement plant. His gadget depended on zero crossing detection. There was a mixer with a VFD; said mixer was a several thousand horsepower motor. At some speeds, it took such big chunks out of the plant feed that "zero" was not where it should be....] -- A host is a host from coast to coast.................wb8foz@nrk.com & no one will talk to a host that's close.......................... Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433
Back to sci.electronics.design | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Trust your what-hour err watt hour meter David Lesher <wb8foz@panix.com> - 2017-03-06 17:25 +0000
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 10:29 -0800
Re: Trust your what-hour err watt hour meter bitrex <bitrex@de.lete.earthlink.net> - 2017-03-06 14:10 -0500
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 14:21 -0800
Re: Trust your what-hour err watt hour meter bitrex <bitrex@de.lete.earthlink.net> - 2017-03-06 18:20 -0500
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 16:35 -0800
Re: Trust your what-hour err watt hour meter bitrex <bitrex@de.lete.earthlink.net> - 2017-03-06 19:53 -0500
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 17:08 -0800
Re: Trust your what-hour err watt hour meter bitrex <bitrex@de.lete.earthlink.net> - 2017-03-07 13:05 -0500
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-07 10:43 -0800
Re: Trust your what-hour err watt hour meter Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-07 14:21 -0500
Re: Trust your what-hour err watt hour meter whit3rd <whit3rd@gmail.com> - 2017-03-06 18:36 -0800
Re: Trust your what-hour err watt hour meter rickman <gnuarm@gmail.com> - 2017-03-06 14:52 -0500
Re: Trust your what-hour err watt hour meter George Herold <gherold@teachspin.com> - 2017-03-06 12:04 -0800
Re: Trust your what-hour err watt hour meter rickman <gnuarm@gmail.com> - 2017-03-06 15:15 -0500
Re: Trust your what-hour err watt hour meter Jon Elson <jmelson@wustl.edu> - 2017-03-06 14:28 -0600
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 16:41 -0800
Re: Trust your what-hour err watt hour meter Jon Elson <jmelson@wustl.edu> - 2017-03-06 14:26 -0600
Re: Trust your what-hour err watt hour meter bitrex <bitrex@de.lete.earthlink.net> - 2017-03-06 15:30 -0500
Re: Trust your what-hour err watt hour meter bitrex <bitrex@de.lete.earthlink.net> - 2017-03-06 15:28 -0500
Re: Trust your what-hour err watt hour meter rickman <gnuarm@gmail.com> - 2017-03-06 16:04 -0500
Re: Trust your what-hour err watt hour meter Jeff Liebermann <jeffl@cruzio.com> - 2017-03-06 16:22 -0800
Re: Trust your what-hour err watt hour meter David Lesher <wb8foz@panix.com> - 2017-03-09 16:03 +0000
Re: Trust your what-hour err watt hour meter Wim Ton <wim.ton@gmail.com> - 2017-03-09 12:39 -0800
Re: Trust your what-hour err watt hour meter Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-03-09 15:46 -0800
Re: Trust your what-hour err watt hour meter TTman <pcw1.cad@ntlworld.com> - 2017-03-06 21:48 +0000
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-06 14:32 -0800
Re: Trust your what-hour err watt hour meter David Lesher <wb8foz@panix.com> - 2017-03-09 16:30 +0000
Re: Trust your what-hour err watt hour meter makolber@yahoo.com - 2017-03-09 12:27 -0800
Re: Trust your what-hour err watt hour meter Neon John <no@never.com> - 2017-03-09 15:43 -0500
Re: Trust your what-hour err watt hour meter Wim Ton <wim.ton@gmail.com> - 2017-03-09 12:49 -0800
Re: Trust your what-hour err watt hour meter Neon John <no@never.com> - 2017-03-11 11:11 -0500
Re: Trust your what-hour err watt hour meter Wim Ton <wim.ton@gmail.com> - 2017-03-11 12:28 -0800
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-09 12:59 -0800
Re: Trust your what-hour err watt hour meter Neon John <no@never.com> - 2017-03-11 17:38 -0500
Re: Trust your what-hour err watt hour meter John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-11 15:04 -0800
Re: Trust your what-hour err watt hour meter Wim Ton <wim.ton@gmail.com> - 2017-03-09 12:47 -0800
Re: Trust your what-hour err watt hour meter Neon John <no@never.com> - 2017-03-08 20:05 -0500
Re: Trust your what-hour err watt hour meter Phil Allison <pallison49@gmail.com> - 2017-03-11 17:42 -0800
Re: Trust your what-hour err watt hour meter Phil Allison <pallison49@gmail.com> - 2017-03-06 17:53 -0800
Re: Trust your what-hour err watt hour meter Cursitor Doom <curd@notformail.com> - 2017-03-07 17:58 +0000
Re: Trust your what-hour err watt hour meter Anthony Stewart <tony.sunnysky@gmail.com> - 2017-03-09 15:31 -0800
csiph-web