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Search took 0.01 seconds. Search: Posts Made By: ICanHas
Forum: Geothermal & Heat Pumps 08-31-14, 11:24 PM
Replies: 51
Views: 33,098
Posted By ICanHas
And relay requires holding current and it's an...

And relay requires holding current and it's an added cost and complexity.

Does switching to two diode from bridge at low load reduce load as measured at primary side of distribution transformer...
Forum: Geothermal & Heat Pumps 08-31-14, 10:37 PM
Replies: 51
Views: 33,098
Posted By ICanHas
Who's transformer are you talking about anyways? ...

Who's transformer are you talking about anyways?

If there's an effective load side harmonic mitigation like used in lighting ballasts, you don't have much reaching the transformer. Harmonics DO...
Forum: Geothermal & Heat Pumps 08-31-14, 08:10 PM
Replies: 51
Views: 33,098
Posted By ICanHas
What makes you think that in 2014, the cost of...

What makes you think that in 2014, the cost of providing service per revenue dollar isn't higher in rural than high density commercial? If it was privatized, the monthly charge would be...
Forum: Geothermal & Heat Pumps 08-31-14, 05:49 PM
Replies: 51
Views: 33,098
Posted By ICanHas
It would be much more cheaper and preferable for...

It would be much more cheaper and preferable for energy providers(and other rate payers) to make these changes. Rural customers are especially a HUGE burden. They'd much rather make it be like a...
Forum: Geothermal & Heat Pumps 08-31-14, 08:36 AM
Replies: 51
Views: 33,098
Posted By ICanHas
Neighborhoods frequently don't even have 3 phase...

Neighborhoods frequently don't even have 3 phase power or transformers coming to them. Many of those transformers are SINGLE PHASE 7,200 V medium voltage to 120/240 LOW voltage.

Well, you and...
Forum: Geothermal & Heat Pumps 08-30-14, 11:39 PM
Replies: 51
Views: 33,098
Posted By ICanHas
Proprietary distribution is unpractical without a...

Proprietary distribution is unpractical without a large consumer of this service.

Nuthin' innovative about private DC network. 600-750V LVDC is used all over the place for internal consumption...
Forum: Geothermal & Heat Pumps 08-30-14, 09:05 PM
Replies: 51
Views: 33,098
Posted By ICanHas
But we're not talking about it in specific...

But we're not talking about it in specific end-user industry. Data centre would be so called medium voltage customer with customer owned distribution equipment.

Purpose specific centralized DC...
Forum: Geothermal & Heat Pumps 08-30-14, 05:28 PM
Replies: 51
Views: 33,098
Posted By ICanHas
I wasn't blaming them for that. They're not...

I wasn't blaming them for that. They're not "load". I am referring to electronic loads, like variable speed motor drives which is often called "inverter drive". You're thinking of the wrong inverter,...
Forum: Geothermal & Heat Pumps 08-30-14, 12:09 AM
Replies: 51
Views: 33,098
Posted By ICanHas
You're right we don't have a choice as an...

You're right we don't have a choice as an individual in power transmission equipment.

We have the choice to use or not use polluting technology. Awareness helps you realize something you maybe...
Forum: Geothermal & Heat Pumps 08-26-14, 02:30 PM
Replies: 51
Views: 33,098
Posted By ICanHas
HVDC? You're off 3 decimal places. We do have...

HVDC? You're off 3 decimal places. We do have HVDC, the pacific intertie at 1MV (aka 1,000kV )

Only SOME ' alternative ' sources are DC.
Look at Voith WinDrive based wind generation, an...
Forum: Geothermal & Heat Pumps 08-25-14, 10:53 PM
Replies: 51
Views: 33,098
Posted By ICanHas
Oh hi, welcome to 1920s. ...

Oh hi, welcome to 1920s.
http://cityroom.blogs.nytimes.com/2007/11/14/off-goes-the-power-current-started-by-thomas-edison/
Forum: Geothermal & Heat Pumps 08-25-14, 10:11 PM
Replies: 51
Views: 33,098
Posted By ICanHas
As I said, even one unit can have adverse effect...

As I said, even one unit can have adverse effect depending on distribution transformer size.
It is about "eco friendly" so if the energy consumption that is inclusive of transformer loss and...
Forum: Geothermal & Heat Pumps 08-25-14, 09:40 PM
Replies: 51
Views: 33,098
Posted By ICanHas
But you didn't answer my question regarding THDi...

But you didn't answer my question regarding THDi values on that system. This thread is about power system pollution. You literally posted YouTube videos from those people all over the place. I'd...
Forum: Geothermal & Heat Pumps 08-25-14, 08:25 PM
Replies: 51
Views: 33,098
Posted By ICanHas
All you've got is anecdotal evidence. The...

All you've got is anecdotal evidence. The measured current could very well be incorrect if it was not measured correctly using a right instrument.

Please provide the kVA, kW, THD and 3rd, 5th,...
Forum: Geothermal & Heat Pumps 08-25-14, 04:32 AM
Replies: 51
Views: 33,098
Posted By ICanHas
There's no easy answer. It depends on the kVA...

There's no easy answer. It depends on the kVA size of transformer feeding your house, your load size relative to that rating and percentage of your load relative to total load at the time.

The...
Forum: Geothermal & Heat Pumps 08-25-14, 12:56 AM
Replies: 51
Views: 33,098
Posted By ICanHas
Not all VFDs are the same. What is true to a...

Not all VFDs are the same. What is true to a harmonic reduced VFD do not translate to the same holding true for the stripped down bare minimum VFD one buys from Alibaba.

A 500W 1kVA load from a...
Forum: Geothermal & Heat Pumps 08-25-14, 12:02 AM
Replies: 51
Views: 33,098
Posted By ICanHas
Well, not yet at least. Did you get to take a...

Well, not yet at least. Did you get to take a look at the IEEE doc?

"A typical transformer rating for residential application is 25 kVA or 50 kVA with services run to between 6 and 10 homes.
" ...
Forum: Geothermal & Heat Pumps 08-24-14, 08:34 PM
Replies: 51
Views: 33,098
Posted By ICanHas
You misunderstood the type of inverter. Of course...

You misunderstood the type of inverter. Of course you can make run whatever at whatever waveform in an isolated circuit that isn't interconnected. Aircraft equipment operates at 400 Hz for example....
Forum: Geothermal & Heat Pumps 08-24-14, 08:19 PM
Replies: 51
Views: 33,098
Posted By ICanHas
I disagree. There are YouTube videos about using...

I disagree. There are YouTube videos about using surplus industrial VFD at home and discussions advocating it. I think the creator of video has good intentions, yet unaware of harmful effects when...
Forum: Geothermal & Heat Pumps 08-23-14, 03:51 PM
Replies: 51
Views: 33,098
Posted By ICanHas
No, you're looking into the near past. As dirty...

No, you're looking into the near past. As dirty load concerns grow, regulations will tighten and I expect the expansion of something similar to IEC directives in Europe regulating harmonic producing...
Forum: Geothermal & Heat Pumps 08-21-14, 08:28 PM
Replies: 51
Views: 33,098
Posted By ICanHas
That's exactly how devices cause problems on the...

That's exactly how devices cause problems on the grid.

If you were going to apply brakes on your bicycle you can:

apply smooth and steady braking throughout the rotation.... "clean load" ...
Forum: Geothermal & Heat Pumps 08-21-14, 07:51 PM
Replies: 51
Views: 33,098
Posted By ICanHas
OEMs recognize the power quality issues in these...

OEMs recognize the power quality issues in these large harmonic producing loads and consumer oriented products like production spec mini-splits do have harmonic mitigations.
Forum: Geothermal & Heat Pumps 08-21-14, 03:22 AM
Replies: 51
Views: 33,098
Posted By ICanHas
Harmful effect on power systems from using big VFDs or tons of computers at home

An old small industrial VFD or new bare-minimum built CHINA MADE VFD eBay devoid of all but the essential parts can have a power factor of 0.5 to 0.6 with a total harmonic distortion of 100-150%.
...
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