Andrew: The motor with its frequency, voltage and idle current are needed to determine ( calculate ) the capacitance values. Which You have not supplied at...
Nando
nando37@...
Sep 1, 2006 4:13 pm
7434
please do it. it will be a great help to all of us who don't understand German. With best regards Vibhash ... -- Regards Yours truly Vibhash Garg Chief...
Vibhash
vibhashgarg@...
Sep 1, 2006 4:17 pm
7435
Thanks Nando and George. Yes, George, I have 70 meters of head and an average 110 liters of flow. My site is a creek that flows over a ridge, dammed at the...
hello all, tomorrow you may expect a summary of the article in english. it may not be linguistically perfect as english is not my native language, but it will...
Hi gang. I thought the Google translation did a great job, with most untranslatable stuff being unimportant (at least to me). The only thing that was missing...
Dear Group I have posted an intro to the basic principles of nmicro-hydro on the web site www.off-grid.net - I'd really apreciate your comments as to whether...
michael, translating technical stuff and exactidude is quite a chore indeed if you say the google-translation is ok, most of us should be happy with that. ...
Hello, Can anyone pls tell me how to select a HDPE penstoke, for example If I know that I need a flow of 25 l/s and there is a head of 40meters and the...
hi this is kishan from Nepal. i m new member in this group. i m an electrical engineering student. well, the question i have is that. i m trying to make a...
I have a grid connected 3 phase induction motor driven by Francis turbine. It is run up to synchronous speed by water before engaging the main breaker. I can...
I suspect that you only have two phase available at your site and you are connected to the grid by delta connection giving you a pseudo three phase connection....
Martin: You are not giving enough information to really determine what you have, BUT the 427 volts with 58 Amps and PF=0.9 seems to be the optimum operating ...
Nando
nando37@...
Sep 4, 2006 6:57 pm
7447
Full 3 phase connection. If one phase was lost I would not get 400 + V at each one. Power factor measured by GE F650 bay controller (similar to new W650 for...
Thanks Nando I always appreciate your comments. Gilkes 450 mm Francis turbine series 'C' Head 8 m Flow 1.3 m3/s Gilkes manual says 380 RPM Pulley 4 to 1 Can...
The site gives 8 * 1.3 * 9.81 = 102 Gross KW 427 V* 58 A = 24.77 Kw * 3 = 74.2 KW withan efficiency of about 72.7 % which is good indeed. I presume that You...
Nando
nando37@...
Sep 4, 2006 9:51 pm
7450
Nando Direct 3 phase WYE connection no capacitors Off the shelf 3 phase induction motor no modifications. I. bring it up to synchronous speed with water by...
Martin: Now that you say that you have 3 phase connection, You may have given the voltage and current information for the 3 phase single event and not 3 ...
Nando
nando37@...
Sep 5, 2006 7:42 pm
7452
Martin I have seen a similar problem performance caused by a faulty transformer tap changer - where one phase was not changing with the others. So - does the...
Hello All, I received this message below from Joe Hartvigsen a few weeks ago and he has not responded since to my request for details about his royalty rights....
I am assuming you are serious. The short answer is no. The only possible ways you could make a 12V alternator work in this application would be to over-speed...
... You will normally need an alternator of the same voltage as the rest of the system. The battery and inverter and charge controller all need to be 48 volt...
3 of my 4 turbines are ford alts running a 48 v system, they were rewound for 48vdc (the orig style of Harris Hydro turbines) ... From: "Randy Bonner"...
I may be a bit off, But if you have a set of 4 12 volt batteries, you could charge them with a twelve volt alternator, and then wire the output to get 48 volt...
We are a small investment group interested in natural energy. Although our experience is limited in this particular field, we feel that the current high price...
Hello Omar: If you refer to sites that are connected to the grid, then selection of type, size and number of turbine depends on each individual site...
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