Dear Manoj Pokhrel, This problem of controlling consumer loads has come up many times over the years since we supplied the first ELC to Nepal in 1982. Various systems have been used including semi-conductor devices but most are too expensive. A fuse probably won't work, because from my experience the consumer sill simply wire it out if it's in the house. Placing the control devices in a cluster at the top of a distribution pole makes it more difficult to tamper with. By using a simple current rated bi-metallic trip switch (that resets about five minutes after the load switches off) is cheap at say R200 and encourages the customer to reduce his load rather than 'punishing him' (less likely to result in conflict because his lights have gone off). If you like the system I could make some up for you to try. Regards Rupert Evans Engineering UK www.microhydro.com
-----Original Message----- From: Nando [mailto:[EMAIL PROTECTED] Sent: 07 August 2004 14:16 To: [EMAIL PROTECTED] Subject: Re: [microhydro] suggestions required Manoj: Power control with such precision may require a small circuit to measure the voltage and the current to trip a TRIAC or a Relay to open for a few moments. One problem would be the PFC of the load and by what you imply, it seems that the load is going to be lighting and probably fluorescent lamps that should not have magnetics but electronic ballasts, also, they may not have a good PFC, just crest PFC -- please enlighten us about the lighting you may plan to implement there. Also what other loads are going to be added ( like a battery charge controller to have additional available power during the dark times ). Why don't you contact me directly -- to discuss your needs and the possible solutions Regards Nando ----- Original Message ----- From: "MANOJ" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, August 04, 2004 11:14 PM Subject: [microhydro] suggestions required > Dear all, > I'd like to know about the cheap method to trip the > current at required value...elaborating little bit > detail,a community based micro hydro power plant of > capacity 18 kW is going to be installed in the > far-flung sector of Nepal....there are 180 > beneficiaries' households....each household can not > consume more than 100 watt.. i'd like to know about > the provisions and instruments to control the current > at exact value so that a household can not consume > more than 100 watts. Effective suggestions for the > same would be appreciated...... > > Regards, > Manoj Pokhrel > Nepal > > > > ===== > Manoj Pokhrel > Biratnagar, Kathmandu > phone: 977-21-527467 > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail is new and improved - Check it out! > http://promotions.yahoo.com/new_mail > > > > > Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! > > NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. > > More information on micro hydropower at http://microhydropower.net > > To unsubscribe: send empty message to [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links ------------------------ Yahoo! Groups Sponsor --------------------~--> Yahoo! Domains - Claim yours for only $14.70 http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
