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Everything posted by Muhendis
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ATS working in manual only ( No auto)
Muhendis replied to Pink7's topic in Alternative/Renewable Energy Forum
They are nothing to do with the basic function but are volt free and can be used for gen set starting. -
ATS working in manual only ( No auto)
Muhendis replied to Pink7's topic in Alternative/Renewable Energy Forum
Inside the ATS there is a relay, a motor and two main MCBs. The relay is powered by the "N" circuit I think and will remain energised until power is lost at that input. When the relay is de-energised the motor is powered to cause the MCBs to switch over to the "R" circuit. The opposite happens when power is restored to "N" input. Make sure the supply to the "N" side and the "R" side is good. -
Solar Pump. What will happen in this case?
Muhendis replied to MJCM's topic in Alternative/Renewable Energy Forum
That's a good idea in conjunction with a ballcock. The riser would need a spring loaded relief valve to ensure that the pump can't misdirect water out through it under normal tank filling conditions. The scenario would be that the tank fills. The ballcock closes. Pumped water pressure overcomes relief valve and pump merrily carries on working without undue stress. The relief valve could be at the pump end of the pipe so that pumped but unwanted water can return to the lake. Oh. Wait a minute. I think I already said that..................???? -
Solar Pump. What will happen in this case?
Muhendis replied to MJCM's topic in Alternative/Renewable Energy Forum
Have you considered the Automatic (sorry) Syphon approach. When the water in the tank gets too high, the syphon will start draining water out 'til the water level gets to the bottom of the syphon inlet. No power needed but I have no idea where to get or how to make one. They can be found as science projects on google. -
Solar Pump. What will happen in this case?
Muhendis replied to MJCM's topic in Alternative/Renewable Energy Forum
Could be done but I thought this forum was for the frugal approach. -
Solar Pump. What will happen in this case?
Muhendis replied to MJCM's topic in Alternative/Renewable Energy Forum
Mount a mobile phone on a three port solenoid valve so that when the mobile phone rings the valve will open allowing the pumped water to return to the point of origin thus no longer filling the tank. Said solenoid valve is powered from the pump solar panel and reverts to tank filling state when night falls. Ok back to serious solutions. -
Solar Pump. What will happen in this case?
Muhendis replied to MJCM's topic in Alternative/Renewable Energy Forum
In central heating systems which I once did for a short time, The centrifugal pump would have a small'ish pipe connected from it's input to its output. so that if the system pressure increased due to all the radiator valves being closed, the water would then choose the bypass pipe. Water likes to take the route of least resistance so under normal conditions the water would go down the larger bore pipe and fill the tank. Very little would take the bypass route. When the tank is full the ballcock or ball valve, yet to be fitted, will close and the water then takes the easier route from the pump output back to the input or source. -
Car falls from parking building in Bangkok Rama 4, injures one man
Muhendis replied to webfact's topic in Bangkok News
That sounds about right. If he had been going really slow the back wheels would have dropped and the car would have stopped with the wheels hanging over the edge. -
Solar power, can it be done DIY?
Muhendis replied to Sophon's topic in Alternative/Renewable Energy Forum
Yeah. That's why we like to create as much enclosure space as possible. Getting wires and fingers into a tight space is really quite a needless struggle but what you have achieved looks good and professional. -
the ideal dual 3-prong socket for a kitchen
Muhendis replied to mahjongguy's topic in The Electrical Forum
Very expensive box full https://shopee.co.th/Schneider-Electric-เต้ารับคู่-3ขา-มีกราวด์-พร้อมม่านนิรภัย-พร้อมสวิตซ์-ยกลัง-สีขาว-สีเทา-สีดำ-Duplex-Sockets-AvatarOn-A-i.231819254.23324111160?sp_atk=b2d1d7ff-dfc5-4289-9f29-dd8396ae5cc8&xptdk=b2d1d7ff-dfc5-4289-9f29-dd8396ae5cc8 More normal price individual https://www.lazada.co.th/products/nano-i1765130076-s5122324151.html? -
Help understanding power generation and usage
Muhendis replied to statman78's topic in Alternative/Renewable Energy Forum
That is so true. It took seven years to finally get my normal rate meter fitted but would you believe it took 'em just ten minutes to remove it the other day. My dearly beloved forgot to pay the January bill of 82Bht. When you want something forever is the shortest time. On the other end of the scale, greased lightning looks so slow. -
Political parties face tough balancing act in labour market
Muhendis replied to webfact's topic in Thailand News
Oh dear. I think I misread the headline. The word is "tough" not "trough". -
88% of Thailand bank accounts have less than 50,000 THB
Muhendis replied to webfact's topic in Thailand News
"88% of Thai bank accounts have less than 50,000 THB" The other 12% are Thai government workers and police I expect. -
Wow. Such an amount of connectivity is awesome. How do you find the time to be unconnected?
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PEA found out meter is spinning backward
Muhendis replied to eddysacc's topic in Alternative/Renewable Energy Forum
I don't blame them either. With the control steps in 25% increments I would wonder if my home domestic use would also be impacted. -
PEA found out meter is spinning backward
Muhendis replied to eddysacc's topic in Alternative/Renewable Energy Forum
Yeah they use wireless controlled relays to control household power export. I think you probably are aware of this in your Sofar inverter. -
PEA found out meter is spinning backward
Muhendis replied to eddysacc's topic in Alternative/Renewable Energy Forum
I like your pun. -
PEA found out meter is spinning backward
Muhendis replied to eddysacc's topic in Alternative/Renewable Energy Forum
Note in another thread that many commercial users are installing solar to reduce energy bills from PEA. Can you imagine what will happen when all electricity is from individual solar installations? PEA will be trying to supply electricity to ........ well......... nobody. Another scenario is that if every solar home were to export their excess power then what would happen to the grid voltage? -
Well no I think it's about the same. I am from the UK where the standard riser height is 8" and the tread 10". So the half height would be the same as your 100mm. It took a bit of getting used to but the amount of knee joint movement to get up and down was very small.
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I would be interested to know more. Which is cheaper my ToT fibre connection @ 300 Bht/month or a mobile phone hotspot.
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Yeah I first came across this in my local village. The risers were half height and the treads more than double width. Brilliant idea.