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Fruit Trader
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Posts posted by Fruit Trader
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32 minutes ago, Muhendis said:
It is double insulated according to the triangle with the circle and tick mark inside.
https://www.eess.gov.au/rcm/regulatory-compliance-mark-rcm-general
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5 hours ago, OneMoreFarang said:
The Shelly devices will be connected to an electrical switch. But there is no load (in my case). The Shelly devices have a WLAN receiver and that's what I use.
Shelly device with powered electronics only, no relay load.
All brand name devices like Shelly and Sonoff have some kind of internal protection at the electronics supply circuit. Inline fuse, fuseable resistor or similar.
As already mentioned, very short lengths of 1mm cable will easily carry your breaker trip current although an electrician following his code would likely shout foul.
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22 hours ago, jij said:
i've gone thru two sets of seven pool lights. The last batch only lasted two years. They were Emaux low voltage sealed in resin. i feel silly buying the same brand again, but was told by a pool supply owner that they were the best and that they must be sealed in reason.
Thoughts?Suggestions?
Wise crack comments?
One possible cause of premature failure in LED pool lights.
A while back my brother-in-law returned home with some failed LED pool lights from a local pool. Thinking about making repairs we dismantled the lights to find that the electronics sealed inside a clear compound has suffered corrosion and burning. Further investigation revealed water had found its way inside of the sealed area down the supply cable.
We later made a visit to the installation and found all poolside connections to the lights submersed in water because of pools flood over design.This service bulletin from Hayward Pool Products points out this problem and the need to seal cable ends at the supply junction.
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5 hours ago, bluejets said:
Digital or not, it is well known the ability to get an accurate reading with a vernier is well nigh impossible, that is why for accuracy a micrometer is used.
Your statement is pointless without defining accuracy required.
I have just repeated the area measurement method made by @Muhendis (the method you previously questioned) on a 10mm2 copper cable using digital vernier caliper which repeated within .03mm. I repeated the test using a 0-25mm micrometer and obtained the same result but the wider contact area of the micrometer slightly improved repeatability.
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6 hours ago, grubman said:
To be honest it doesn't look to be a brand new pickup, the wheels don't look like standard wheels which are on a new Mitsubishi Triton, and the white pickup with black roof is not standard so either its a second hand pick up and new owner, however good to see that no one was injured in the accident, car can be replaced but people can not
You can buy new fully dream pimped and street cred ready.
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2 hours ago, bluejets said:
Just to be difficult, verniers are not all that accurate (micrometer yes, vernier no) and could be enough to throw off your final calculations.
That plus it could be you measured what is known as "compressed " cable or " XLPE" where the conductors are not actually round.
XLPE is an insulation type.
The average accuracy of digital vernier calipers is around .02mm
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20 minutes ago, VocalNeal said:
Why is the EV on the "tow truck"???? Supposed to be the pick up that is undrivable.
Would you get back inside and drive an EV that has just been heavily rear ended.
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1 hour ago, 007 RED said:
You've 'hit the nail on the head'. My small scale GTI system is normally allowed to export any surplus electricity to the grid. The exception being the day when the meter reader comes, then it's definitely switched into NO EXPORT mode to stop the disc spinning backwards.
I have not done much reading in these threads but interesting to discover a Sofar KTL-G3 series user.
I have some history with this series of Sofar inverters which use passive cooling only. I would be interested to know if your inverter logs 'Temperature De-rating' errors on very hot days. If your inverter is located outside in the shade you probably never see this error.
Along with a few guys in a small group, we also use Sofar KTL-G3 inverters (3.3kW version) one for each phase feeding our work sheds. They are de-rated for no export but rarely does the situation arise where we don't use all solar production.Only problems we have had with these inverters are over temperature de-rating solved with extra cooling, over grid voltage solved by changing country code and extracting Modbus information from Sofar technical.
Below I show a mod done to all inverters. Electronic controlled cooling fans below the heat sink which includes modified mounting bracket to increase spacing.
Back to the subject of this thread, how to see the maximum panel output that is possible under the current conditions.
To find potential power output above actual consumption would require a known reference. This might be a small loaded collector mounted next to the main string.
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4 hours ago, bluejets said:What your graph shows is not only what the panels are producing per se but, the load connected ( current) which is varying anywhere between 2 and 10 amps over a 4 hour ( approx) period.
Voltage is fairly constant over the sample period @ around the 120v dc input level.
Your assumption about clouds being the source of the current fluctuations is incorrect.
When panels are initially installed it is a common practice/requirement to measure and record the panels "short circuit " current which is an indicator of their capacity.
It's very likely this inverter is exporting which means all energy being produced will be consumed. If this is the case, current variations will be from cloud movements and the constant voltage from the inverters control of power point.
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1 hour ago, Bandersnatch said:
Not going to make that mistake again.
Yes you will, every time without fail.
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1 minute ago, Bandersnatch said:
Just another China hating channel, all their videos are anti China.
You said it was more information- where did it discuss different battery chemistry in EVs and the difference between PHEVs and BEVs. You know NEVs and BEVs are not the same right?
Pleased you enjoyed the video.
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8 hours ago, webfact said:
Firefighters managed to control the fire within 15 minutes.
Most ICE vehicle fires can be extinguished quickly often with less than 2000 litres carried on a fire truck.
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On 8/10/2023 at 6:45 AM, Bandersnatch said:
Before anybody bothers to post it - there is a video doing the rounds posted by a China hating channel claiming that BYD EVs in China are catching fire all the time. He fails to identify the cars as PHEV (they have a gasoline engine) or full EV.
Watch this linked video first.
The video below is a lot more informative and goes beyond the subject of EV fires. The exploding vehicle on charge early on in the video is quite spectacular.
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20 minutes ago, p414 said:
thanks F.T. does that mean I drive up Vipowadi Rangsit and after a little way I can turn ight to enter the expressway heading towards the airport ?
On the monument circle road head out and pass under the expressway then make a U turn. On the left side just before the expressway you passed under; there is a turn onto the toll gate ramp, you really can't miss it.
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1 hour ago, Confuscious said:
The Dutch coast guard said Thursday the cause of the blaze was unknown, while Dutch media reported that the battery of an electric care started the fire.
Does not matter where the fire started as once EV's containing 500 slabs of self oxidizing fuel joined the party it was game over.
I hear the ship will enter salvage with a new name Dutch Oven.
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3 hours ago, gamb00ler said:
It seems like you are telling me that I cannot rely upon the relay I showed in an earlier post to complete the circuit from PEA power to the pump. The pump I'm using draws 8 Amps and they rate that relay at 10 Amps.
It seems that the price of 142฿ is rather low.
The 8 pin 24V ac relay shown earlier will do the job if only operated one time each day.
As for the cheap solid state relays, they do not employ the ideal electronic switching method for inductive loads. Very likely it would fail in the on state which is probably not ideal or even introduce a high resistance path and cook itself to death.
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Solid state relays for reactive loads like a 1.5HP motor should be chosen carefully. Not all switching methods are suitable.
Low price fake Chinese Fotek brand (zero cross point) solid state relays are famous for containing underated low quality componemts unable to handle specified currents. A search for cheap Chinese solid state relays will soon reveal why they are so cheap.
A reliable and common solution for Sprinkler controllers like Rainbird and Hunter is to interface with a pump contactor using a small 24V ac relay.
Below shows irrigation control we built for a local well installation. The sprinkler controller calls a 24V AC relay which in turn energises the 220V AC pump contactor to supply a feed pump.
Example of a off the shelf sprinkler to pump interface.
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1 hour ago, KhunLA said:Repeating yourself in red doesn't make it true.
Apparently you have some reading comprehensions issues.
Have a nice day, BYE BYE
No matter how much of your personal story you throw at it, my claim remains true.
I must say though, your EV obsession and ramblings are somewhat entertaining.
PS
English is my second language, so I guess comprehension issues are possible. Having said that, people who live in glass houses shouldn't throw stones.-
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34 minutes ago, motdaeng said:
most solar systems
generate surplus energy, which can be harnessed to charge an electric car. this surplus energy can
essentially be considered as free electricity
Yes when the solar investment has paid back. Until that point arrives, surplus yes, free at no cost, no.
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After being ripped off and given the run around by several Chon Buri vets our family uses the Kasetsart University Animal Hospital in Bangkok for anything complicated.
Get there at 7:00 am to avoid heavy traffic and pick up queue ticket. Take with you all info from local vet visits.
From Si Racha to this area I used H7 - H9 - 350 - 351 or use Google for other route.
https://vet.ku.ac.th/veten/index.php/hospital-kamphaengsaen2
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On 7/28/2023 at 8:51 AM, KhunLA said:
It is in my case, as an EV was not in the game plan, as we bought a new ICEV at the same time the house & solar were being built/installed.
We charge with 'excess' solar. Without the ฿240k govt incentive, a good chance we would not have bought an EV, as very happy with our ICEV.
What thrifty shopper buys a new car, then sells it 2 yrs later ? We kept all prior ICEV for 5-7 yrs, selling at the 125k-150k kms mark, not 40k kms.
The EV we'll keep till it dies, though we may die first.
No extra outlay of ฿ to accommodate charging the EV. Without the EV, we still need the same size solar system to stay off the grid at night. That there is so much extra during the day, is just a plus.
Sounds like 'free' to me.
Solar power is a great way to charge EV's but one cannot claim the power is free (no cost) until the value of electricity produced exceeds the cost of solar equipment.
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4 minutes ago, transam said:
And maintenance, do solar panels have a life span, I don't know.....????
Yes they do and in many cases it will far exceed the return on investment period.
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Solar power is a great way to charge EV's but one cannot claim the power is free (no cost) until the value of electricity produced exceeds the cost of solar equipment.
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Short small diameter wires with 16A fuse?
in The Electrical Forum
Posted
Mains supply isolation requirement for home automation switching devices is mostly decided by the the relay contacts state. If the contacts are dry (volt free) then good mains isolation at the PCB is desirable.
Example below Shelly with dry contact isolation. The OP has model without dry contacts.