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Thread: LED globe lifespan
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6th June 2023, 09:15 PM #16
Perhaps in the not-too-distant future, the power distribution system will include inverters being installed as part of every new built house. Or maybe large capacity inverters at the end of every street. And their purpose: to convert the varying voltage of the power supply to DC and then transform that into reliable 240V AC. Then watch your power bills soar.
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7th June 2023, 09:14 AM #17
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A WA power engineer told me that one reason they did this the lower V loss towards the end of long 240V lines and couldn't justify the cost if stepping up the V - transmitting that - and then stepping down again. Some of these small distant towns are being disconnected from the grin and getting their own renewable Power including community batteries.
15 years ago we had a 10 year old dishwasher (DW) that would not function at our place, but worked fine at the manufacturers service centre about 5 suburbs away. This had the service people stumped but eventually they put me into retired engineer who had experience with this sort of thing, and the first question he asked me is where do you live. Reason was they had problems with that model of DW when used in the country on the end of long low V transmission lines. Then we checked the V at our place (230-ish V) and at the service centre (240-ish V). When I interposed a Variac (adjustable Transformer) between the house supply and the DW and ran the Variac at 245V and it worked fine. The problem turned out to be in the epoxy embedded controller board that was no longer available so I ran the DW on the Variac but over time it needed a higher and high V to operate. When the DW needed ~260V I deemed it too dangerous to continue I decided to chuck the DW out.
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8th June 2023, 12:13 PM #18
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We had ongoing issues with our inverter shutting down due to high voltage. Our problem was solved by installing a thicker cable between the house and the grid. The thicker cable has lower resistance, so the inverter doesn't have to increase the voltage as much to push it back onto the grid. We had 247V on the grid, but 255V at the inverter.
We haven't had a problem since.
I guess this won't help in areas where the grid is very near the maximum already, but just thought I'd mention it.
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6th July 2023, 03:47 PM #19
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The nominal voltage in most areas of Australia had been set at 240 V in 1926. In 2000,
Standards Australia issued a system Standard AS60038, with 230 V as the nominal voltage with a +10% to –6% variation at the point of supply, i.e., 253 V to 216.2 V.
A new power quality standard, AS61000.3.100, was released in 2011 that details additional requirements.
The new standard stipulates a nominal 230 V, and the allowable voltage to the customer's point of supply is, as mentioned, +10% to –6%.
However, the preferred operating range is +6% to –2%. (244 V to 225 V).
(AS/NZS 3112 - Wikipedia )
ALL of these "specifications" include 240 V AC
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22nd July 2023, 10:27 AM #20
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3rd August 2023, 05:55 PM #21
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As "Fluorescent" lamps have been discussed on this "thread", this may be of interest
Switching off fluorescent lighting for good - Electrical connection
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6th August 2023, 07:00 PM #22
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11th August 2023, 06:00 PM #23
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Getting back to Cecile's original question : -
I will refer to that which I posted on another site: -
LED bulbs dying prematurely in one light fixture | DIY Home Improvement Forum
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HEAT is usually the main problem with LED failure.
Originally Posted by FrodoOne, post: 6975216, member: 372721
Again, I contend that the construction of "Filament" type LED lamps is such that
most of the waste heat is produced in the "Filament LEDs" and
what little waste heat that is produced by the Driver components in the Base
is largely conducted away by the metal Base and the metal Socket within which it sits - thus reducing the "overheating" damage to the few "electronic components" involved.
The fitting concerned (in Post #1) appears to be of metal construction and this is likely to provide more "heat sinking" for the "Driver" components within the Bases.
The OP (Otis R) should, at least, try the use of appropriate "Filament Leds" !
Also, I suggest the viewing of
[MEDIA=youtube]Y1UOjhy5zmQ[/MEDIA]
to see an exposition of some of the "points" to which I have referred.
The viewing of this rather esoteric video, which relates to "Filament LEDs", may also be of interest.
[MEDIA=youtube]tbvVnOxb1AI[/MEDIA]
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12th August 2023, 08:18 PM #24
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I reckon I've had ALDI LEDs since they started selling them, cheaply on Special Buy, $3?. Thinking about them, I don't recall ever having to replace one! I now have heaps of spares, BC and ES, warm and cool, and the way they're going it could be a lifetime supply!
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