Does anyone have a figure for the switch-on inrush current of a typical
9W LED bulb? Preferably for 230/240V.
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened Pimpom <Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>:
Does anyone have a figure for the switch-on inrush current of a typical
9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my LED bulbs from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened PimpomAh, I should have formed my question more carefully. I know about those
<Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>:
Does anyone have a figure for the switch-on inrush current of a typical
9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my LED bulbs from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
early bulbs. They were the precursors to modern ones that use switching >supplies. These later models are the ones I mean.
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened PimpomAh, I should have formed my question more carefully. I know about those
<Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>:
Does anyone have a figure for the switch-on inrush current of a typical
9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my LED
bulbs from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
early bulbs. They were the precursors to modern ones that use switching supplies. These later models are the ones I mean.
On 02/10/2024 13:03, Pimpom wrote:
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened PimpomAh, I should have formed my question more carefully. I know about
<Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>:
Does anyone have a figure for the switch-on inrush current of a typical >>>> 9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my LED
bulbs from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
those early bulbs. They were the precursors to modern ones that use
switching supplies. These later models are the ones I mean.
It is still likely to be fairly small since the cheap parts they use are
not capable of more. Only way to be sure for a specific brand is to
measure it. I'd expect no more than 2-3x its nominal operating current.
The reservoir capacitor is seldom bigger than needed to avoid visible
flicker and sometimes not even that on the cheap and nasties.
Why do you need to know?
On 02/10/2024 13:03, Pimpom wrote:
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened PimpomAh, I should have formed my question more carefully. I know about those early
<Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>:
Does anyone have a figure for the switch-on inrush current of a typical >>>> 9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my LED bulbs >>> from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
bulbs. They were the precursors to modern ones that use switching supplies. >> These later models are the ones I mean.
It is still likely to be fairly small since the cheap parts they use are not capable of more. Only way to be sure for a specific brand is to measure it. I'd
expect no more than 2-3x its nominal operating current. The reservoir capacitor
is seldom bigger than needed to avoid visible flicker and sometimes not even that on the cheap and nasties.
Why do you need to know?
On 10/2/2024 12:13 PM, Martin Brown wrote:
On 02/10/2024 13:03, Pimpom wrote:
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened PimpomAh, I should have formed my question more carefully. I know about those
<Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>: >>>>
Does anyone have a figure for the switch-on inrush current of a typical >>>>> 9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my LED bulbs
from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
early bulbs. They were the precursors to modern ones that use switching
supplies. These later models are the ones I mean.
It is still likely to be fairly small since the cheap parts they use are not >> capable of more. Only way to be sure for a specific brand is to measure it. >> I'd expect no more than 2-3x its nominal operating current. The reservoir
capacitor is seldom bigger than needed to avoid visible flicker and sometimes
not even that on the cheap and nasties.
For lighting *installations* (i.e., not individual lamps), I think they
use 100x the steady state current as an upper figure. This is intended
to cover model and manufacturer variations.
With multiple lamps on a branch circuit (or whatever is driving them),
this can add up pretty quickly.
Why do you need to know?
On 10/2/2024 1:32 PM, Don Y wrote:
On 10/2/2024 12:13 PM, Martin Brown wrote:
On 02/10/2024 13:03, Pimpom wrote:
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened PimpomAh, I should have formed my question more carefully. I know about
<Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>: >>>>>
Does anyone have a figure for the switch-on inrush current of a
typical
9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my
LED bulbs from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
those early bulbs. They were the precursors to modern ones that use
switching supplies. These later models are the ones I mean.
It is still likely to be fairly small since the cheap parts they use
are not capable of more. Only way to be sure for a specific brand is
to measure it. I'd expect no more than 2-3x its nominal operating
current. The reservoir capacitor is seldom bigger than needed to
avoid visible flicker and sometimes not even that on the cheap and
nasties.
For lighting *installations* (i.e., not individual lamps), I think they
use 100x the steady state current as an upper figure. This is intended
to cover model and manufacturer variations.
With multiple lamps on a branch circuit (or whatever is driving them),
this can add up pretty quickly.
Why do you need to know?
<https://adlt.com.au/resources/led-inrush-currents/>
On 10/2/2024 1:32 PM, Don Y wrote:
On 10/2/2024 12:13 PM, Martin Brown wrote:
On 02/10/2024 13:03, Pimpom wrote:
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened PimpomAh, I should have formed my question more carefully. I know about
<Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>: >>>>>
Does anyone have a figure for the switch-on inrush current of a
typical
9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my
LED bulbs from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
those early bulbs. They were the precursors to modern ones that use
switching supplies. These later models are the ones I mean.
It is still likely to be fairly small since the cheap parts they use
are not capable of more. Only way to be sure for a specific brand is
to measure it. I'd expect no more than 2-3x its nominal operating
current. The reservoir capacitor is seldom bigger than needed to
avoid visible flicker and sometimes not even that on the cheap and
nasties.
For lighting *installations* (i.e., not individual lamps), I think they
use 100x the steady state current as an upper figure. This is intended
to cover model and manufacturer variations.
With multiple lamps on a branch circuit (or whatever is driving them),
this can add up pretty quickly.
Why do you need to know?
<https://adlt.com.au/resources/led-inrush-currents/>
On 03-10-2024 06:02 am, Don Y wrote:
On 10/2/2024 1:32 PM, Don Y wrote:That's the link I mentioned seeing before. I was bury and only scanned
On 10/2/2024 12:13 PM, Martin Brown wrote:
On 02/10/2024 13:03, Pimpom wrote:
On 02-10-2024 03:21 pm, Jan Panteltje wrote:
On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened Pimpom >>>>>> <Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>: >>>>>>Ah, I should have formed my question more carefully. I know about
Does anyone have a figure for the switch-on inrush current of a
typical
9W LED bulb? Preferably for 230/240V.
Not sure wat the 'typical' circuit is, this is wha tI found in my
LED bulbs from Cina:
https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG >>>>>> peak current is limited by the 1uF series cap at 50 Hz here.
There are so many different LEDs around,...
those early bulbs. They were the precursors to modern ones that use
switching supplies. These later models are the ones I mean.
It is still likely to be fairly small since the cheap parts they use
are not capable of more. Only way to be sure for a specific brand is
to measure it. I'd expect no more than 2-3x its nominal operating
current. The reservoir capacitor is seldom bigger than needed to
avoid visible flicker and sometimes not even that on the cheap and
nasties.
For lighting *installations* (i.e., not individual lamps), I think they
use 100x the steady state current as an upper figure. This is intended >>> to cover model and manufacturer variations.
With multiple lamps on a branch circuit (or whatever is driving them),
this can add up pretty quickly.
Why do you need to know?
<https://adlt.com.au/resources/led-inrush-currents/>
it briefly.
On 03-10-2024 06:02 am, Don Y wrote:
<https://adlt.com.au/resources/led-inrush-currents/>That's the link I mentioned seeing before. I was bury and only scanned it briefly.
For lighting *installations* (i.e., not individual lamps), I think they
use 100x the steady state current as an upper figure. This is intended >>> to cover model and manufacturer variations.
With multiple lamps on a branch circuit (or whatever is driving them),
this can add up pretty quickly.
Why do you need to know?
<https://adlt.com.au/resources/led-inrush-currents/>
Thanks for the link - that seems definitive and on high end units too.
I had perhaps naively assumed that they would put a small inductor in series with the thing to limit worst case inrush current. It is only for a very very short time though ~100A for <1ms which real fuses won't even see and most domestic circuit breakers probably won't either.
By comparison the arc caused by a filament spotlamp in the kitchen going pop bang almost always exceeded the max trip current by some margin.
My lighting circuits are now almost exclusively LED based and I have never seen
any signs of trips. Although I never put all the lights on at once and then done a system mains power off/on at the breaker box.
That is about the only time that this 100A surge risk becomes a problem. One of
my switched loads is 10x 7W LED candle lamps and has never caused a problem. Back when it was 10x 40w incandescents it was a heat source!
Does anyone have a figure for the switch-on inrush current of a typical
9W LED bulb? Preferably for 230/240V.
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