A lamp blew and then...
 

Got a funny. Dimmers are V-Pro. The sort where you can change from leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.

--
*Why is "abbreviated" such a long word?

Dave Plowman London SW
To e-mail, change noise into sound.

A lamp blew and then...
 

Dave Plowman wrote:

an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.

Does it do the same if run, at say, half-brightness?

A lamp blew and then...
 

On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.


If not already done, check it's not a faulty lamp by running it on a
non-dimmed circuit.

--
Robin
reply-to address is (intended to be) valid

A lamp blew and then...
 

On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.


Lamp or dimmer?

Have you tried the lamp without the dimmer circuit to see which
component is causing the problem? If fitting the bulb somewhere else
just make sure that it is in the same orientation.

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

A lamp blew and then...
 

On 25/02/2021 12:01, alan_m wrote:
On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from
leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.


Lamp or dimmer?

Have you tried the lamp without the dimmer circuit to see which
component is causing the problem? If fitting the bulb somewhere else
just make sure that it is in the same orientation.


The instructions give another mode of operation (mode 3) trailing edge -
have you tried this?

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

A lamp blew and then...
 

On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.

I don't know what is in those dimmers, but I have a (fixed output)
supply to LED downlighters in the bathroom. The set is well inside its
power output range, but flashes on and off, unless there is one halogen
bulb fitted.

I have tried a number of different units, but they all behave the same.

Oddly, the first one that I fitted was fine - for about 18 months, then
started doing this!

A lamp blew and then...
 

In article ,
Andy Burns wrote:
Dave Plowman wrote:

an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.

Does it do the same if run, at say, half-brightness?

No. If you turn the dimmer down to the point where the lamp dims (the
first few degrees make no difference) it stays at constant level.

The instructions with it says you can set both a maximum and minimum level
(it's not the first V-Pro I've bought) No problem setting a minimum level,
but the max seems to stay the same.

Odd, really. I could understand problems near minimum. Or perhaps on a
fully loaded circuit. But the dimmer spec is 0-100 watts of LEDs, and this
is just one at 10w. Same happens with a spare bulb.

--
*One nice thing about egotists: they don't talk about other people.

Dave Plowman London SW
To e-mail, change noise into sound.

A lamp blew and then...
 

In article ,
alan_m wrote:
On 25/02/2021 12:01, alan_m wrote:
On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from
leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.


Lamp or dimmer?

Have you tried the lamp without the dimmer circuit to see which
component is causing the problem? If fitting the bulb somewhere else
just make sure that it is in the same orientation.


The instructions give another mode of operation (mode 3) trailing edge -
have you tried this?

I'll have to look again, but think this is the default setting.

--
*Certain frogs can be frozen solid, then thawed, and survive *

Dave Plowman London SW
To e-mail, change noise into sound.

A lamp blew and then...
 

On 25/02/2021 12:36, Steve Walker wrote:
On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from
leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.

I don't know what is in those dimmers, but I have a (fixed output)
supply to LED downlighters in the bathroom. The set is well inside its
power output range, but flashes on and off, unless there is one halogen
bulb fitted.

I have tried a number of different units, but they all behave the same.

Oddly, the first one that I fitted was fine - for about 18 months, then
started doing this!

Got the same issue. need to replace dimmers


--
In a Time of Universal Deceit, Telling the Truth Is a Revolutionary Act.

- George Orwell

A lamp blew and then...
 

On 25/02/2021 14:54, Dave Plowman (News) wrote:
In article ,
alan_m wrote:
On 25/02/2021 12:01, alan_m wrote:
On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from
leading
to trailing edge and set a minimum and maximum level. Out of the box, the
one driving the single central pendant, which is an Osram 10w 100mm LED
globe type, at switch on at full is fine. But after a few minutes chops
down to a lower level, then chops back up. And continues to do this. Like
over current protection was cutting in.


Lamp or dimmer?

Have you tried the lamp without the dimmer circuit to see which
component is causing the problem? If fitting the bulb somewhere else
just make sure that it is in the same orientation.


The instructions give another mode of operation (mode 3) trailing edge -
have you tried this?

I'll have to look again, but think this is the default setting.

There are two trailing edge modes (and one leading edge mode)
https://www.youtube.com/watch?v=Id1E2hQpX-w

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

A lamp blew and then...
 

On 25/02/2021 18:56, alan_m wrote:
On 25/02/2021 14:54, Dave Plowman (News) wrote:
In article ,
Â*Â*Â* alan_m wrote:
On 25/02/2021 12:01, alan_m wrote:
On 25/02/2021 11:24, Dave Plowman (News) wrote:
Got a funny. Dimmers are V-Pro. The sort where you can change from
leading
to trailing edge and set a minimum and maximum level. Out of the
box, the
one driving the single central pendant, which is an Osram 10w 100mm
LED
globe type, at switch on at full is fine. But after a few minutes
chops
down to a lower level, then chops back up. And continues to do
this. Like
over current protection was cutting in.


Lamp or dimmer?

Have you tried the lamp without the dimmer circuit to see which
component is causing the problem? If fitting the bulb somewhere else
just make sure that it is in the same orientation.


The instructions give another mode of operation (mode 3) trailing edge -
have you tried this?

I'll have to look again, but think this is the default setting.

There are two trailing edge modes (and one leading edge mode)
https://www.youtube.com/watch?v=Id1E2hQpX-w


That would be my first thought, Try the other modes.

--
Adam