[Message Prev][Message
Next][Thread Prev][Thread Next][Message
Index][Thread Index]
RE: New lighting wiring
I sort of guessed that they wouldn't dim but would just come on or go
off =
as the dimmer reached the voltage threshold. I just wondered if this
would=
actually have any detrimental effect on the transformer itself ?
=20
Marcus=20
________________________________
From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of R=
ichard
Sent: 25 January 2008 12:45
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] New lighting wiring
=20
I have tried it with some MR16 sized LED globes - they had a really small
range of motion of the dimmer to go from full to nothing - to be expected
since there is a smoothing cap in the globes to remove flicker so it will
still get the peak voltage they expect down to the point they are only
getting =BD the ac cycle.
Little bit lower and they were out.
I trued a GU10 based mains powered MR16 and the results were... shall we
sa=
y
that smell lingers...
From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
[mailto:ukh=
a_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
] On Behalf Of
Marcus Warrington
Sent: Friday, January 25, 2008 3:55 AM
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>=20
Subject: RE: [ukha_d] New lighting wiring
The LED's are in the bathroom so are definitely transformer fed (12v and
on an RCD spur).
Does the minimum load rating still apply with the transformer and how
do I calculate the load of the transformer ?
If the dimmer is ramped up (i.e. slow start like a LD11 does) would the
transformer cope with that or would it better to simply "toggle"
between
0% and 100% ?=20
Marcus=20
________________________________
From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukh=
a_d%40yahoogroups.com>
[mailto:ukha_d@xxxxxxx
<mailto:ukha_d%40yahoogroups.com>
<mailto:u=
kha_d%40yahoogroups.com> ] On Behalf
Of Richard
Sent: 24 January 2008 10:42
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_=
d%40yahoogroups.com>=20
Subject: RE: [ukha_d] New lighting wiring
Transformer based should be ok because the transformer should eat the
leakage current.
The problem are the 230 volt leds because they have a series capacitor
to
drop the voltage so overheat on anything with harmonics.
From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukh=
a_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
[mailto:ukha_d@xxxxxxx
<mailto:ukha_d%40yahoogroups.com>
<mailto:u=
kha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
] On
Behalf Of
Marcus Warrington
Sent: Thursday, January 24, 2008 11:21 PM
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_=
d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>=20
Subject: RE: [ukha_d] New lighting wiring
Ahh yes, forgot about the *minimum* load requirements of an LD11. :-(
Marcus=20
________________________________
From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukh=
a_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
[mailto:ukha_d@xxxxxxx
<mailto:ukha_d%40yahoogroups.com>
<mailto:u=
kha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
] On Behalf
Of Neil Ball
Sent: 21 January 2008 17:23
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_=
d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>=20
Subject: RE: [ukha_d] New lighting wiring
That *may* be ok as the overheating problems/catastrophic failures were
to
do with CFL lamps not LEDs. That said there could be problems if the LED
load is below the minimum load of the dimmer - I've seen LEDs flashing
on/off when the dimmer was supposedly in the off state - was a Lutron
leading edge dimmer from their Homeworks system though so an X10 dimmer
may
have a different effect.
Neil B.
_____=20
From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukh=
a_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
[mailto:ukha_d@xxxxxxx
<mailto:ukha_d%40yahoogroups.com>
<mailto:u=
kha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
] On
Behalf Of
Marcus Warrington
Sent: 21 January 2008 15:29
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_=
d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>=20
Subject: RE: [ukha_d] New lighting wiring
Ho Hum... I guess my plan to use an LD11, toggled 0% to 100% (by
Homevision) , as a quite relay to turn on some 12v LED bathroom lighting
(running on a 240v transformer) probably isn't a good idea then.
Marcus=20
__________=20
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
=20
[Non-text portions of this message have been removed]
UKHA_D Main Index |
UKHA_D Thread Index |
UKHA_D Home |
Archives Home
|