Universal dimmer actuators GDA2K-400 KNX / GDA4K-400 KNX
pdated: Mai-17 (Subject to changes) Page 49 of 63
4.3 Dimming energy-saving lamps (ESL)
4.3.1 General
Standard energy-saving lamps are not dimmable unless specifically denoted as dimmable.
There are also manufacturer- and type-related differences.
In particular with cold lamps, there are variations in switch-on brightness and performance.
Although the ESL mode of the dimmer takes account of the characteristic features of dimmable
energy-saving lamps, attention should be paid to the following points.
•
ESL can generally be connected in parallel, but it is recommended to only use the same type
of lamp on each channel.
•
The maximum output per device is 2 x 80 W or 1x 140 W
•
The minimum output per channel is 5 W
•
When dimming down rapidly (e.g. jumping configured, dimming value from
100% to 20%), there may be a brief flickering even with "warm" lamps.
•
Brightness values that are too low (below 20%, sometimes even below 35%) can lead to
flickering. Flickering can have a negative effect on the lifespan of the lamp similar to being
switched on and off.
•
When used with automatic switches (motion/presence detectors) the minimum switch-on time
of an ESL should not be < 5 minutes indoors or < 10 minutes outdoors. This prevents frequent
switching on and off and extends the service life of the light.
To avoid dimmable ESLs flickering or not coming on at all, it is always switched on with a high
dimming value and then reduced to the desired brightness within a minute.
This has a compensating effect, as cold ESLs normally have a reduced switch-on brightness:
It can take up to 5 mins to reach full brightness, depending on manufacturer, type and ambient
temperature.
To be able to dim dimmable ESL without problems, the dimmer offers two special modes
for dimmable energy saving lamps with RC or L-response.
These modes also take account of the varying characteristic curve in comparison with the incandescent
lamp, i.e. the relationship of the set percentage value to the emitted brightness in relation to maximum
brightness.
IMPORTANT:
Certain LED lamps can no longer be dimmed down if they are controlled with a dimming value
of > 90%.
With the GDA2K-400 KNX / GDA4K-400 KNX, even these lamps can be dimmed.
For this, the load selection LEDs (RC, 0-90%) is used.
