Technical data

QUICKTRONIC
®
Intelligent DALI DIM | Additional properties of dimmable control gears from OSRAM
34
Dimmable QTi ECGs from OSRAM hold their temperature
constant at the t
c
measuring point within a wide range and,
therefore, also the temperature in the luminaire. As a result,
the ECG components, as well as all other luminaire compo-
nents, are relieved.
This is achieved through a reduction of the system power.
Despite this, the luminous fl ux of the luminaire rarely de-
creases because the effi ciency of the system increases
through power reduction control.
The clear increase in the system’s relative luminous effi cacy
shows that the temperature limitation has an energetically
positive effect on hot luminaires.
Example: Tight 2-x-80-W-T5 luminaire
(applies for luminaires with direct heat feedback)
The exact scaling depends on the luminaire type and
the ECG installation conditions.
Luminaire ambient temperature [ °C]
Luminaire ambient temperature [ °C]
Luminaire ambient temperature [ °C]
Luminaire ambient temperature [ °C]
5
5
5
5
10
10
10
10
15
15
15
15
20
20
20
20
25
25
25
25
30
30
30
30
35
35
35
35
40
40
40
40
45
45
45
45
50
50
50
50
55
55
55
55
Temperature at the t
c
measuring point as a function
of luminaire ambient temperature
Luminous efficacy as a function of luminaire ambient
temperature
Relative power as a function of luminaire ambient
temperature
Relative power as a function of luminaire ambient
temperature
t
c
temperature [ °C]
Luminous effi cacy [%]
Relative power [%]
Relative power [%]
0
0
0
0
10
10
10
10
20
20
20
20
40
40
40
40
30
30
30
30
60
60
60
60
70
70
70
70
80
80
80
80
90
90
90
90
100
100
110
120
100
100
110
130
110
110
50
50
50
50
with without temperature limitation
with without temperature limitation
with without temperature limitation
with without temperature limitation