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12 Appendix
Control gear
appendix
Electronic control gear (HFG) for fluorescent lamps
More efficient working through high frequency lighting
Apart from the economical and ecological points of view, there
are also more very positive consequences of high frequency light
to the working person. New research in the area of ergonomics
verifies the studies of the engineering office of Christian
Bartenbach, Innsbruck, Austria. Flicker is a serious problem factor
in visual comfort. This is made worse when working in a VDU
area. The consequences are fatigue, lack of concentration and
more mistakes. Using fluorescent lamps and HF gear it is possible
to work without flicker in contrast to conventionally operated
lamps. This leads to many proven advantages and generally more
comfortable work places.
Comfort
• Instant start
• Pleasant, flicker-free light without stroboscopic effects due to
high frequency operation
• High visual comfort without disruptive low-frequency noises
• No flashing and flickering, defective lamps are switched off by
the electronic fault supervision circuit
Safety
• Safety switch off of current supply to defective lamp
• Over voltage protection switching for short term voltage
impulses (corresponding to DIN VDE 160 standards) and for
temporary over voltage
• Possibility of using in emergency lighting equipment according
to DIN VDE 0108.
Life expectancy and reliability of electronic control gear
The failure rate of electronic components depends on the build
quality of the units and the ambient temperature. The OSRAM
electronic control gear units are designed in such a way so that
under the maximum permitted operating temperature (tc
max=70°C), a failure rate is expected of less than 0,2% per 1000
operating hours. This corresponds to an expected life time of
50000h at a failure percentage of less than 10%. If the operating
temperature is reduced by 10 degrees the failure rate can further
be reduced by a factor of 2.
HFG life expectancy – calculated values
100%
80%
60%
Operating units HFG
50¡C
HFG for T8 lamps
Economy
• 27% lower power consumption
• 50% longer lamp life, leading to lower maintenance costs,
fewer lamp and ballast changes required
• Lower load for the air-conditioning through lower heat build
up within the luminaires
100%
90%
80%
70%
60%
50%
0
Relative light output
Life expectancy
HFG for T5 lamps
Switchstart/low-loss
2.000 4.000 6.0008.000 10.000 12.000 14.000 16.000 18.000 20.000 22.000 24.000 (h)
Burning hours
Increased lamp life expectancy (at 80% still operating)
from 10000 hours at IEC-3 standard operating cycle
(165 min. on / 15 min. off)
HFG
The T5 lamps herald a new generation of modern lighting
systems. They are distinguished by their smaller lamp diameters
(d=16mm) and slim ballasts. The operation of T5 lamps is only
possible with electronic control gear.
Two product ranges
1. T5, high efficiency (HE), optimised for max. light efficacy (up to
104lm/W), in wattages 14W, 21W, 28W and 35W
2. T5, high output (HO), optimised for max. light output (up to
7000lm for 80W), in wattages 24W, 39W, 49W and 80W.
Economy
• Very high system efficacy from T5 high efficiency (HE), in
particular through »Cut Off technology«
• High lumen package from T5 high output (HO)
• High lamp life expectancy through gentle lamp operating with
»Cut Off technology«
• Low maintenance costs through high lamp life expectancy and
reduced relamping intervals
• Lower load for the air-conditioning through lower heat build
up within the luminaires
40%
20%
90 C
70¡C
60¡C
0
0 20 40 60 80 100 120 140
Working hours x 1000