Burning-In Of Lighting Equipment - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
4.6

Burning-in of lighting equipment

In the case of lamps filled with gas, a burn-in time is recommended. This burn-in process is only required
once at the start of commissioning.
Only after this burn-in time do fluorescent lamps have a stable operating value, which ensures the best
possible dimming behavior and an optimum service life. An optimum pressure level is created in the
fluorescent tube by burn-in.
For installations with dimmable ballasts, many lamp manufacturers make a recommendation that a burn-in
time of 20 to 100 hours must be observed. The recommended values are about 20 hours for T8 lamps and
100 hours for T5 lamps. The exact values are available from the lamp manufacturers. During the burn-in
time, the lamps are only switched on at maximum capacity. Dimming is not possible.
The information about burn-in times can often not be found in the catalogue of the lamp manufacturer but
in the descriptions of the electronic ballasts, as the burn-in time only becomes relevant with dimmable
systems. Stable operating values and reproducible brightness values are a prerequisite in these
installations. Moreover, only poor evaporation of the solid or fluid additives is possible for dimmed lights
due to the reduced capacity, so that in certain circumstances the maximum light yield is only achieved at a
later date or not at all. This can lead to the complete replacement of the lamps.
According to statements of lighting planners, if fluorescent lamps (particularly T5 lamps) are not burned in,
they can even be damaged, causing them to fail prematurely.
With the DALI Light Controller, it is possible to activate a burn-in time via the communication object Burn-in
lamps/Status and to place individual lighting groups or all lighting groups on the DALI Light Controller in
the burn-in state. The lighting groups, which are considered for the Burn-in function, can be set via
parameters. During this time, the lamps can only be switched on with 100 % or switched off. Dimming is
not possible.
The Burn-in function can be activated for all the lighting groups together (DALI output) or by using an
additional communication object for each lighting group individually (group x). In the
Group, page 67, every lighting group can be approved for burn-in with the parameter Enable central
function Burn-in object "Burn-in lamps/Status". The activation of the Burn-in function can be undertaken
centrally via the communication object DALI output or per lighting group via the Group x communication
objects.
The DALI Light Controller features a separate hour counter (1...255 h) for each individual DALI device for
the Burn-in function. The accuracy of the timing is set internally to five minutes, even though the time is
counted in hours. The DALI Light Controller only indicates the burn-in state but not the remaining or
elapsed burn-in time.
If the lamp is switched off during the activated burn-in time, the burn-in counter stops the counting process.
Should the lamp be switched on again, the counting process will continue and the remaining time will be
rounded off to the nearest five minute step.
On light controller supply voltage failure or KNX bus voltage failure on the DALI Light Controller, the
elapsed burn-in time is stored and continues to be used after voltage recovery. The same applies after a
download.
Parameter window Gx
DLR/S 8.16.1M | 2CDC 507 100 D0202 165