D7BCT datasheet(36/54 Pages) OSRAM

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OSRAM DULUX® EL – electronic energy saving lamps

Economical alternatives to ordinary light bulbs

Technical Guide

3.4.3 Notes on

luminaire design

Burning position

Because of the thermal conditions on the lamp there are significant differences in

the luminous flux/temperature curve for base down, base up and horizontal burning

positions (see 3.4.1). The base down position is recommended for all applications in

which low ambient temperatures are expected.

If lamps are to be installed in the base down position in outdoor luminaires it is

important to ensure that no water (e. g. condensate in the luminaire) can penetrate

into the electronic circuitry between the glass and the base casing. (cf. 3.8/Suitability

for outdoor applications)

3. Lamp data and lamp properties

3.5

Power supply

3.5.1 Dependence on

mains voltage and

mains frequency

OSRAM DULUX® EL lamps operate ideally on AC voltage in the range from 198 V to

254 V (according to DIN IEC 38).

The electrical data of lamps differs according to the mains voltage. The changes are

substantial in the case of an incandescent lamp, but minimal in the case of OSRAM

DULUX® EL.

As the voltage increases, the output and the luminous flux change very little (Fig. 14).

This behaviour is welcome in view of the frequent overvoltages in the mains supply.

Voltages up to 254 V have virtually no effect on the life of an OSRAM DULUX® EL

lamp, in contrast to the situation with incandescent lamps. The luminous efficacy of

OSRAM DULUX® EL lamps as a measure of the efficiency with which

electrical power is used is virtually unaffected by changes in the mains voltage in the

range of - 10 % to +10 %.

Fig. 14:

Electrical data as a function of the supply voltage

OSRAM DULUX® EL lamps can be operated at any standard mains frequency and are

largely unaffected by fluctuations in the mains frequency.

130

120

110

100

200

210

220

230

240

250

Versorgungsspannung

Lichtausbeute

Lichtstrom

Leistungsaufnahme

Luminous efficacy

Supply voltage V

Luminous

flux

Power

input

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