OSRAM DULUX F - Manual (Page 73)

Economical long-life light sources with plug-in bases
Compact Fluorescent Lamps OSRAM DULUX ®
Technical Guide
71
4.8 Lamp temperature, safety and limit values
Temperature measuring points are defined for OSRAM DULUX ® lamps. The temperatures measured
at these points must be within the thresholds for a safe and reliable operation of the lamps.
Measuring point Description Max. temp.
0
This point is located at the bottom of the base and is
determined by the thermal load capacity of the glow starter
installed in the bases of two-pin lamps for conventional
operation. It is therefore relevant only for these lamps
(OSRAM DULUX
® S, D, T and T IN).
90°C
1)
according to EN 60901
1
IEC
Measuring point
(old - for information)
Information for lamp holder manufacturers
Defined as the point lying between the tubes containing
electrodes on a line tangential to the tubes. The limit value for
this measuring point has been defined in the relevant
standard for safety reasons. (If this maximum temperature is
exceeded the plastic base may start to soften (applies to end
of life).
Refer to chapter 4.8.1
Maximum allowed temperature
and measuring conditions
according to IEC 61199.
1*
IEC measuring point
(new)
For luminaire manufacturers
Defined as the point lying between the tubes containing
electrodes on a line tangential to the tubes. The limit value for
this measuring point has been defined in the relevant
standard for safety reasons. (If this maximum temperature is
exceeded the plastic base may start to soften (applies to end
of life).
Refer to chapter 4.8.1
Maximum allowed temperature
and measuring conditions
according to IEC 61199.
3
Cold spot measuring
point
Applies only to OSRAM DULUX ® two-pin and OSRAM
DULUX ® four-pin Valid for Cold spot lamps. Corresponds to
the cold spot for base-up measuring burning position and a
free-operating lamp. Under certain circumstances, however,
the cold spot may shift to somewhere else on the lamp
surface than measuring point 3.
Exceeding the maximum permitted temperature has a
considerable impact on the electrical and photometric data of
the lamp and will cause the lamp to fail.
For CFL Square lamps the cold spot is located inside the
lamp cap. For measuring purposes specially prepared lamps
are necessary.
In magnetic and ECG operation
max. 100°C (approx. <50%
luminous flux) optimum 40°-50°C
(=100% luminous flux)
3
Temperature limit for
lamp performance of
CONSTANT lamps
For safety reasons a new measuring point located on the
glass bend of the lamp was defined.
Ecxeeding the maximum permitted temperature on
measuring point 3 has a considerable impact on the
electrical and photometric data of the lamp and can lead to
lamp failures or a reduced lamp life time. OSRAM DULUX ® L CONSTANT
40W, 55W, 80W, maximum
125°C
OSRAM DULUX
® T/E CONSTANT
26W, 32W, 42W, maximum
150°C
Amalgam measuring
point
CONSTANT lamps : The measuring point for CONSTANT
lamps is located on the glass tip of the amalgam reservoir
inside the lamp base. This temperature can be measured only
with specially prepared lamps.
DULUX T, T/E CONSTANT,
optimum amalgam temperature
100°C – 160°C (= 90% luminous
flux)
Measuring point for
DULUX
® L CONSTANT is not
accessible.
1) Measuring Conditions:
25°C ambient temperature, draught free air
Reference ballast
Supply voltage U
V
=1.06 × U
rated
CFL SQUARE ®
1