PDSH 996 Lamp current limit for HF lamps with no data for relevant HF reference

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PDSH 996 6 R! m" E- \- x% a1 r+ @ $ @# [! p" L; ?- R) U$ l

Lamp current limit for HF lamps with no data for relevant HF reference ballast in data sheets, IEC 6 ...

8.4 : `1 v8 M5 y3 t7 p

60929(ed.2) & 60929(ed.3) & 60929(ed.4)

% l( B# y$ @/ x' RStandard(s):
7 v1 j5 C8 W! JIEC 60929 All editions
Subclause(s): 8.4
No. Year PDSH 0996 2010
Category: LITE Developed by: ETF5 OSM/LUM
Subject:
Lamp current limit for HF lamps with no data for relevant HF reference ballast in data sheets, IEC 60081 / IEC 60901
Key words:
, ?8 i" k: d8 |9 m- n( C; {- Lamp current
/ P8 V+ u# |5 ~! ^" t; ~- Lamp data sheet
0 [. z  p( `7 Z& Q, H+ Y- Reference ballast
6 ]6 P3 C3 s; ?2 q# g0 Z- Calibration current
To be approved at the 49th CTL Plenary Meeting, in 2012
Question:
§ 8.4 of IEC 60929 states – “unless otherwise specified on the relevant lamp data sheet, the ballast shall
( K8 }, b- ^2 ]& Tlimit the current delivered to a reference lamp to a value not exceeding 115% of that delivered to the same
lamp when operated with a reference ballast”. Some lamps can operate at both 50 Hz or HF, but the
4 P. u0 f0 R/ \8 U$ oreference ballast exists only for 50 or 60 Hz (for example 18 W G13). The lamp data sheet provides the
“typical HF lamp characteristics” (lamp wattage, lamp voltage, lamp current). Generally, the lamp current
+ _3 v4 ]! r8 j6 M4 ain HF is lower than the lamp calibration current with 50 Hz reference ballast. Example, the HF current of
the 18 W G13 is 290 mA in comparison with 370 mA for the calibration current with 50 Hz reference
ballast (see 60081-IEC-2220-1). Should we use the HF current in the IEC lamp data sheet as the lamp
current limit according to § 8.4?
$ D% g9 G* y/ h4 a# x* tDecision:
% Y3 s+ @/ d, l0 Z4 qYes.


/ b* w+ A6 R8 M, F/ e  ^# d