PDSH 996 Lamp current limit for HF lamps with no data for relevant HF reference
http://decisions.iecee.org/icons/ecblank.gif PDSH 996
Lamp current limit for HF lamps with no data for relevant HF reference ballast in data sheets, IEC 6 ...
8.4
60929(ed.2) & 60929(ed.3) & 60929(ed.4)
Standard(s):
IEC 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:
- Lamp current
- Lamp data sheet
- Reference ballast
- 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
limit 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
reference 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
in 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?
Decision:
Yes.
页:
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