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

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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):
6 S. l0 G2 w- G3 rIEC 60929 All editions
5 |) B+ _* x0 o  K* cSubclause(s): 8.4
, G5 l5 V" F. Q: n/ I; nNo. Year PDSH 0996 2010
( X- N' o) G' S/ d1 FCategory: LITE Developed by: ETF5 OSM/LUM
Subject:
3 y( C, `& }3 m3 l/ CLamp 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
0 G" H: f5 h. ?/ m, r9 |- Calibration current
5 V7 a) P, L- q# V; CTo be approved at the 49th CTL Plenary Meeting, in 2012
Question:
/ u  p6 y5 `- a& X- @  e" h1 z§ 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
5 u! X5 U" e2 N9 ]6 y: J9 S“typical HF lamp characteristics” (lamp wattage, lamp voltage, lamp current). Generally, the lamp current
0 H2 l5 ~! ?4 |; Q8 W, W  ~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
0 d9 Q! e: r+ r  cballast (see 60081-IEC-2220-1). Should we use the HF current in the IEC lamp data sheet as the lamp
) u* P8 @3 d9 J5 f+ x4 S9 \# r  acurrent limit according to § 8.4?
& x! t4 ]. w7 ]1 z1 b( O; {2 |Decision:
Yes.


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