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|  PDSH 9968 n9 l0 U- A9 P" n j% c4 ]
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| Lamp current limit for HF lamps with no data for relevant HF reference ballast in data sheets, IEC 6 ...; I9 P, m1 [* n3 U- t8 Z
| 8.4# |6 W* f8 R2 S3 z- {
| 60929(ed.2) & 60929(ed.3) & 60929(ed.4)
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Standard(s):
0 @. [, G. k* mIEC 60929 All editions
2 v( q8 W. L. h2 h3 D" Z M& [Subclause(s): 8.4
7 R& |) X3 _* sNo. Year PDSH 0996 2010
0 L3 D# q5 S, s6 Z$ y( kCategory: LITE Developed by: ETF5 OSM/LUM+ T" c0 I1 l ^# ?+ J. s; p# S) g
Subject:. B' @' H$ W" X7 O e3 O2 i( ~
Lamp current limit for HF lamps with no data for relevant HF reference ballast in data sheets, IEC 60081 / IEC 60901 e. d6 U8 P+ t3 V
Key words:
' W$ ?$ W. m G8 D5 t- Lamp current0 b- G+ j$ S& [4 [+ [& h
- Lamp data sheet
* a0 O, G8 `; l4 R/ S3 C- Reference ballast
# `8 r; e& U% T+ o7 o/ j# g, c6 k5 X7 G/ @- Calibration current
) A" S0 F7 L3 x# bTo be approved at the 49th CTL Plenary Meeting, in 2012
: }7 ^8 s9 N4 v' FQuestion:
. g9 i9 F$ F# A' t7 E1 T2 P: R§ 8.4 of IEC 60929 states – “unless otherwise specified on the relevant lamp data sheet, the ballast shall
* R0 [# z, |" I0 Ilimit the current delivered to a reference lamp to a value not exceeding 115% of that delivered to the same8 L0 f( \9 c, t0 k! C
lamp when operated with a reference ballast”. Some lamps can operate at both 50 Hz or HF, but the
1 D! D" v! b7 T* q0 G4 Nreference ballast exists only for 50 or 60 Hz (for example 18 W G13). The lamp data sheet provides the
7 n4 d. @8 Z' m" |: l: j“typical HF lamp characteristics” (lamp wattage, lamp voltage, lamp current). Generally, the lamp current
5 M2 u' A; U6 k+ u3 c4 Win HF is lower than the lamp calibration current with 50 Hz reference ballast. Example, the HF current of, a6 [9 D. }. I& B7 A5 K) h4 y' {* p
the 18 W G13 is 290 mA in comparison with 370 mA for the calibration current with 50 Hz reference: R+ B, @! O" a- ^# j$ P
ballast (see 60081-IEC-2220-1). Should we use the HF current in the IEC lamp data sheet as the lamp3 K' e4 b/ X4 }0 X
current limit according to § 8.4?6 a6 R! y/ S. Y0 Z
Decision:, \% {; |) i( p. O+ i/ {
Yes.2 f) e, Z3 v, m% B2 V# ~
9 @, y7 \9 Q% l. x [2 m( v& n0 j, K: Y7 i6 g7 Y; W" l. X
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6 X- g) `4 s O) \% T. [
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发表于 2012-9-15 15:06
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