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我将有关文字复制在此：
# J& \6 t! H/ G( ~20 Functional safety (EBLF)$ ]0 q( A0 Z) t1 M2 l3 l
The appropriate lamp associated to the ballast shall provide the necessary light output after
4 ?1 E: ?+ e* d4 Z4 g+ V9 Gchange over to the emergency mode. This is verified if the declared Emergency ballast lumen
4 g* d. E4 C& y) X/ Jfactor (EBLF) is achieved during emergency operation at 25 °C. ]2 } w, ~3 E O9 V) y
Compliance is checked by the following test:
0 _) m) @: |/ P. w4 wa) ballast provided with batteries:
9 T& M3 I5 c# tThe voltage supplied to the ballast by the batteries is continuously measured during+ T8 S& p' b E2 K
emergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The
; V% u6 F$ f/ Y5 d: {values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after. b; p7 U4 J' m2 A
failure of the normal supply and the end of rated duration of operation are retained for the+ i3 Y. |+ B( }6 e8 C
EBLF measurement.
( @# E1 b* O9 e5 H3 _9 bb) ballast not provided with batteries and designed for d.c. central supply system:+ c, G) F) w9 q
The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
; g. P8 u1 O* g8 Kretained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
y2 ` h' Z; \* Wrated voltage (V1) unless specifically advised of a different value by the control gear; Q& S. q) i) ~5 ]/ O+ A1 Y
manufacturer.
: V6 c7 X" x; ?" \" \5 uNOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause
9 \4 O' M$ @# N( ?2 W3 U22.16.1
; @. U4 F, A9 `# C1 b) v5 RMeasurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and% d* z3 g$ r; L, s5 J
having not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,# e+ v! A8 {& U* u% x- M2 d) G6 U
then in steady conditions at Vmin.
( k+ ^, m7 c9 B0 q4 m7 uThe lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall' h8 i7 _7 T# o7 }! u
be retained and shall reach at least the declared EBLF.
) w+ C+ ~3 W9 w) o$ M2 ?: FThe value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.
1 j2 m+ k+ ~( `* ]9 K; @* d) A+ sNOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.% l6 _3 `7 {; t) w1 Z b' A, K
As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.2 l+ b/ b+ V; g) @7 W0 R1 k
Any test circuit corresponding to that of Figure 1 can be used to make the measurement of EBLF. The luminous flux of a lamp is usually measured with an integrating photometer. For ratio measurements of luminous fluxes, a suitable illuminance meter is sufficient as there is a close relationship between luminous flux and illumination at a fixed point.
$ \" i0 K7 T0 z1 h! @6 wNOTE Other methods may apply for determining EBLF in particular methods which record permanently the luminous flux of the lamp associated to the ballast under test.
2 y2 ^$ O9 f |4 E, \. j2 j* Q" m" E* R% g" ]
F译得不错。
% }% W# G7 ?1 w% v! h但是否注意到红字表示的地方，是否有对应关系？前面红字及相关部分如何译好？ |
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发表于 2007-8-29 15:24
发表于 2007-8-29 16:20
