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我将有关文字复制在此：4 h+ A5 v6 Z1 n& P5 E( w
20 Functional safety (EBLF)6 S6 K! \: b1 i# c% D1 a2 d
The appropriate lamp associated to the ballast shall provide the necessary light output after6 _, {$ Q, H5 s' l x+ \1 x1 R! \
change over to the emergency mode. This is verified if the declared Emergency ballast lumen
- h4 P" Q! P, |2 P0 @! s+ cfactor (EBLF) is achieved during emergency operation at 25 °C.
3 \( P' k4 q+ B' YCompliance is checked by the following test:+ u8 s! u" v7 @; Q8 `
a) ballast provided with batteries:
9 \7 }2 y/ \1 ^% C; dThe voltage supplied to the ballast by the batteries is continuously measured during
5 W8 K* @% M" T8 K5 [; Cemergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The ~6 H0 \! D" p7 C7 l) U, C- L' ~
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
; c8 |9 l1 T4 S# Efailure of the normal supply and the end of rated duration of operation are retained for the
/ {4 _; T* y" DEBLF measurement.' _4 k, H. Y2 S4 r2 Y; F" u' ?
b) ballast not provided with batteries and designed for d.c. central supply system:+ s4 x8 A& m& x U) q
The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
7 P, N4 o' p; {4 pretained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
: m# I, C5 ~/ J, n* Crated voltage (V1) unless specifically advised of a different value by the control gear6 ~3 m" D0 b. b
manufacturer.& t4 V/ b1 {4 Y% @9 E
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause! Y# M' z' ?; b0 B% d, D
22.16.1
* P) c& t; f6 U( l# BMeasurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and' U: C* U- j4 Z3 i i, v
having not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,2 m1 g/ d0 X" `: P: r
then in steady conditions at Vmin.
/ R$ [8 M; V# \- _. v# _The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall
; ^% j5 C$ z! C" L! sbe retained and shall reach at least the declared EBLF.7 s+ k& H0 I. n
The value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.6 h7 K# V( O: v: j$ y
NOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting." p' T) h7 x9 Q: e
As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.9 F5 }8 Z: @/ {7 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.
/ j1 B/ s9 q( y: ENOTE 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.+ c/ d% V- y) c
+ F0 y2 P5 w7 x$ j6 X9 k$ QF译得不错。
6 R" f6 c6 z- Y- }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