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我将有关文字复制在此：
" F! z6 m8 A9 c* I: n20 Functional safety (EBLF)
2 S% W- {! p3 i$ [1 f! G1 i4 sThe appropriate lamp associated to the ballast shall provide the necessary light output after
3 L" w Y8 A" }$ {$ B* schange over to the emergency mode. This is verified if the declared Emergency ballast lumen
! m, z2 ^! W, F4 O3 Q# m, ffactor (EBLF) is achieved during emergency operation at 25 °C.. G5 K! S! {2 M$ H0 {
Compliance is checked by the following test:
C3 Q& R, [$ ?1 S1 h y8 J6 n. p7 x2 Pa) ballast provided with batteries:% _, Q/ `) P9 I1 U0 c! K
The voltage supplied to the ballast by the batteries is continuously measured during
! z1 n- g1 L4 j+ I# S- _emergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The6 }: p1 r+ G0 F; i
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
' V* o* M. L4 W; w" A4 o9 bfailure of the normal supply and the end of rated duration of operation are retained for the: r* ^/ Y" N5 L8 V& U
EBLF measurement.
0 x4 ]7 W. d6 H5 qb) ballast not provided with batteries and designed for d.c. central supply system:- j* x1 f2 R( B
The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are! R' N2 m% a1 \* P( e
retained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
- z- D ?4 l9 U3 g! f9 F1 X4 Q" f# erated voltage (V1) unless specifically advised of a different value by the control gear
$ v, t: p4 ]5 d/ F$ A- [! d! cmanufacturer.0 ]+ `& o& b1 ^8 ^# g
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause( W7 L; C8 c! M) M% l3 B! J
22.16.1( |# {9 `' D; C' {
Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and
" ~8 C' I+ Z+ p5 V8 D+ ehaving not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,& m# l. m6 p% m1 F" @
then in steady conditions at Vmin.4 l1 @+ n8 q1 E! w; Z, I
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall* W+ n/ E- e" W, f! Y: Y5 z
be retained and shall reach at least the declared EBLF.
( Z1 J- J5 w- L9 b0 @6 R& nThe value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.
, V! w8 Z, t- w3 YNOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.
3 c. A! ? i4 JAs declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.
" M9 u2 p. N" I4 `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.
3 e9 q) I( B7 H1 J: \5 @NOTE 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.# F, d# a# D8 V5 C# b4 }
" N; {6 A' p. i) O+ I* G$ M1 d0 g
F译得不错。
. \+ y# M4 L+ y5 C2 e" I) i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