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我将有关文字复制在此：
! J% w, L8 g% g1 y) U0 j6 q6 t& X20 Functional safety (EBLF)
/ V. L b9 u$ i" B9 G- p& B! zThe appropriate lamp associated to the ballast shall provide the necessary light output after
, Y' F8 B; y; K. p2 E5 l$ Q: w- Uchange over to the emergency mode. This is verified if the declared Emergency ballast lumen W4 l$ E4 T9 D# \! k
factor (EBLF) is achieved during emergency operation at 25 °C.
( j1 T: o$ m( Z2 F e1 nCompliance is checked by the following test:) E" R1 X( ]% V
a) ballast provided with batteries:
1 `6 [# f/ V" J! Q. jThe voltage supplied to the ballast by the batteries is continuously measured during
% {8 O$ ~' @2 f2 Iemergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The
' r* |- |, F+ w8 ^2 v: nvalues measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
* O0 g/ M1 U7 o4 Ifailure of the normal supply and the end of rated duration of operation are retained for the
$ r0 Z4 b+ u) _: x! iEBLF measurement.
v+ j4 q2 O; f. {/ H' e% |( C7 x! lb) ballast not provided with batteries and designed for d.c. central supply system:
1 M" B( Q& W, I' dThe rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
( w! D- v4 O" e, ]retained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the' R- K* Y7 `/ U* G
rated voltage (V1) unless specifically advised of a different value by the control gear
: s% s3 V3 l0 I T9 u, omanufacturer.
6 c9 t) a5 o3 o& L. hNOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause
d7 H( h4 q$ W5 F1 M4 L3 g4 v22.16.1
$ T0 W; G5 c6 _Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and% G6 V0 s7 v6 @7 ^( U5 j+ {" v9 N
having not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,3 u; V# d; b+ U* g" c; |6 U
then in steady conditions at Vmin." [. D' N) ^ K6 w) F
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall4 w0 @: n @0 X( ^3 z
be retained and shall reach at least the declared EBLF.9 z0 a/ @ W8 F% h, S! f# l
The value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.
4 k1 k7 y, K3 _# DNOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.
# }1 s/ c5 N7 [3 yAs declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.# A8 x O) _# }' x& q& \ ?' c
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.
$ l$ A( [6 J, g, q- \9 fNOTE 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.6 I \$ m& A) J* p4 t
3 _8 f- }, g& R5 G
F译得不错。$ Q; j) j7 l/ ?, `( 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