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我将有关文字复制在此：
( H: a& z: C; Z20 Functional safety (EBLF)
) ~1 F8 I; }6 r& i; R0 p2 PThe appropriate lamp associated to the ballast shall provide the necessary light output after
1 X1 B/ O$ x. `change over to the emergency mode. This is verified if the declared Emergency ballast lumen$ k+ ^! ~5 A m4 \; c) E7 v
factor (EBLF) is achieved during emergency operation at 25 °C.
s$ i( B# l+ p5 MCompliance is checked by the following test:
8 `) G; m' U7 ?a) ballast provided with batteries: j2 ^, s( z0 N* s9 v
The voltage supplied to the ballast by the batteries is continuously measured during
* i' q& h& o7 w7 B, c5 k0 @emergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The/ Y s- o+ V/ K0 X
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
% m1 ~. ?+ a2 j/ k3 Rfailure of the normal supply and the end of rated duration of operation are retained for the9 d Y( Z2 K. L7 w) _6 x) K
EBLF measurement.8 c a5 N/ U" D
b) ballast not provided with batteries and designed for d.c. central supply system:
6 D7 [. q$ y, _* wThe rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
- P! {2 p( T5 e9 v, O Lretained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the/ e! M# k% Y8 ~
rated voltage (V1) unless specifically advised of a different value by the control gear
6 k+ r k& X2 R5 r+ @8 Nmanufacturer.- I* q F9 N4 j4 u" l
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause$ H0 v; K9 {9 [, l5 n
22.16.1
$ G0 a# u* q5 g. n4 zMeasurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and
; Z" S9 E2 S a# b6 q4 w% Ohaving not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,
' c/ c3 J9 ~) w2 ^7 `0 mthen in steady conditions at Vmin.
$ X3 w9 C# E! y. b- [: xThe lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall2 f3 m# D+ P7 v" v2 o8 K4 d- ]
be retained and shall reach at least the declared EBLF.
, T# v3 l5 \! H G- \' xThe value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.
' l7 d H- P3 ?# y) e- dNOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.
9 ?# T) i' n! ~* M. Q$ dAs declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.1 r0 A, }% e2 ]$ \% ]
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.
. e0 y/ c( O" {2 BNOTE 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.
! ]1 n' u7 W1 w6 M% e3 w( ]% l0 m" g; l$ S
F译得不错。" ^7 f/ G8 { E# _: {" Q
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
