|
|
我将有关文字复制在此：8 Y& ]+ c) n) z1 Q- J9 a) ^
20 Functional safety (EBLF)
]. g% F4 m2 C$ Q8 {, P7 ?/ oThe appropriate lamp associated to the ballast shall provide the necessary light output after* z7 J# T* T) o0 f7 Q. ^$ ^
change over to the emergency mode. This is verified if the declared Emergency ballast lumen% |# f1 H2 k; D
factor (EBLF) is achieved during emergency operation at 25 °C.$ Z; G9 Y! d( v3 W/ u
Compliance is checked by the following test:5 D4 }! C4 n; M* a- n9 v* v' t; R
a) ballast provided with batteries:8 |) L) `! v9 ~7 Z3 j7 s
The voltage supplied to the ballast by the batteries is continuously measured during
( E5 P, M6 `6 g: [8 semergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The* `* u. I/ |+ z7 y U
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
& M' Q4 j1 w' I! _failure of the normal supply and the end of rated duration of operation are retained for the
4 T9 U8 R$ {- e. S2 ?: a6 ?7 ]1 E# |EBLF measurement.0 O; n9 D$ U9 o0 q3 A' u5 f
b) ballast not provided with batteries and designed for d.c. central supply system:1 f: \, w- k* ^* i) T
The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
. M* l# L% }1 @( \2 w# eretained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
: }* Z! t& }/ h& p7 K# Urated voltage (V1) unless specifically advised of a different value by the control gear
3 A* ]% {1 i: R. H+ v. T% l: vmanufacturer.# t# ^: v7 R) i9 v0 I" q3 z ?
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause2 y+ B+ K* J) \# e- _5 j
22.16.1. V2 b" x5 g$ m0 q' g
Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and
- t+ c7 B9 S! e# z, _9 dhaving not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,+ j% v+ \0 G! i1 e9 M/ W, Q* {8 A4 ?
then in steady conditions at Vmin.( V, Z& \' @" m3 ?& l+ H, w
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall
+ i3 y! x/ t! r, y9 s8 z) Z: Wbe retained and shall reach at least the declared EBLF.9 I' n* \; k2 O; c
The value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.1 e; e1 T" D* ?; [( |% u
NOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.
: T( J; g2 g# {- ^3 D' x" FAs declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.
# w5 k8 C" r3 h: N" Y# c2 ZAny 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.
1 ?" B7 K2 G1 ~1 [0 nNOTE 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 j4 V1 Q6 Z! @& j' ~+ l6 p% A1 a: J$ h6 ?+ m9 V n6 o
F译得不错。
% |3 j- h" J- g! v1 E5 R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？ |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
楼主
显身卡
发表于 2007-8-29 15:24
发表于 2007-8-29 16:20
