|
|
我将有关文字复制在此：
8 o/ y! ^ |6 s6 n5 t20 Functional safety (EBLF)
2 x& f$ N7 ]/ h' M/ c3 TThe appropriate lamp associated to the ballast shall provide the necessary light output after$ x- _- @ h! M7 {) Q3 C
change over to the emergency mode. This is verified if the declared Emergency ballast lumen
( T/ p+ z7 N$ d: s* [2 i9 W8 i: vfactor (EBLF) is achieved during emergency operation at 25 °C.
( ~ M3 `, \6 TCompliance is checked by the following test:7 V) t8 E; o7 T4 f2 S
a) ballast provided with batteries:
( R% `. }5 C Q6 r) M, q+ ZThe voltage supplied to the ballast by the batteries is continuously measured during
! b3 |0 ^$ e! s2 w Pemergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The& a0 B3 P! F5 ?" n" ~8 b6 W
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after C ~) k. |: m$ r! `
failure of the normal supply and the end of rated duration of operation are retained for the. Y) L9 t) o) L3 `. j. O
EBLF measurement.2 B, L6 h' a- S1 M
b) ballast not provided with batteries and designed for d.c. central supply system:) m/ ?5 i, P \
The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
! M, g+ c r& {4 I( z8 J4 Sretained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
( u& D0 O0 K9 |: Q5 M( X, `rated voltage (V1) unless specifically advised of a different value by the control gear4 m" x! G: l3 {5 L5 h: d8 q; u% Q, t
manufacturer.8 {1 @0 T g4 Z. P1 n
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause
7 @' T+ Z' g% W/ O* C22.16.1% ?" f1 `; Q" y3 s7 h
Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and2 X: O) v9 N; c# G- ~9 B/ F X) M
having not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,
2 H6 o6 O B" k Rthen in steady conditions at Vmin.! h' R5 x" @: R' j7 r. i
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall
3 r+ {8 O+ m" c9 {" kbe retained and shall reach at least the declared EBLF.
) \9 [ k! ~- }+ e5 D# E, r% IThe value measured at 5 s and V1 shall reach at least 50 % of declared EBLF./ q: d+ Z Q4 M9 {$ w; ~
NOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.7 S/ L6 P( @6 c( X& i
As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.
3 {* S+ Y' o4 @+ ^, {/ {7 R9 _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.
; g/ @- Q2 ]! Y$ u* S) n3 o1 UNOTE 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.0 ]8 d, f; A* q
' H2 j i8 A. n% h- U
F译得不错。
3 F7 q: C5 m4 [2 p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
