|
|
我将有关文字复制在此：
2 Y! F+ O2 ]) O, B20 Functional safety (EBLF)
0 r1 v }" V* d! V8 H2 uThe appropriate lamp associated to the ballast shall provide the necessary light output after
) O3 ^6 K# Y+ N# m8 N# q: p/ \change over to the emergency mode. This is verified if the declared Emergency ballast lumen8 R9 ?8 u% ~+ O- `0 C
factor (EBLF) is achieved during emergency operation at 25 °C.
% [1 | W! f) O& W: }( kCompliance is checked by the following test:1 Y* L7 E1 Q+ J1 o7 V% ?
a) ballast provided with batteries:
, Y! ^6 H, s$ r2 WThe voltage supplied to the ballast by the batteries is continuously measured during
3 c6 W( r; V+ g# O$ ]emergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The& w- I1 f1 G' t, a Q
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
3 q5 q8 u4 a/ o9 r9 s4 pfailure of the normal supply and the end of rated duration of operation are retained for the
& X- B% O [. x! e1 N+ {EBLF measurement.: ^$ A3 a3 J& j3 c/ j8 H
b) ballast not provided with batteries and designed for d.c. central supply system:
3 `3 ^0 m0 `7 S6 m$ { DThe rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are) Z1 e J) Q; a+ r* t
retained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
8 ^& L& `. e- l$ u/ H H& R4 Irated voltage (V1) unless specifically advised of a different value by the control gear- u: C! [- y# w8 b- L
manufacturer.
% w/ L9 A0 E7 c0 H5 INOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause
3 s, o ^# S O& q# }22.16.1
; S+ `' T+ |' e* O* o2 m$ v) t* XMeasurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and
/ l2 P9 _3 Y9 }' y* A' Ehaving not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,
; O r3 S/ n4 ^$ I Bthen in steady conditions at Vmin.( J& @* @4 p9 W: I* A
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall7 q6 Z7 m1 M: U% k- n
be retained and shall reach at least the declared EBLF.4 X7 u! z0 V! t0 f$ J; R
The value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.
- X0 T2 _. @* ~+ b( W t7 I( wNOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.' d9 I) {6 {3 p) Y, j, L* ?+ [4 _
As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.
1 o! B+ n" {9 K3 Z* h# }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.5 _! e0 v0 }2 w) |% N# l8 U) M
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.( a% X4 A! _# E4 ]5 I* T/ ~, Q
# X/ u, u' }; b% tF译得不错。) \ E6 ?. A4 o8 n3 D* X" C
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？ |
|
|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