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我将有关文字复制在此：: p/ p( m; d6 H8 U4 T h2 m0 v
20 Functional safety (EBLF)
( T2 W4 G* P2 S6 Y( \' H4 DThe appropriate lamp associated to the ballast shall provide the necessary light output after
6 o6 x2 X V+ R Y4 J6 Cchange over to the emergency mode. This is verified if the declared Emergency ballast lumen
9 ?( h; ~* s N5 G2 Xfactor (EBLF) is achieved during emergency operation at 25 °C.) a: o4 `: ~( d7 W7 D- w
Compliance is checked by the following test:
! t5 ^, Q( H ]3 m" A# I% d! fa) ballast provided with batteries:8 j6 t4 l# D0 [" ^4 J1 Y _
The voltage supplied to the ballast by the batteries is continuously measured during
+ l" J& G( ]+ k8 Jemergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The; Q% Q$ C$ x6 @5 x2 Y6 v# K a
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after, z3 K5 v. w2 d
failure of the normal supply and the end of rated duration of operation are retained for the* l9 y$ U4 X% C7 [2 U" E
EBLF measurement.
4 M1 n( v( E. L/ _9 K0 `7 I! cb) ballast not provided with batteries and designed for d.c. central supply system:( V3 v/ N. G$ O# D
The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
G, Y# S8 R" Y3 D" }7 mretained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the# Z. ^- M( _+ T+ L' s& {. u
rated voltage (V1) unless specifically advised of a different value by the control gear
7 c9 J4 q2 y1 ]5 J: rmanufacturer.) |" o6 _. n" Q9 P2 z
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause5 ^# p; t& k- i y8 N# H
22.16.10 [" [& @9 `& C6 d5 s8 x/ t
Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and% X& ?; o% l, t2 K Y& ?- ?
having not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,
* T3 l e7 a' r, L2 x- Qthen in steady conditions at Vmin./ v; S+ B& d( Z7 s$ v
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall9 l7 D {' p$ X0 s' J3 A
be retained and shall reach at least the declared EBLF.4 j0 z' l# E2 @* k8 w) h# o
The value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.- @: X5 i2 T& g, V0 r( M+ @: R
NOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.; P% G9 e5 T- ~) t5 q1 ~$ F
As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.
$ Z, _4 v" m# v& K ]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.& | m) E, ~" g) `6 N1 K8 p1 L" |
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.
, ?: o) q" L8 M4 {7 s* A( i# U5 Z0 O$ ` M7 i. i: ^2 D! |" m
F译得不错。0 w8 _4 q9 V, @: B9 K
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