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我将有关文字复制在此：
* h! n) T4 @) H$ h3 o7 \. f20 Functional safety (EBLF)* j) x0 [/ W4 [8 g) F" Q6 p% N7 B
The appropriate lamp associated to the ballast shall provide the necessary light output after2 V4 i! S) p; p( A0 q+ j3 J2 s. [
change over to the emergency mode. This is verified if the declared Emergency ballast lumen8 s* b6 g p- K3 G8 r1 {8 F
factor (EBLF) is achieved during emergency operation at 25 °C.- v4 J& E6 @, z3 W' h# a# a2 `0 i
Compliance is checked by the following test:
+ @' r# `) r/ K- y7 A7 a* {4 [9 Xa) ballast provided with batteries:: |" N5 ~+ Z' ^8 U; Y" K4 z
The voltage supplied to the ballast by the batteries is continuously measured during
* H- c9 s$ b; ?& jemergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The7 C$ V( H; I& w" X+ r
values measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
5 X: @6 H1 b3 y$ ?4 tfailure of the normal supply and the end of rated duration of operation are retained for the! t! ~' k9 N4 r1 a" s7 K
EBLF measurement.' F$ K5 q$ F/ k
b) ballast not provided with batteries and designed for d.c. central supply system:
" M/ t$ y! T G4 u/ v3 }The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are0 j3 k, h* {7 n$ \
retained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
5 }$ _( Z& C& n9 Yrated voltage (V1) unless specifically advised of a different value by the control gear
* h" v$ P# |4 R9 I9 omanufacturer.5 w7 A; u" \; T+ |" F
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause. w% h/ X) ~9 l6 N* ]4 B/ o
22.16.1
% l) |5 R; h% L& V+ n4 g5 z: eMeasurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and
! g( I9 s4 S _$ Phaving not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage, s/ C: ?8 b+ l5 }! j7 t! V1 \
then in steady conditions at Vmin.. `+ P9 X) c& y( I1 u* {
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall# m6 J3 Q2 d5 [9 B; Q' ~
be retained and shall reach at least the declared EBLF.5 f' U! b7 i. k& O; ]9 S1 j
The value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.3 ~+ C; U( i7 [* s* C! `& N5 P
NOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.
$ x. K: v- ~% q2 Q# }As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.: F; A/ J: P* J* p0 ^! q% ~/ S2 l
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.
3 X, ~, K( M! X0 ~* |+ s/ e$ gNOTE 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.
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a% ~* U' B5 R o- ^0 bF译得不错。$ Z) j6 M) g1 q3 _/ L5 x
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
