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我将有关文字复制在此:1 B% [+ v/ U: A& j
20 Functional safety (EBLF)9 M) ?# i2 C3 i) F. n
The appropriate lamp associated to the ballast shall provide the necessary light output after; B! O3 e( Y/ K( K N- M. `8 w9 _
change over to the emergency mode. This is verified if the declared Emergency ballast lumen
& Z) e; Z9 g) ^1 ~% Efactor (EBLF) is achieved during emergency operation at 25 °C.7 e. m7 n' v8 p, ]+ |. X
Compliance is checked by the following test:
! I8 k( h' d1 ma) ballast provided with batteries:
3 H; E, A/ a3 y: E4 o& ^The voltage supplied to the ballast by the batteries is continuously measured during
- Z3 d2 U& \; i/ e$ g4 Kemergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The
3 ?& b& Z& U1 i( G8 l \" Kvalues measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
3 G) i2 H! Q" t/ G2 P& j: M6 cfailure of the normal supply and the end of rated duration of operation are retained for the7 x* |: Y: t' `# J; q0 u/ [: S4 n
EBLF measurement.: W3 h2 t( Z0 I& G# r* J5 t
b) ballast not provided with batteries and designed for d.c. central supply system:
: [6 X) p9 |% r8 e, [The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are- t5 z" S+ Y' G' O7 T' [
retained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the4 G8 D/ ~! F! W% H
rated voltage (V1) unless specifically advised of a different value by the control gear6 q* F; C! |! q* O
manufacturer.7 @9 b8 t) n {4 t% N6 Y
NOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause
; s6 N5 k, V1 Z1 Y3 C22.16.1* ]' J3 |' B: L- @: H/ d) e; A1 P
Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and
( W( i q. q% Ihaving not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,! g% _1 u0 ^ }0 I; [
then in steady conditions at Vmin.* Y2 ~ @% z" ?* ~( {1 W
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall) D5 I& N' r% ?! c% z
be retained and shall reach at least the declared EBLF.
3 t, o0 p$ o3 PThe value measured at 5 s and V1 shall reach at least 50 % of declared EBLF./ a( Z! Y: h, [/ G. k
NOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.
1 e. t9 f* D+ k, ?As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.: v6 y3 j ^- N5 x! {! `- {
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.) Z1 W$ C) X" Y3 Q& Q/ f
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. m# H1 ]# f1 U
4 I. e& P6 u% k& a5 I! F
F译得不错。
$ n+ E+ C6 e) `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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