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我将有关文字复制在此:5 r1 W- k$ g" Z6 {- T+ w6 `. G% G
20 Functional safety (EBLF)
0 q* B1 G8 H0 C# q {- s! fThe appropriate lamp associated to the ballast shall provide the necessary light output after
. {+ ^' w: C4 schange over to the emergency mode. This is verified if the declared Emergency ballast lumen, F- T& Q0 I* Z2 j6 Z; E8 F
factor (EBLF) is achieved during emergency operation at 25 °C.& M1 e2 q: Y# Y
Compliance is checked by the following test:5 w) `& g5 M; C: m7 K
a) ballast provided with batteries:! j, K, W5 ?& C4 b$ o! @' e
The voltage supplied to the ballast by the batteries is continuously measured during: L' e# h$ i- L- r, g
emergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The
) j' Q! z, ~8 ]0 x# ^1 m4 L/ cvalues measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
: ?) a1 R2 S6 [: s/ K" n' Z9 \# _failure of the normal supply and the end of rated duration of operation are retained for the5 N* s# n" j" j2 W+ m5 S( f
EBLF measurement.
$ Z0 u. y. B& Z. ab) ballast not provided with batteries and designed for d.c. central supply system:
7 Z$ U& f" e* @" G% _2 X( kThe rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
8 f9 Z0 Z0 t; o: g( @+ |retained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
# F% @3 q: M- D2 m; b) N, Arated voltage (V1) unless specifically advised of a different value by the control gear
0 E4 M P$ v! Y. Y6 m% V8 zmanufacturer.
' @. G! q% j) ?4 s+ c/ ENOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause
1 |3 Z. H! D* U" k3 e, t22.16.1) S9 ^! |+ _4 r; @( Y, H) [: @
Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and. s8 d4 {$ I. ^* h- \# f
having not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,
& G5 b3 B( ~9 Qthen in steady conditions at Vmin.; K8 A- Y! r, Q% }& O2 p
The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall
0 Y: b* x7 c( h; J- C8 Dbe retained and shall reach at least the declared EBLF.
. K X7 @1 S. x9 O- P- s) E, DThe value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.
! L2 M3 t t2 |8 }6 M. aNOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.
0 ~& ]2 d; J7 bAs declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.- d, u. y6 L6 A9 J
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: L) b- `
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.
! V9 a9 g5 t( K8 S" f# V1 h' b( z) H k0 D" M7 z6 p3 \) w( Q
F译得不错。
6 w X, H- E: n% {/ }# 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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