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我将有关文字复制在此:
* ?/ F5 U) q' A4 t" r20 Functional safety (EBLF)1 t# H( V4 e0 q7 k
The appropriate lamp associated to the ballast shall provide the necessary light output after
3 Z+ Q) q P/ g0 J5 Nchange over to the emergency mode. This is verified if the declared Emergency ballast lumen
1 w0 a1 r- X( h3 ~2 hfactor (EBLF) is achieved during emergency operation at 25 °C.
! S+ ^/ ~6 L$ xCompliance is checked by the following test:$ n3 k& Q+ `+ v4 w; t5 Y3 F
a) ballast provided with batteries:
. k7 j) k/ P4 ?3 \The voltage supplied to the ballast by the batteries is continuously measured during8 i& O }4 h2 a1 F5 ?: O* E
emergency operation after a 24 h charge at 0,9 times the minimum a.c. operating voltage. The
2 d3 r, D$ B8 v i/ Rvalues measured at 60 s (V1) and the lowest voltage (Vmin) measured between 60 s after
3 Q' b. x) j" c7 ~5 Ufailure of the normal supply and the end of rated duration of operation are retained for the5 c3 C, O) w: e+ r9 F4 [
EBLF measurement.$ a9 v6 J+ A5 W& J7 U0 r$ S
b) ballast not provided with batteries and designed for d.c. central supply system:2 q6 ?9 r R" L
The rated (V1) and the minimum (Vmin) voltages as declared by the ballast manufacturer are
7 {8 i ?; ]( C/ e9 x# g% {retained for the EBLF measurement. In this case the Vmin value is taken to be 0,85 times the
6 u; s- j8 X% @# drated voltage (V1) unless specifically advised of a different value by the control gear6 C ^9 b9 [' d. p9 q* [
manufacturer.
2 q2 O" W8 X+ {" R. a" QNOTE The value of 0,85 times rated voltage is selected to provide consistency with IEC 60598-2-22:1997, Clause
8 c$ Z0 W$ R. h! \. ^22.16.1. I7 C, [$ e# q, v
Measurement of EBLF shall be made at 25 °C, using a lamp of the appropriate type and
8 L: _: H4 q+ T4 s* V6 P& |having not been lit for 24 , first at V1 after 5 s and 60 s of the application of the d.c. voltage,
6 n+ |2 J) S! Ethen in steady conditions at Vmin.
0 B4 b! I; T$ a; N- _The lowest value of the values measured at 60 s and V1 or in steady conditions at Vmin shall& E! @9 t% y, f7 W/ Z4 l
be retained and shall reach at least the declared EBLF.) V: [- F4 R( b' i+ s
The value measured at 5 s and V1 shall reach at least 50 % of declared EBLF.
! F4 e. b' a k$ q: x) g+ HNOTE Replace 60 s by 0,5 s for ballasts declared for use in luminaires for high-risk task area lighting.& Y: T3 v8 S6 ~; K9 C5 h& e
As declared EBLF must be reached after 0,5 s, measurements at 5 s are not considered.
, D' Q% A8 q- v4 r3 wAny 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.
( A+ t) r- c2 v2 Y! U1 v1 c4 CNOTE 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.
' `! ^- C$ F( d4 d E6 P9 i z2 x! R0 z7 P8 J' _
F译得不错。2 G: ] z9 i% S4 E5 W5 U
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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