标题: UL588 cls 49这个测试怎么做？什么意思呀？ [打印本页] 作者: EVERGREEN21 时间: 2010-8-6 13:51 标题: UL588 cls 49这个测试怎么做？什么意思呀？ 49 Component Power Measurement Test 5 ^5 C, e+ a' E0 C% [0 H/ x49.1 To determine if a component or a circuit of a seasonal lighting product is capable of delivering 15- K. u( x' Q' g( D2 z
watts of power for one minute (see 48.1, Exception No. 1(c)), the component shall be tested as described # \9 C9 b; }- I: `! L3 n0 Iin 49.2 – 49.4. / H2 x1 n! l2 I$ H8 T; h49.2 The unit is to be connected to a 60 Hz, 120 V supply source. One component or circuit of the unit% L5 m7 w- G; ~9 o* k
is to be connected to a wattmeter and an adjustable external load resistor as illustrated in Figure 49.1.4 t1 _- _. j8 V. H5 e
The external load resistor is to be set for its maximum resistance. A closed shorting switch is to be1 c a8 j) G4 [5 R! I7 W( M
connected across the unit’s protective device, such as a fuse, and the resistor is then to be adjusted to 5 e; ?" a9 L9 g, H6 }* Scause a power dissipation of exactly 15 watts as indicated by the meter. The shorting switch across the! w+ E; Q: u2 w+ u
protective device is then to be opened and the time required for the protective device to open is to be % c- `& q, t, [6 Y/ y9 J% w) Crecorded.% d9 h- a/ a5 C6 d$ F3 Y
49.3 During the test, the supply circuit is to be protected by a 20 A time delay fuse, with characteristics ( v- t2 k C2 U8 asuch that the fuse will not open in less than 12 seconds when carrying 40 A.( h7 X! N2 Z5 C- v# @% f {* U
49.4 The point of measurement of the circuit (see Figure 49.1) is not considered capable of delivering 150 u& @. ^4 r9 O5 j8 ]
watts for one minute if: $ ?9 E" t$ ]" Ua) The protective device of the unit opens in less than 60 seconds,5 K0 r' v B: l5 ]4 `) V) a0 l' Z
b) A circuit component opens in less than one minute, or& G7 L/ J8 r @$ K
c) The current is inherently limited by the circuit.作者: EVERGREEN21 时间: 2011-5-11 23:56
这个图49.1是不是画错了，是测被测电路带负载能力，怎么负载接在被测电路输入端和被测电路并联，而不是接在被测电路输出端？作者: EVERGREEN21 时间: 2011-5-11 23:58
没人知道吗?作者: EVERGREEN21 时间: 2011-5-12 00:51
附上UL588 49.1图作者: EVERGREEN21 时间: 2011-10-11 12:40
Who knows?