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标题: ul697 温升测试defined load [打印本页]

作者: sam_qi    时间: 2013-3-27 09:43
标题: ul697 温升测试defined load
31.6 The defined load referred to in 31.2 is:( g2 y* A1 i0 X3 L( m
a) The output power load as determined from Figure 31.1 following measurement of the output
  h" I( `4 @1 B0 Zpower obtained when load voltage is 85 percent of the open circuit voltage;( e* V/ }& C" L3 j1 b) i2 l
b) The marked rating of the transformer if greater than the output determined as in (a); or5 E0 N: p6 {  n7 d
c) The marked rating of the transformer if less than the output determined as in (a) and the- a2 K: G& [0 {9 m
transformer is provided with a protective device that operates when the transformer output
$ u. S% |) Q% v( A. mpower is 110 percent of the marked values
& Y2 m, B, |; E4 i( n# e+ }2 ?% s' _; j% {1 ^
上述为玩具变压器的UL697温升测试,特定负载的要求.如何理解.如何计算出所带负载.7 w, W( x# r: R$ z# u1 [
有做过的高手请解惑.谢谢!2 \8 ?8 V* v1 C6 o* n0 m





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