ul697 温升测试defined load

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IEC60335试验指甲

31.6 The defined load referred to in 31.2 is:
" |2 Y* E% y& ~% U: na) The output power load as determined from Figure 31.1 following measurement of the output
5 A/ m; o* F( C  H- U, V- wpower obtained when load voltage is 85 percent of the open circuit voltage;
b) The marked rating of the transformer if greater than the output determined as in (a); or
( j+ _, [* J$ Gc) The marked rating of the transformer if less than the output determined as in (a) and the
/ P# b  t2 M/ d6 {7 m  N# Utransformer is provided with a protective device that operates when the transformer output
power is 110 percent of the marked values

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.
有做过的高手请解惑.谢谢!