hwoc 发表于 2019-11-7 09:57

请教UL508关于机电继电器测试问题

继电器认证UL508,测试电子镇流器和标准镇流器负载,测试条件时怎样的?

cbb98 发表于 2020-2-12 11:26

Since January 26, 2017, UL 60947 replaced the old requirements in UL 508 for several types of industrial control equipment.
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