IS 4540-1968
百检网 2021-07-17
标准号:IS 4540-1968
发布日期:1969/5/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard applies to monocrystalline rectifier assemblies and equipment for supplying dc power from ac sources at frequencies up to 2 000 c/s and for dc power for voltages not exceeding 5 000 V.1.1.1 In so far as it is applicable this standard relates also to controlled semiconductor devices having trigger characteristics. More detailed treatment of controlled semiconductor devices (that is, thyristors ) would be dealt with in a separate standard.1.2 It does not apply to telecommunication rectifiers other than those for power supplied to such apparatus, nor to rectifiers used as auxiliaries to measuring instruments. Further, it does not apply to rectifiers based on polycrystalline semiconductor materials.
百检能给您带来哪些改变?
1、检测行业全覆盖,满足不同的检测;
2、实验室全覆盖,就近分配本地化检测;
3、工程师一对一服务,让检测更精准;
4、免费初检,初检不收取检测费用;
5、自助下单 快递免费上门取样;
6、周期短,费用低,服务周到;
7、拥有CMA、CNAS、CAL等权威资质;
8、检测报告权威有效、中国通用;