Hello from San Diego:
IEC 742 (aka EN 60742) applies to transformers in general and stand-alone transformers in particular. IEC 742 contains some additional requirements for stand-alone transformers compared to those in IEC 950 (aka EN 60950). Unfortunately, IEC 1010 (aka EN 61010) does not contain specific transformer requirements, so IEC 742 can be invoked if the test house so chooses. If your transformer is built-in, then I believe a transformer complying with IEC 950 also complies with IEC 742. It may be that the test house is simply saying that an IEC 950 certified transformer, by definition (not by test), does not comply with IEC 742. In other words, they cannot accept, carte blanche, the IEC 950 certification as being applicable to IEC 1010, whereas they could accept IEC 742 certification. This may mean that the test house will need to conduct tests to demonstrate compliance with IEC 1010. Best regards, Rich ------------------------------------------------------------- Richard Nute Quality Department Hewlett-Packard Company Product Regulations Group San Diego Division (SDD) Tel : 619 655 3329 16399 West Bernardo Drive FAX : 619 655 4979 San Diego, California 92127 e-mail: [email protected] -------------------------------------------------------------
