power supply manufacturer has actively participated in the Underwriters Laboratories® Inc. (UL) ‘Clients Test Data Program’ (CTDP) and the IECEE CB Scheme SMT (Supervised Manufacturer’s Test) Program, which is now also under the supervision of UL, for over 16 years. Being on these programs allows TDK-Lambda to use its own testing facilities to generate UL and CB safety reports and test data, this capability helps to reduce time and the accompanying costs for the safety approvals of its own AC-DC power supplies and DC-DC converters.
“As a leading, global power supply manufacturer, it is imperative for us to be at the forefront of safety standards testing,” says Bob Taylor, Safety Engineering Manager at TDK-Lambda UK. “Being approved to the Third Edition of 60601-1 for Medical Devices helps ensure that our latest medical power supplies are tested and approved to the highest safety standards.”
To get onto these programs, Taylor explains: “UL engineers assess all elements pertaining to safety testing from our laboratory quality program to physical resources, as well as test and measurement equipment. Our testing personnel and procedures to conduct specified tests must also be qualified by UL, who reassess our test lab and personnel on an annual basis.”
“In order to ensure continuity, regular spot-checks are performed by a UL engineer,” continues Taylor. “Confidence in the accuracy of the data is gained by correctly documenting the test methods used and results obtained so that they can be replicated, if required, in the future.”