Type Test Procedure for Electronic Ground Power Units

The first step to develop a product with integrated power electronics consists in analysing the requirement specifications from customers. In the next developing step is necessary to carry out some series of measurements and tests on a functional prototype. The goal of the type test is to confirm that the proposed product specifications combined with the customer wishes are achieved. The present paper refers to international standards, which are dedicated to power electronics products, as for instance IEC 146-1 part 1-3, general requirements; IEC 146-2, 3 semiconductor converters, IEC 478 part 1-4, stabilized power device and other regulations. On the base of practical measurement examples and case studies in the proposed contribution are described along with the procedure used to test the 18 kW ground power devices. The measurements have been carried out with calibrated instruments like: multimeter, oscilloscope, radio interference analyzer, noise level meter, temperature-meter, milliohm- and airflow meter, ESD instrument and burst generator assuring their reproducibility. In order to demonstrate the keeping of the initial quality level, the type tests mentioned in the paper, like technical testing, static and dynamic measurements, special loads, conducted emissions measurement, sound level measurement, heat run test and additional measurements will be repeated after some time intervals or after a certain number of delivered units. By testing the prototypes all technical and sales documents should be considered, and if required, the national and international specifications