Final report: COOMET 344/UA/05 supplementary comparison of 50/60 Hz power (COOMET.EM-S2)

Abstract

This report describes the results of supplementary comparison COOMET.EM-S2 (also known as regional comparison COOMET 344/UA/05) of AC power measurements at low frequency (50/53 Hz). Three participants were involved in the measurements carried out from 2008 to 2011, with the aim of supporting their Calibration and Measurement Capabilities (CMCs).The results of this comparison are described in the report. They show that the differences between almost all laboratory's values and the reference values are within the expanded measurement uncertainties at a coverage factor k = 2. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Traceability Features of the Electric Power Unit in Ukraine

“…In 2008 to support the published CMCs, UMTS organized SC of power COOMET.EM-S2 [14] and were proposed to be the pilot laboratory. It was decided to perform the comparison at 120 V, 5 A, 50 Hz and 53 Hz, power factors 1, 0.5 Lead/Lag in order to be in line with EURAMET.EM-K5.1 KC of power.…”

Linking results of key and supplementary comparisons of regional metrology organization for electrical power

“…The measure process of measuring electrical active power is fully automatically with the help of connector output count number of pulses which is directly proportional to the measured active power. The output frequency of RM 15-04 is 50 000 pulse/s [5].…”

“…The degree of equivalence D i of national standards and its expanded uncertainty U (D i ) that participated in EURAMET.EM-K5.1 [6] and COOMET.EM-S2 [5] comparisons are shown in Table 3, Figures 1 and 2 for 53 Hz.…”

“…The proposed procedure linking of results of COOMET.EM-S2 comparison [5] to EURAMET.EM-K5.1 comparison [6] for electrical power was realized with using results of linking NMIs (SE "Ukrmetrteststandard", Ukraine and BIM, Bulgaria).…”