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The paper describes a comparison conducted at the National Measurement Institute Australia (NMIA) between the thermal power comparator that sets the Australian standard of power and the digital power comparator developed at the D. I Mendeleyev Institute for Metrology, Russia. The difference between the two systems did not exceed 5 μW/VA at 53 Hz, 240 V currents of 2.5 A and 4.5 A, and power factors...
Primary microwave power standards are presented with descriptions of the basic details of standards and procedures for traceability of power measurements in the Russian Federation.
The paper describes a new primary standard of power at mains and audio frequencies developed at the National Measurement Institute Australia. The standard is based on precision transformers and a thermal power comparator. It provides fully automated power measurements with 1-s uncertainties close to 2 µW/VA.
A system for the calibration of wideband wattmeters used in the measurement of standby electrical power in accordance with IEC 62301 has been developed at the National Measurement Institute, Australia (NMIA). The system has been tested with current waveforms having crest factors up to 20 and has uncertainties significantly lower than those required by the standard.
This paper describes the bilateral comparison carried out by two National Metrology Institutes, NMC from Singapore and INRIM from Italy. The subject of the comparison concerns the calibration of a new type of coaxial power sensors fitted with type N (up to 18GHz) and 3.5mm (up to 26.5GHz) connector. This is the first international comparison of this kind in which the transfer standards are based on...
The paper summarizes current efforts to develop a novel alternating (AC) sampling standard at the PTB in cooperation with ZERA- and EMH-GmbH in Germany. This instrument shall operate in the frequency range of 40 Hz to 5 kHz and serve as a transfer standard, allowing measurements with basic accuracies of some muV/V at 50 Hz to be made. It is intended to ensure improved traceability to the PTB primary...
The following topics were dealt with: power generation; equipment design; power system architecture; remote power feeding; decentralized power; grounding equipments; bonding equipments; VRLA; power storage; fuel cells; DC-DC converter control; inverter topology; UPS; photovoltaic energy; wind energy; power management; and power standards
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