This paper considers electrical power as a product which should cover certain quality norms. The voltage characteristics limits according to the standard EN 50160 are accepted as quality norms. The article discusses the approaches to the monitoring and inspection of the electrical power quality. On that aim, two configurations for remote control of the power quality analysers by a computer were tested. The practical realisation could be applied in any case when Internet access or Mobile Network coverage are available.

The steady‐state spectra photoluminescence (at 77 K) and photoconductivity (at 300 K) of both initial and densified samples of vitreous As2Se3 are studied. The densification is followed by an increased radiation band intensity, band narrowing, and some decrease of fatigue photoluminescence decay time, while the steady‐state photoconductivity decreases and its spectrum shows a non‐parallel shift to the lower energy region. The discussion of the results is based on a model of radiation center formation due to broken and/or distorted bonds. It is suggested that electronic non‐equilibrium processes in glassy semiconductors are controlled to a great extent by broken and/or distorted bonds.

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