-
Article
Gold in Natural and Synthetic Pyrite: a Case of the Darasun Gold District, Eastern Transbaikal Region, Russia
Gold concentration in natural pyrite from the high-grade sulfide ores of the Darasun gold district and pyrite synthesized from the solution saturated in gold has been studied using laser ablation inductively c...
-
Article
Assessment of the Applicability of an Iron-Containing Composite for the Purification of Transformer Oils
The possibility of using a composite material (hereinafter referred to as composite) based on silica gel modified with particles of Fe(III) compounds for the highly efficient purification of contaminated trans...
-
Article
Changes in the Physicochemical Characteristics of Cellulose upon Its γ-Irradiation and the Subsequent Mercerization
Changes in the molecular-weight distributions of low-molecular-weight and alkali cellulose after the processes of γ-irradiation and mercerization of cellulose have been studied. The features of the dissolution...
-
Article
Effect of γ-Irradiation of Cellulose on the Molecular-Weight Characteristics of Nitro Esters Produced from It
The effect of γ-irradiation of cotton cellulose on the molecular-weight distribution (MWD) of the nitro esters prepared from the irradiated cellulose has been studied. It has been established that the degradat...
-
Article
Reducing the Risk of Damage to Power Transformers of 110 kV and Above Accompanying Internal Short Circuits
Methods of increasing the operating reliability of power transformers, autotransformers and shunting reactors in order to reduce the risk of damage, which accompany internal short circuits and equipment fires ...
-
Article
The development of coil short circuits when transformer windings become contaminated with metal-containing colloidal particles
The radiational-thermal development of coil short circuits due to the action of partial discharges of the first kind when the windings of transformers, autotransformers and shunting reactors become contaminate...
-
Article
Interrelation of surface tension, optical turbidity, and color of operational transformer oils
Measurements of the acidity, optical turbidity, surface tension, and color of transformer oil from 54 power transformers, autotransformers, and shunt reactors are reported. Changes in surface tension, optical ...
-
Article
Contamination of the transformer oil of power transformers and shunting reactors by metal-containing colloidal particles
The results of a measurement of the contamination of the oil in 66 transformers by metal-containing colloidal particles, formed as a result of the interaction of the oil with the structural materials (the copp...
-
Article
An estimate of the limit state of power transformers and autotransformers
The main indicators of the limit technical state of transformers and autotransformers, for which their further use is impermissible or inadvisable, are considered. The main elements of a power transformer whic...
-
Article
Radiation-chemical degradation of the paper insulation of power transformers
-
Article
Regeneration of Cellulose Insulation of Windings of Long-Life Power Transformers
Main aspects of the physicochemical condition of cellulose insulation of windings of power transformers with a long-term service life are analyzed with the aim of determining criteria on the possibility of pro...
-
Article
Rated Indices for Evaluating the Winding Insulation Wear of Power Transformers
-
Article
Effect of γ-radiation in the quality of high-molecular sulfite cellulose
The effect of ionizing radiation on the molecular weight characteristics and ability to be dissolved of high-molecular, high-viscosity sulfite cellulose has been investigated.
