Capacity calculation for a multiconductor cable with a composite insulation
The authors introduce a universal method for calculating cable parameters – partial and mutual capacitance of a multiconductor cable with a multilayer insulation made of various materials. The method may be used to calculate the sensitivity of cable parameters to the deviations of conductor size and dielectric conductivity of cable insulation layers. The range of application of this method may be extended to include the calculation of insulation conductivity, inductance and cable thermal resistance.
The influence of external factors on the main features of strength members of optical cable construction
The paper presents the results of the investigation into the influence of external factors, such as humidity and temperature exposures, on the basic parameters of aramid yarn and glass-reinforced plastic elements from the point of view of their ability to perform protection functions. The results of optical fiber and cable tests for resistance to aggressive media exposure are also given. The results obtained may be used for optical cable reliability analysis.
S.D. Kholodny, Dr Tech. Sc., Prof., Chief Research Worker D.A. Kharchenko, Engineer Contact:firstname.lastname@example.org
Calculation of cable tension force in the vulcanization chamber of a catenary continuous vulcanization line
Procedure for the calculation of cable tension force in the vulcanization chamber of a catenary continuous vulcanization line is introduced. This method allows estimating the possibility of contact between the cable surface and the vulcanization chamber wall in case of tension force deviation from the optimal value. The calculation of optimal tension force value for КГ 1×150 type cable is presented as an example.
Electric strength of a symmetrical cable with a skin-foam-skin insulation for a digital subscriber access
The paper presents the results of experimental investigations into the electric strength of a symmetrical cable with a skin-foam-skin insulation for a digital subscriber access. Statistical methods are used to calculate the insulation strength on manufactured cable lengths. It is shown that by automatic regulation of linear capacitance, diameter and eccentricity in the course of insulation extrusion a sufficiently high dielectric strength value can be achieved.
Selection of permissible electric stress and calculation of electrical parameters for a cable joint testing by dc high voltage
The procedure of electrical parameters calculation for high voltage cable joints is described on the example of a straight-through joint. Admissible electric stress values for the joint insulation are selected. A 110-kV joint construction is presented.
Cable accessories, voltage of 110 kV, electric field control, transition joint, admissible electric field values, Weibull distribution, VNIIKP, PE-insulated cable.