THE EVALUATION OF POSSIBILITY OF NORMAL OPERATION OF CABLES BASED ON TWISTED PAIRS WITH PVC JACKET UNDER THE CONDITIONS OF HIGH HUMIDITY AND TEMPERATURE
Journal Title: Електротехніка і Електромеханіка - Year 2017, Vol 0, Issue 5
Abstract
Introduction. Development of cables for structured cabling systems based on twisted pairs for shipbuilding is carried out in two main directions: increasing the fire safety of cables and increasing the long-term permissible operating temperature by using new, more heat-resistant, electrical insulating materials. Purpose. Substantiation of the possibility of unshielded cables on the basis of unshielded twisted pairs with thermoplastic polyethylene insulation in PVC protective jacket in conditions of high humidity and high operating temperatures on the basis of the results of accelerated aging. Methodology. The cycle of aging under conditions of increased humidity is performed for 336 hours. Then the sample was under natural drying conditions for 1440 hours. Thermal aging in a thermostat at 90 °C was carried out in two stages: first – for 206 hours, the second – for 260 hours. In the initial state and after accelerated aging, measurements of the capacitance and tangent of the dielectric loss angle of all the insulating gaps at frequencies of 100 Hz, 1 and 10 kHz were performed. Results. According to the results of accelerated aging under conditions of high humidity and temperature, it is established that the design of an unshielded cable based on unshielded twisted pairs with thermoplastic polyethylene insulation in a protective coating based on PVC-plastic is resistant to external influencing factors. Practical value. The prolonged holding at temperature of 90 °C is equivalent to operation at temperature of 40 °C for 6.8 years. At higher operating temperatures, the lifetime of the cable is significantly reduced.
Authors and Affiliations
G. V. Bezprozvannych, I. A. Mirchuk
Keywords
Related Articles
- EP ID EP293522
- DOI 10.20998/2074-272X.2017.5.08
- Views 119
- Downloads 0
EXPERIMENTAL INVESTIGATIONS OF ELECTRO-THERMAL RESISTIBILITY OF CONDUCTORS AND CABLES TO ACTION OF RATIONED ON THE INTERNATIONAL STANDARD IEC 62305-1-2010 APERIODIC IMPULSE OF CURRENT OF ARTIFICIAL LIGHTNING
Purpose. Experimental researches of electro-thermal resistibility of cable-explorer products, applied in the power electric circuits of objects of electric-power industry, to action on its copper and aluminum parts beari...
AN ANTHOLOGY OF THE DISTINGUISHED ACHIEVEMENTS IN SCIENCE AND TECHNIQUE. PART 39: NOBEL PRIZE LAUREATES IN PHYSICS FOR 2011-2015
Purpose. Implementation of brief analytical review of the distinguished scientific achievements of the world scientists-physicists, awarded the Nobel Prize on physics for the period 2011-2015. Methodology. Scientific met...
A CHOICE OF SECTIONS OF ELECTRIC WIRES AND CABLES IN CIRCUITS OF DEVICES OF HIGH-VOLTAGE HIGH-CURRENT IMPULSE TECHNIQUE
Purpose. Implementation of calculation choice of sections of electric wires and cables in circuits of devices of high-voltage high-current impulse technique (HHIT), characterized flowing of pulsed current ip(t) with diff...
ON THE INFLUENCE OF THE LEVEL OF AN EXTERNAL MAGNETIC FIELD AND THE LENGTH ON THE MAGNETIC MOMENT OF CYLINDRICAL CORES
Purpose. Analysis of inhomogeneous magnetization of long cylindrical permalloy 50N cores by a uniform constant magnetic field and the influence of length and field level on their magnetic moment. Methodology. The magneto...
AN OPTIMIZATION APPROACH TO THE CHOICE OF PARAMETERS OF LINEAR PULSE INDUCTION ELECTROMECHANICAL CONVERTER
Purpose. The purpose of the paper is to select the main parameters of the linear pulse induction electromechanical converters (LPIEC) for high-speed and power use with the use of the optimization approach, which provides...