Views:198 Author:Site Editor Publish Time: 2019-11-08 Origin:Site
In this era of power and energy, every household has installed various electric fittings, such as cable wire termination. Maybe somebody doesn’t know what is cable, but it doesn’t matter, today I will tell you what is cable wire termination and its role, classification and inspection.
Cable terminal head integrates waterproof, stress control, shielding and insulation, and has good electrical and mechanical properties, moreover it can be used for a long time under various harsh environmental conditions. It has the advantages of lightweight and convenient installation. Cable terminations are widely used in power, petrochemical, metallurgical, railway ports and construction.
The cable terminal function is assembled to the first end of the cable line to complete the connection with other electrical equipment, such as an outdoor terminal, an indoor terminal, an elbow terminal, and the like.
The cable terminal head evenly distributes the electric field at the end of the cable to achieve effective control of electrical stress. Electrical stress control refers to the control of electric field distribution and electric field strength, and takes appropriate measures. Make the electric field distribution and electric field strength at the best. Make the electric field distribution as uniform as possible and improve the reliability of the cable operation.
①According to the installation materials, it is divided into a heat-shrinkable cable terminal and a cold-shrink cable terminal.
②Divided into 1KV cable head, 10KV cable head, 27.5KV cable head, 35KV cable head, 66KV cable head, 110KV cable head, 138KV cable head, 220KV cable head according to work voltage.
③According to the conditions of use, it is divided into indoor cable terminal and outdoor cable terminal.
④According to the number of cores, it is divided into single core terminal, two core terminal, three core terminal, four core terminal (also divided into four cores and 3+1), five core terminals (also divided into five cores, 3 +2 and 4+1).
The inspection cycle is checked according to the on-site operation, power outage every 1 to 3 years. The outdoor cable terminal is patrolled once a month, and power-off cleaning inspections are conducted every February and November.
The check contents are as following:
① The insulating sleeve should be complete, clean, and free of flashover discharge traces. There is no nest near it;
②The joints are in good contact and there is no heat;
③ Whether the insulating rubber is collapsed, softened and accumulated;
④ Whether the terminal head leaks oil, lead package and seal lead have no cracks;
⑤Whether the phase between the core wire and the lead wire and the ground distance meets the requirements, and whether the ground wire is in good condition;
⑥ Whether the phase color obvious. Whether it matches the phase of the power system.
I hope the readers who read my article will have a clear cognition of cable wire termination. And can know the standard inspection cycle then to have a regular maintenance to avoid failures. Jecsany Electrical Equipment is a professional supplier specialized in cable lugs, cable terminals, PG clamps and etc.. Get more details about our company and products, please visit our website: https://www.jecsany.com/