To maintain the continuity of the cable line, it is necessary to use appropriate equipment and technology. In today's article, we will look at important issues of endings and connecting cables in cable lines. First of all, the recommendations regarding the endings are important here depending on the rated voltage of the cables and the key aspects of cable connection using cable muff.
End of cables in cable lines
Cable ends in cable lines are a key element that provides not only effective insulation, but also the durability and safety of electrical installations. In the case of cables with rated voltage up to 1 kV, special attention must be devoted to moisture protection. The penetration of moisture into the interior of the cables can negatively affect their operation and effectiveness. However, for cables with a rated voltage exceeding 1 kV, the endings should be made with cable heads, and matrices for cable tips are also necessary. In interior situations, where the voltage does not exceed 6 kV, it is allowed to not use cable heads, provided that the working veins and the interior of the cable before moisture penetration are secured. In this way, the appropriate ends of the cables become a key means that ensures not only functionality, but also the longevity of the entire cable system.
Connecting cables in cable lines
Connecting cables in cable lines is an important stage of the installation process that requires a precise approach and the use of appropriate cable muffs. The choice of muff and heads is crucial because they must be accurately adapted to the cable type, its rated voltage, cross -section and the number of veins. It is worth noting that the conditions of the environment at the place of installation should also be taken into account, and the muffs and heads must be adapted to short -circuit conditions and long -term loads.
Particular attention should be paid to the muffs used for metal coating cables and rated voltage exceeding 1 kV. In such cases, when connecting coatings, it is necessary to use metal inserts, guaranteeing continuity and tightness of connections. They protect against damage, as at previous stagesslip gel for pulling cables.
The place of installation of a muff is also important. It is unacceptable to install a muff in endangered rooms, and it is recommended to avoid their use in rooms, tunnels, channels and cable windows. In situations requiring the arrangement of single -core cable beams, it is recommended to move the muff on individual cables along their length.
MUF and head properties should meet certain standards, and MUF metal inserts should be tightly soldered to metal coatings of cables. It is also important to insulate cable vein connections in muffs.
When connections of working veins, return veins, metal coatings and cable armor, electrical properties should be taken into account, and the short circuit capacity of the connections should be in line with PN-90/E-06401 standards. Metal coatings, return veins and armor should be connected to each other with each other, metal muff hulls, heads and grounding. It is important to take into account the reduction of currents induced in the connections of metal coatings and veins of return cables. As a result, adequate cable connection not only ensures the stability and durability of the system, but also the fulfillment of electrical safety standards.
Antiple protection when creating joints and endings
At the first stages of construction of the cable line, it is necessary to use equipment such as a two -axle cable trailer. Anti -impairment protection is necessary at further stages. The grounding of metal bodies and bases of heads in cable lines plays a key role in preventing potential threats. It is important that the grounding is made in a visible way, which allows you to quickly identify and maintain a safe work environment. However, the non -performance of metal joints of heads and metal coatings, return veins and cable armor with one end of the cable, provided that this is to prevent the electrical potential outside the station or reduce flow in the return veins, and at the same time special protective measures are used.
When using heads made of insulation material or noiseless cable end, it is necessary to combine metal coatings, return veins and cable armor with grounding. However, when special protective measures are used, which effectively eliminate the risk of paralysis in the event of a touch of external metal parts of the cable line, it is allowed to interrupt the electrical continuity of these parts. Such an interruption may take place when the use of insulation muffs that prevent foreign currents from the metal parts of the cable, or when there is a need to avoid connecting isolated systems through the metal parts of the cable. In this way, special protective measures and a conscious approach to grounding are a key element in ensuring the safety of cable lines.
