Contemporary telecommunications and energy infrastructure is based on extensive cable networks, which allow not only the transmission of data and energy, but also their distribution and control. In this context, cable handles, connection boxes and cables for connecting return veins play a key role. However, in order for them to properly fulfill their function, they must be made according to rigorous standards.
Principles of performing cable handles
Cable handles are a key element of telecommunications and energy infrastructure, therefore they must meet raw standards and regulations to ensure reliability and safety of the installation. According to PN-EN IEC 61914, cable handles must be made of non-magnetic and fireproof materials, as well as resistant to UV radiation in the case of their use outside. In addition, having in mind the place of installation, mechanical loads and electromechanical forces, the properties of the handles must be properly matched.
Special standards must therefore meet not only the cables themselves, orwire scissors, but also all the equipment used. It is necessary to meet the requirements for resistance to electromechanical forces, so that the handles can withstand short-circuit current, in accordance with the PN-EN IEC 61914 standard. In addition, handles manufacturers should have a certified production management system in accordance with ISO 9001, and the documentation provided should contain detailed information on the classification, allowable loads and data resistance data.
How do connecting boxes work?
Connecting boxes are a key element in cable systems that allow connecting and grounding of cables return. Their operation can be adapted to a specific need, which often also includes protection against surge by equipping with appropriate limiters. In the case of assembly of grounding boxes with surge limiters at overhead heads, single -phase performance is preferred.
The key issue is also the material from which the box housing is made. Depending on the working conditions and location, the housing should be made of stainless steel or other material with proven corrosion resistance, and in the case of assembly under ground level, covered with anti -corrosion preparation. The materials matter here, as in the case of such equipment aswire scissors.
An important aspect is also to ensure an adequate degree of protection, which according to PN-EN 60529 should be IP 66 for outdoor boxes above the ground level and IP 68 for those placed below ground level in cable wells. In addition, both on the outside of the cover and inside the boxes, there are markings informing about high voltage, the name of the current track and phase designation.
Added value is also the possibility of disconnected connections inside the boxes, which facilitates maintenance and repair. Finally, the parameters of resistance to short -circuit currents and electrical strength declared by the manufacturer should be confirmed by electrical tests to ensure full compliance with technical standards and requirements.
How are the cables to connect the return veins?
Fastening cables for connecting return veins is a key element of ensuring stability and reliability of telecommunications and energy infrastructure. They belong to the equipment necessary for the construction of cable lines, just like the overhead lines, the scissors are used, among othersAfl.
In the case of removal of return veins from crossbonding muff, in accordance with technical standards, it is recommended to use concentric cables. However, in justified situations, it is also acceptable to lead with two single cables. Fastening with grounding muff is made using single cables.
It is important that the cable veins are made of copper or in justified cases, also from aluminum, and have a seal to prevent moisture and water to prevent penetration. In order to ensure adequate electrical insulation strength, the parameters declared by the manufacturer should be confirmed by electrical tests in accordance with the IEC 62067 standard.
Fastening cables for connecting return veins plays a key role in ensuring reliability and security of cable systems, which is why special attention should be paid to the fulfillment of technical requirements and standards regulating this process.
