UNE 211067-1 Extruded Insulated Power Cables and Accessories with Rated Voltage Greater than 150 kV (Um = 170 kV), Up to 400 kV (Um = 420 kV) - Part 1: Requirements and Test Methods

In the UNE 211067-1 standard developed by the Spanish Organization for Standardization (UNE), the requirements for extruded insulated power cables and accessories for nominal voltages between 150 kV (Um = 170 kV) and 400 kV (Um = 420 kV) are explained and test methods are defined.

High voltage power cables with extruded insulation are defined by characteristics such as voltage designation, number of cores and size. An exemplary use is in a high voltage distribution system.

The mentioned standard includes cables insulated by extrusion process and used in power distribution systems with the highest system voltage not exceeding the effective value Um = 420 kV. The main purpose of this standard is to determine the requirements for cables that directly affect safety and to explain the required test methods.

The extrusion process is a process applied to create a cross-sectional profile of cables. Extrusion is a process used to create objects with a fixed cross-section profile by pushing material through a die of desired cross-section. In other words, extrusion is a process in which a material undergoes plastic deformation by the application of a force that causes it to flow through a hole or die. If the material adopts the cross-section profile of the mold and has suitable properties, this shape is maintained.

The insulation of power cables is achieved through an extrusion process. This manufacturing process involves melting plastic resin and other components together. The resulting liquid is then continuously extruded through a mold and expands during the cooling process. The extruded dielectric offers several advantages, making the cables lighter and easier to install. This process also allows the cables to operate at high temperatures and high electrical voltages.

Among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, our organization, with its trained and expert staff and advanced technological equipment, within the scope of UNE 211067-1 standard, rated voltage higher than 150 kV (Um = 170 kV), It also provides testing services for extruded insulated power cables and accessories up to 400 kV (Um = 420 kV).