IXOSIL EST SUB with surge arrester is the new addition to the range of dry outdoor cable terminations for substations and high-voltage transmission towers. The new solution covers voltage levels ranging from 123 kV to 170 kV and combines, for the very first time, a dry-insulated Ixosil cable termination with a surge arrester in one single unit. This increases the reliability of cable systems deployed in high-voltage applications while reducing the time and costs for installation.
Outdoor cable terminations have to fulfill very exacting requirements. The units, which are exposed to harsh wind and weather conditions, must connect cable ends reliably to overhead power lines and busbars for at least 40 years to such an extent that any high voltages and electrical fields that occur do not get out of control. On top of this, electrical transmission and distribution networks have to be protected against overvoltages caused by lightning strikes, mains fluctuations, and switching operations. Sources of error in the individual components must also be minimized to ensure a high level of network availability. Combined with the properties typical of dry-insulated cable terminations, IXOSIL EST SUB with surge arrester performs these tasks perfectly. The EST SUB with integrated solid-insulated surge arrester is available in two variants: the EST SUB SA for solidly grounded systems and the EST SUB SAC for compensated systems.