One of the two must be done for improving power transfer capability or reliability. These decisions are guided by coinciding challenges of time, space and capital.

We, at Sterlite Power, deliver increased power transfer capability by either increasing current ratings (Current Uprating) and/or increasing voltage level (Voltage Uprating) on the existing infrastructure. While current uprating is often achieved by increasing the thermal limits using high-performance conductors, other methods such as dynamic line loading, and improved line surge impedance level are also deployed to achieve adequate thermal limits. Voltage uprating can potentially achieve much higher power transfer capability with reduced electrical losses and increased utilization of the existing system. Increasing the voltage rating of overhead lines is possible if enough electrical clearance is achieved and modifications of terminal substation equipment are made.

Adequate insulation strength and air clearance of the line requires the use of insulating cross-arm, compact phase to phase spacers, re-insulation and tower modifications etc.