Charging-current limitations in cable lines

THE CAPABILITY of high-voltage cable lines to deliver power diminishes rapidly as the length of line increases. This is shown in Fig. 1 which is valid for the cable sizes commonly used for operation at 132 kilovolts and higher voltages. Rough approximations for general use may also be taken from these curves for 66-kv cables, but new curves would have to be prepared for greater than 15-per-cent accuracy.