Because of increasing difficulties in securing approvals for new transmission corridors, various new technologies for line uprating have been developed and are now being implemented. The basic idea is to use existing line corridors to transfer more power.

Powerlink Queensland is an Australian government owned network service provider whose extensive transmission network operates at 110 kV, 132 kV, 275 kV and 330 kV.

Selection of hollow composite insulators for application on equipment such as bushings, surge arresters, breakers and instrument transformers has increased worldwide. For example, where reduced weight or superior pollution performance are the key decision criteria, the majority of such apparatus is now being ordered equipped with this type of insulator.

The challenge of protecting the grid and maintaining system reliability depends on proper inspection and testing of insulators, particularly as system voltages and criticality of lines increase.