With the environmental exposure to ice and/or wind Overhead Transmission and Distribution Lines that are bare open-wire design are quite susceptible to conductor motion that may result in outages or interruptions on the electrical system due to conductor contact, flash-overs, or any plant damage. Interphase spacers were developed to minimize the probability of these occurrences by insuring that conductors remain apart during their movement. In the last few years, increased use of interphase spacers of composite design has been made possible due to the generally massive advances made in the development and acceptance of composite insulators.
Safdar Sassani’s interphase spacers consist of silicone rubber insulation over a fiberglass rod. They are very light and flexible. They are connected on the conductor with clamps with or without armour rods.
Mechanical Design of Interphase Spacers
Interphase spacers are subjected to rather different loads compared to the insulators . More specifically, IPS(Interphase spacers) are loaded dynamically primarily by short circuit, ice shedding and galloping. The respective forces have to be taken into account accordingly when dimensioning the IPS.
- Shedding of Ice Loads
- Electrodynamic Short-Circuit Loads