Design parameters and electrical phenomena

• Geometry information of each assembly
• Special requirements in terms of material
• Different attachments to tower
• Hotline maintenance capabilities
• Use of corona rings and relative characteristics
• Type of preferred suspension clamps, conductor terminals
• Electrical clearances
• Standard or high-temperature conductor
• Environmental conditions affecting type of galvanizing (standard or heavy)
• Electrical and mechanical performance requirements
• Type of transmission line: AC or DC power supply

Main electrical phenomena 

Corona effect

It is essential in the design and drawing of various components to have corona free insulator strings and for this purpose suitable corona protection devices, if needed, are also designed to minimize:

• Audible noises and colored sparking that on the long run could damage hardware and insulators
• Power losses
• Radio frequency noises

RIV effect 

Radio Interference is associated with the pulsating modes of corona discharges and, if not controlled, radio frequency noise causes serious electromagnetic interference to communications systems in the vicinity. This effect therefore is a consequence of corona effect that is properly controlled by Salvi design, as stated above, also radio interferences, if any, are negligible.

Short circuit currents

Short circuit currents link to direct lightning effect on line or switching in a substation can impact installation with strong energy effect. This electrical discharge is managed by design made by Sicame, we can assume the integrity of string hardware and safety of overhead line during these critical phases. The design of products limits the warming of products and facilitates the electric discharge to limit the impact on the material.