Driving rod for medium voltage switching element gear
A device for medium or high voltage switching element gear, the device having: a switching element for connecting two conductors: and a driving rod for operating the switch, wherein the driving rod comprises at least a surface layer of an electrically high resistance material. The electrically high resistance material ensures that a small current will flow through the material due to the present electrical field. This small current will cause a heating of the driving rod, such that condensation is reduced or prevented.
1. A device for a medium or high voltage switching element gear, the device comprising:
a switching element configured to connect two conductors; and
a driving rod configured to operate the switching element, wherein the driving rod includes a surface layer including an electrically high resistance material,
wherein the surface layer includes a dispersion including insulating particles and electrical conducting particles.
2. The device of claim 1 , wherein the driving rod is coated with electrically high resistance material.
3. The device of claim 1 , wherein the surface layer is a nanocoating.
4. The device of claim 3 , wherein the nanocoating has super-hydrophobic properties.
5. The device of claim 1 , wherein the switching element is a vacuum interrupter.
6. The device of claim 1 , wherein the switching element is a disconnector.
7. The device of claim 1 , further comprising:
an electrical contact arranged on the surface layer of the driving rod; and
an indicator configured to indicate the voltage on the electrical contact.
8. The device of claim 1 , wherein the electrically high resistance material is not a perfect isolator.
9. The device of claim 1 , wherein electrically high resistance material allows that a current to flow through the material high resistance material in the present of a voltage difference across the driving rod.