Retrofit of Medium-Voltage (MV) Circuit Breakers

Dalmine, BG (Italy)






Design and implementation of medium-voltage circuit-breakers, HD4-RG and HD4-MG models for the retrofit of the medium-voltage switchgears.

The HD4 series of medium voltage circuit-breakers for primary distribution use SF6 (sulphur hexafluoride gas) both to extinguish the electric arc and as insulating medium. That has allowed replacing the old technology consisting of oil insulation with the more modern SF6 gas-insulation. Breaking in SF6 gas allows a limited generation of overvoltages and ensures long electrical life of the circuit-breaker and installations.

Related projects to Retrofit Solution

Circuit breakers Retrofitting 1250 A / 2500 A / 4000 A

Holland (The Netherlands)

Retrofit project of medium voltage (MV) circuit-breakers carried out inside a shelter park for the primary distribution and run by one of the leading companies in the electricity distribution field in the south of the Netherlands.