Opening resistor:Adds significantly to mechanical complexity of the CB; not viable – technically or economically – on single pressure SF6 CB; reignitions can still occur.
SA to ground at shunt reactor:Effective only for CB producing suppression peak overvoltages in excess of the surge arrester protective level
Surge arrester across CB: Adds to complexity of CB; SA must be able to withstand forces associated with circuit breaker operation; some reignitions will still occur, albeit at low voltage levels.
Surge capacitor: Does not influence ka for CBs other than vacuum type; leads to increased chopping current but not necessarily increased suppression peak overvoltages; does not eliminate reignitions; may have the effect of reducing the minimum arcing time such that probability of reignitions is unchanged; require space.
Controlled switching: Suitable only for mechanically consistent CBs with appropriate minimum arcing times; some applications require independent pole operation.
CB with higher voltage rating:Increased cost, increased space requirement.
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.OkPrivacy policy