... when transient voltage (surge) occurs, the whole system about machine tool will be closed, the action is called 'self-preservation ... Protector,Surge Suppressor,Overvoltage Protector,Thunder Protection,Electrical Control,System Protector, Direct Strick Protection, Power solutions, ... Maximum continuous oprtating voltage,Nominal discharge current (wave 8/20 us ), Maximum discharge current (wave 8/20 m/s ...