<P>Use:Alternating transmission line & power transformer and overload protection.Protect power transformer from Broker internal breakdown,switch off the mini current. </P> <P>Reauirements? Attitude??1 000m </P> <P>Temperature?±40°C </P> <P>Wind speed??35m?s </P> <P>The place must be no burn?explode and shock Environment pollution?grade IV Earthquake strength??grade 8 Technical Parameter? Rated voltage(kV)?1 2-1 5 Rated current(A)?1 00-200 Rated switch-off current(kA)?6?3-1 2?5 Minimum switch-off current(5A fusing filament) Power frequency dry resisting voltage(W)?42 Power frequency wet resisting voltage(W)?34 Impulse resisting voltage(kV)?90 </P>