Main technique parameters:
1) The arrester's rated voltage (virtual value): 12.7, 16.5, 17kV  
2) The system's nominal voltage (virtual value): 10kV 
3) The constant operation voltage (virtual value): 6.6, 12.7, 13.6kV 
4) The DC reference voltage (Ulm A) no less than: 24kV
5) The biggest remain voltage (climax value):
    a) Under steep-wave surge current: 51.8kV 
    b) Under thunder lighting surge current: 45kV 
    c) Under operation surge current: 38.3kV 
6) 200μs square wave current (climax value): 150A
7) 4/100μs surge current (climax value): 40kA 
8) The biggest leakage current under 0.75DC reference voltage: 50kV