
| 
 Rated voltage (KV)  | 
 Rated mechanical tension load (KN)  | 
Structure of coupling marks | 
 Structure height (mm)  | 
 Min.Electric arc distance (mm)  | 
 Min nominal creepage distance (mm)  | 
 Full wave lightning impulse withstand voltage(peak value)not less than (kv)  | 
 1min power frequency wet withstand voltage not less than (kv)  | 
| 66 | 70 | 16 | 870±15 | 700 | 1900 | 410 | 185 | 
| 66 | 100 | 16 | 940±15 | 700 | 1900 | 410 | 185 | 
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