... two kind of organizations;5th, the circuit breaker has the level -like, center sets at outside the type, CT ... type three kind of structures.Using environment1st, altitude above sea level: <= 1000m (special request separate consults);2nd, ambient temperature: - ... earthquake intensity:Does not surpass 8;5th, contamination rank:III level, IV level (crawls the electricity to compare the distance: 25mm/KV, ...