Model Number: GW9-12 Brand Name: YUFLY Key Specifications/Special Features: 1.1 environmental conditions1.1.1 altitude about sea level: 1000-3000m1.1.2 ambient temperature: upper limits +40℃, lower limits-35℃ (high and cold area ≥-40℃)1.1.3 wind speed: not exceeding to 34m/s1.1.4 earthquake intensity: not exceeding 8 degrees1.1.5 Ice covering thickness: not exceeding 10mm ItemUnit Data Rated voltage kV 12 Rated current A 630 Rated power frequency Hz 50,60 Rated peak withstand current kA 50 Rated short time withstand current kA 20 Rated short circuit duration time s 4 1 min P.F withstand voltage kV 42 Lightning impulse withstand voltage kV 75 Operating mechanism handle, motor Mechanical lifetime Times 2000 Rated operation voltage if for motor mechanism V 220V DC AC