Features: 1) Motor structure: capacitor-run induct external rotor motor2) Motor protection: termal protect (standard speed); impedance protect (half/low speed)3) Insulation resistance: 100MΩ or over with a DC 500 Megger4) Insulating grade: B; protecting grade: IP545) Dielectric withstand voltage: AC 1,800, 3s6) Allowable ambient temperture range: -20 - +90°C (operating); -40 - +90°C (storage)