Ambient temperature:-5℃+40℃, average value not excee ding +35℃within 24 hours Altitudes: not exceeding 2000mm Atmospheric Conditions: relative humidity not exceeding 50% at +40℃. Temperature shall not exceed +25℃in humid month while max-imum 90% humidity is allowed Pollution grade: 3 Mounting class: III Mounting condition :tilt angle not exceeding ?℃