The change of temperature shall be fully considered (ie. Day/night, summer/winter). Please input the difference in temperature between the ambience and the max. admissible one inside electrical enclosure(generally 35 C)

It refers to the heat loss generated by the components inside enclosure (such as transformer, contactor, semiconductor, inverter, PLC and etc.)

空气不断F是取决于海拔高度（海平面以上）的地方安装。 它的因素在减少，气压和空气密度随高度。

高度（海平面以上）在米