NKG-3经纬度时控开关英文说明书.doc

NKG- 3 Time Switch ( The time switch can be automatically adjusted according to the latitude and longitude of the switching time .) 1. Function and Scope NKG-3 time switch (hereinafter referred to as“ time switch ”) is applicable for regularly controlling switch-on and off of street lamps , advertising light boxes and other equipments in automatic control circuit with AC frequency of 50Hz, rated control power voltage of 220V at most and rated working current of3A at most. the product may be used to adjust the switch-on and off time everyday according to the latitude. The plies with the requirements of Standard GB and IEC 60947-5-1. 2. Model and Its Meaning 3. Normal Operating Condition and Installation Condition Ambient air humidity: -5℃~+40 ℃, and the average temperature is no more than +35 ℃ in 24h. Altitude: no more than 2, 000m. Humidity: the relative air humidity of the installation site shall be no more than 50% when the maximum temperature is +40 ℃, while it can be higher under lower temperature. Special measures shall be taken for the condensation occasionally formed due to temperature change. Pollution level: 3. In the medium with explosion hazard and no gas that is enough to corrode metal and destroy the insulation and the place shall not have severe conductive dust. In the place where is provided with anti-snow and anti-rain equipment