1、FN3-12、FN3-12R、FN3-12R/S Series are used in the network of AC 50Hz、6KV or 12KV for breaking or closing load and over-load current. they are also used in breaking and closing no-loading . The switch or no-load transformer and capacitor with KN3 type fuse box. Can cut off short-circuit for protecting switch.
2、They can be equipped with CS3 type and CS2 type handle operating mechanism.
1 、The altitude does not exceed 1000m. 2、The ambient air temperatrue : Max:+40oC. Min:-10oC. 3、The relatire humidity of air not bigger 90% (temperature:25oC) 4、The working situation have no conductivity dust. 5、The working situation have no corrosive gas of effect insulation anddestroy metal. 6、The working situation without violent vibration and striking. 7、The working situation have no explosive danger and fire.