The product is to service at the electrical circuit of AC 50~60Hz, AC380V, DC220V and current of 2A to control the start, stop or conversion of the motor and at large-scale gate valve to regulate valve open or position limit. The switch is splash-proof but mustn’t be immersed into water.      The nominal service conditions include an ambient temperature of-30℃∽+40℃, ambient relative humidity of 85%, an altitude of 1000m, operation frequency of 600times/min., swing of 0.5mm and protection degree of IP65. It complies with the standard of GB14048.5-93.