CJX1 series exchange contact device, mainly uses in to exchange 50Hz or 60Hz, 660V~1000V, when the AC-3 use category the fixed working voltage is 380V the fixed operating current is in the 9A~400A power circuit. Mainly puts through for the long-distance range with the minute breaks using of the electric circuit, and is suitable for the control motor starting, stops and the reverse. This product conforms to standard IEC60947-4-1, 1 ambient environment temperature : -25~+550C;2 Air relative humidity: When +400C does not surpass 50%; Is comparing a low temperature degree-hour of permission to have a higher relative humidity; 3 Altitude above sea level: Does not surpass 2000m;4 Atmospheric condition: Has not been able to cause the explosion hazard medium also not to have to be able the dipping and destroys the insulator the gas and the electric conduction dust; 5 Installs in the not remarkable undulation and the impact vibration place;6 Installs is not having the rain attack the place;7 Control voltage permission change scope: 0.8~1.1Us.