CJX7-9~110 AC contactor (hereafter refer to as contactor) is mainly used in power system with AC 50Hz (or 60Hz), therated working voltage up to 660V, under the appplication category of AC-3, when the rated working voltage 380V, the rated operating current to 110A electrical, for the long-distance range making and breaking the electric circuit, and combines the electromagnetism starter with the suitable thermal overload relay or the electronic protector to protect against the possible overload electric circuit during operation(running).
Type and meaning
1: A.C contact 2: Design code 3: The basic specification code is indicated with the rated working voltage 380V rated operating current numerical value under AC-3 application category 4: The main contact pair indicated with two figures, ones place expressed NC contact Pair; The tens digit expressed NO contact pair; 5: The auxiliary contact pair indicated with two figures, ones placeexpressed NC; The contact pair, the tens digit expressed NO contact pair;
Normal Working Condition and Mounting condition
■ The installation site elevation does not surpass 2000m; ■ Ambient air temperature should not over +40℃, also not over +35℃ within 24h, the lower limit of ambient air temperature is -5℃; ■ The air relative humidity at installation site should not over 50% when the maximum temperature is +40℃;the higher relative humidity are allowed under lower temperature, foir example, 90% at 20℃ .It must take the measures on on the product occuring dew because of the change of temperature. ■ The installation site pollution chass is 3; ■ The contactor can be mounted vertically or horizontally. If vertically mounts, the gradient between the mounter surface and the perpendicular plane is not bigger than +30%; (See Fig1).
Technical parameter
■ The allowable application category of main circuit and the auxiliary circuit of the contactor and it’s code see Table 1 application category of main circuit and the auxiliary circuit of the contactor and it’s code
Circuit
Application category code
Example of the typical usage
Main circuit
AC-1
Noninductive or the micro ineuductive load, resistance furnace
AC-2
The starting and breaking of wire winding type asynchronous motor
AC-3
The starting and breaking during operation of cage asynchronous motor
AC-4
The starting,plug braking or reverse revolution,spot moving of cage asynchronous motor
Auxliary circuit
AC-15
Control AC electromagnet load (>72VA)
DC-13
Control DC magnet load
■ Contactor reated insulation voltage (Ui), rated working voltage (Ue), conventional free air heat current (lth), rated operating current (le)and rated work rate see Table 2.
