the mounting dimensions to equate 3TB which, 3TF, the 3TD contact device produces in Germany Siemens. contactor :The CJX1 series exchange contact device is suitable in exchanges 50Hz or 60Hz, the voltage as for 660V, the nominal current to the 630A power circuit, for the long-distance range and the control motor connection and breaking, contact device's control circuit has the exchange (AC) and ...