... /3TB contactor,also can be installed as single unit.3UA thermal relay series are suitable for overload and phase-failure protection ... can be regulated and the setting current values of many thermal elements are intercrossing overleapping arrangement, for easy selecting by the ... 3UA66 400 1000 80~125, 125~200, 180~250, 200~320, 250~400 3UA68 630 1000 320~500, 400~630 3UA thermal overload ...