Eaton ATC-900 Instruction Booklet

Also see for ATC-900: Operation and maintenance manual Manual Operation and maintenance manual Instruction booklet Operation and maintenance manual

Contents

IB140036EN For more information visit: www.eaton.comInstruction BookletEffective: October 2014 Page 7O&M Manual for 40-1200A (480/600 Vac) ATC-900 3-Position,Open/Closed Transition Contactor Based Transfer SwitchSection 3: Equipment Description3.1 GeneralThe ATS consists of three basic panels:1. The power panel;2. The voltage selection and transformer panel; and3. The microprocessor-based logic panel.These panels are interconnected via connector plugs andmounted in an enclosure (Figure 5A & 5B).LOGICPANELPOWERPANELVOLTAGE SELECTION& TRANSFORMER PANELFigure 5A. Three Basic Panels of an Open Transition ATS(1200A).LOGICPANELPOWERPANELVOLTAGE SELECTION& TRANSFORMER PANELFigure 5B. Three Basic Panels of a Close Transition ATS(1200A).3.2 Power PanelThe power panel is used for making load, power, and neutral con-nections. The power contactor is mounted on a steel baseplate(Figure 6).3.2.1 Main ContactsThis ATS incorporates a power contactor. The main contactsconnect and disconnect the load to and from the different powersources. The power contactor is mechanically and electricallyinterlocked to prevent the two sets of main contacts from beingclosed simultaneously (applicable for open transition ATS only).