Eaton CUTLER-HAMMER MD-3000 series Installation, Operation And Maintanance

For more information visit: www.EatonElectrical.comInitial ReleaseFig. 4-2 MD-3001 Protective Dimensions (Inches)4-3 WIRINGThe wiring of the MD-3000 Protective Relay must follow asuitable “wiring plan drawing.” The term wiring plan, asused here, refers to the drawings made for the specificapplication. It describes all electrical connections betweenthe MD-3000 and external equipment. The user makes thisdrawing. It may also be helpful to refer to the relay’sspecific wiring diagram shown in Figure 3-1. An exampleof a typical wiring plan is shown in Figure 2-1. Note thefollowing:1. The wires to the terminal blocks must not be largerthan AWG No. 14. Larger wire will not connectproperly to the terminal block. However, larger sizewires can be used for the Ct connections, withappropriate ring terminal.2. The terminal block has No. 6-32 sems pressuresaddle screws.3. All contacts are shown in their de-energized position.Note that the Protection Off Alarm Relay is energizedwhen control power is applied.Note: Refer to the Specifications and Test Summaryfor proper power supply input requirements. All wiringmust conform to applicable federal, state and local codes.