Eaton Power Xpert Solar 1500 User Manua

Electrical ConnectionsPower Xpert Solar 1500/1670 kW Inverter MN141001EN—October 2014 www.eaton.com 27AC EGC ConnectionThe EGC is the Equipment Ground Conductor (GroundingConductor, Equipment in the NEC). The AC equipmentground conductor from the step-up transformer shall bebonded to the AC ground bus that is located in the ACsection of the unit. This bus is for connecting the step-uptransformer enclosure-ground to the inverter, ensuring bothare referenced to the same earth-ground (utility reference).See Figure 24.Figure 24. AC Section Equipment Grounding BusGEC ConnectionThe GEC is the Grounding Electrode Conductor. TheGrounding Electrode Conductor shall be attached to theground terminal labeled Grounding Electrode Terminal (GET)that is located in the DC section of the unit. The minimumwire size is 3/0 for copper (Cu) and 250 kcmil for aluminum(Al) conductor material. This is based upon inverter’s inputDC amperage. Connecting the inverter Install as per2011 NEC 690 and the permitting authority and utility.Step-Up Transformer Sensor SignalsConnection of the step-up transformer sensor signals is viaterminal block TBC1 located in the AC Cabinet. These signalsare made available on the inverter’s Modbus ® network, readyfor remote monitoring. The usage is based upon thetransformer (options). Reference Figure 26 for the locationof TBC1 and Appendix C for example signals. The actualsensors and connections are subject to change due to thestep-up transformer selected, as appropriate for the projectrequirements. Consult with Eaton for both the inverter andstep-up transformer configurations and options prior to order.Accessory PowerWithin the Control Cabinet, available 120 Vac power isprovided via terminal strip TBC3. Use 90 °C rated copper14-AWG for the L-N-G 120 Vac connections, as labeled.Rated 360 W (3 A at 120 Vac), TBC3 is useful for poweringthird-party monitoring gateway, etc. See Figure 25. Use of14-AWG ferrules recommended.Figure 25. Accessory Power LocationACGROUNDBUSAC GROUND& COMM(S)CONDUITFLOOR-PLATEOPENING: 6” x 8”