Eaton Power Xpert Solar 1500 User Manua

Electrical ConnectionsPower Xpert Solar 1500/1670 kW Inverter MN141001EN—October 2014 www.eaton.com 23Figure 19. Typical Mounting with MV Transformer, continuedNeutral and Equipment GroundThe low voltage connection of the utility-grid transformer is a3-wire Delta (A, B, C). The inverter’s 3-wire system does notinclude a neutral and cannot be connected to a neutral.The ground listed in Table 8 is the equipment groundingconductor (EGC) between the inverter and transformer.This EGC is routed separate from the phases in the throatconnection/enclosure.This means that a grounded (neutral) configuration shouldnot be used. Only Delta or Wye ungrounded configuration onlow voltage side should be used.Phase RotationThe inverter is phase A-B-C sequence sensitive The throatconnection is fixed, such that Phase-A peaks before Phase-B,and Phase-B peaks before Phase-C. This inverter AC-outputsequence cannot be changed. Therefore, check the utilityphase-sequence and make any adjustments at the mediumvoltage side of the transformer or the facility grid-tie point(s).Pre-determined the grid (PCC) phase rotation to ensure theproper phase-wiring sequence as part of the installation.CBAOUTPUT PHASEROTATION SEQUENCEA−B−C