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Installation and Operation Guide SOLECTRIA
Transformer Configuration
Grid Mismatch
If the grid does not match the requirements, the inverter will not start and damage may
occur. Check with the local electric utility before selecting a grid standard.
The system must comply with the National Electrical Code ANSI/NFPA 70 and with all
local rules and safety regulations before the inverter can be operated.
Yaskawa Solectria Solar's XGI 1500 DCG inverters require AC output connection to a wye-configured service
with a floating neutral (see Figure 3-10), or an ungrounded delta. The XGI inverter uses Neutral for AC voltage
sensing, when a Neutral is available. Acceptable service configurations are depicted in the figure below.
Maximum Number of Inverters on a Transformer Winding
Connect no more than eight (8) XGI 1500-DCG inverters to the same winding of a
transformer. All other connections, such as for site loads (lighting, metering, etc), must
be galvanically isolated from the inverters. See the Appendix for the External
Transformer Specification Guide for the XGI 1500-DCG inverters.
DOCR-071081-B
®
XGI 1500 DCG Series Inverters
Figure 3-10 Permitted Transformer Configurations
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