YASKAWA Solectria PVI 25TL-480-R Installation And Operation Manual page 36

Installation and Operation Guide SOLECTRIA PVI 25TL-480-R
3.5.1 Transformer Configurations
CAUTION
Improper Transformer Configuration: Inverter will not run and may have hazardous current. Connect transformer in
specified configurations only (see Figure 3-20).
NOTICE!
480 VAC, 60Hz, Grid Grounded Wye ONLY: The inverter is only rated for 480 VAC, 60Hz, 3-Phase grounded Wye.
Installing the inverter on any other electrical grid will damage the inverter and void the warranty.
INFO ✔
Grid Mismatch: If the grid does not match the requirements of the inverter, the inverter will not start.
Check with your local electric utility before selecting a grid profile. The system must comply with National Electrical
Code ANSI/NFPA 70 and with all local rules and safety regulations before the inverter can be operated.
The inverter must be connected to a 480VAC, 60Hz, grounded Wye configured transformer/electrical grid. If the
installation location does not meet these requirements, an isolation transformer may be used.
The inverter side of the transformer must have a grounded Wye configuration. See Figure 3-20 for approved transformer
configurations; no other configurations are permitted. Figure 3-21 shows examples of transformers that are not
acceptable.
Figure 3-20 Permitted Transformer Configurations
DOCR-071030-A (11/17/2020) Page 36 of 101