Installation and Operation Guide SOLECTRIA® PVI 25TL-208, PVI 50TL-480 and PVI 60TL-480
DOCR-071030-A (10/7/2022)
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Please note that the Yaskawa Solectria Solar PVI 25TL-208, PVI 50TL-480, AND PVI 60TL-480 module-level rapid
shutdown (RSD) ready wire boxes only contain fuse holders for the positive DC conductors. Follow instructions in
Section 3.3.3.1.3 below for the negative conductors in the RSD wire boxes that will be connected to the busbar.
Rapid Shutdown (RSD) Ready Wire Box Negative DC Conductor Terminations
The RSD Wire Box only contains fuse holders for the positive DC conductors. Follow instructions in Section
3.3.3.1.2 for the positive conductors. The negative DC conductors are to be terminated on the busbar. Strip
approximately 1/2 inch of the cable jacket from the end of the string conductor. Insert the conductor into the
busbar ensuring the stranding of the conductor remains firmly twisted and does not separate. Tighten the screw
to the torque specified in Table 3-7. Continue terminating the remaining source circuits in this manner for each
MPPT (PVIn1, PVIn2, PVIn3).
Fuse Bypass Terminal
The Fuse Bypass Terminal option is for the PVI 28TL-208, PVI 50TL-480 and PVI 60TL-480 wire boxes. Fuse Bypass
Terminals are available as an optional accessory when external PV string fused combiners are used. The Bypass
Terminals allow for larger single conductors to be terminated at each MPPT within the wiring box, bypassing the
input fuses as shown in Figure 3-25. See Section 9.1 Fuse Bypass Terminals for installation information.
Before terminating the PV conductors, verify connector specifications (Table 3-9) and always verify polarity to
avoid risk of reverse polarity.
Electrical Installation AC
The SOLECTRIA PVI 50TL-480, and PVI 60TL-480
are 480VAC, 60Hz, 3-phase grid tied inverters. The SOLECTRIA PVI
25TL-208 is a 208VAC, 60Hz, 3-phase grid tied inverter. The inverter will not operate as specified when installed to
any other grid voltage or frequency. This section includes important information regarding the AC grid connection,
wiring requirements, and installation instructions.
INFO
✔
String Sizing Tool:
Yaskawa Solectria Solar offers a String Sizing Tool to help customers design their PV string
https://www.solectria.com/support/string-sizing-tool/
Transformer Configurations
CAUTION
Improper Transformer Configuration:
Inverter will not run and may have hazardous current. Connect
transformer in specified configurations only (see Figure 3-30).
INFO
✔
Grid Mismatch:
If the grid does not match the requirements of the inverter, the inverter will not start.
